Respectful Maternity Care : A Systematic Review.

BACKGROUND: Severe maternal morbidity and mortality are worse in the United States than in all similar countries, with the greatest effect on Black women. Emerging research suggests that disrespectful care during childbirth contributes to this problem. PURPOSE: To conduct a systematic review on definitions and valid measurements of respectful maternity care (RMC), its effectiveness for improving maternal and infant health outcomes for those who are pregnant and postpartum, and strategies for implementation. DATA SOURCES: Systematic searches of Ovid Medline, CINAHL, Embase, Cochrane Central Register of Controlled Trials, PsycInfo, and SocINDEX for English-language studies (inception to July 2023). STUDY SELECTION: Randomized controlled trials and nonrandomized studies of interventions of RMC versus usual care for effectiveness studies; additional qualitative and noncomparative validation studies for definitions and measurement studies. DATA EXTRACTION: Dual data abstraction and quality assessment using established methods, with resolution of disagreements through consensus. DATA SYNTHESIS: Thirty-seven studies were included across all questions, of which 1 provided insufficient evidence on the effectiveness of RMC to improve maternal outcomes and none studied RMC to improve infant outcomes. To define RMC, authors identified 12 RMC frameworks, from which 2 main concepts were identified: disrespect and abuse and rights-based frameworks. Disrespect and abuse components focused on recognizing birth mistreatment; rights-based frameworks incorporated aspects of reproductive justice, human rights, and antiracism. Five overlapping framework themes include freedom from abuse, consent, privacy, dignity, communication, safety, and justice. Twelve tools to measure RMC were validated in 24 studies on content validity, construct validity, and internal consistency, but lack of a gold standard limited evaluation of criterion validity. Three tools specific for RMC had at least 1 study demonstrating consistency internally and with an intended construct relevant to U.S. settings, but no single tool stands out as the best measure of RMC. LIMITATIONS: No studies evaluated other health outcomes or RMC implementation strategies. The lack of definition and gold standard limit evaluation of RMC tools. CONCLUSION: Frameworks for RMC are well described but vary in their definitions. Tools to measure RMC demonstrate consistency but lack a gold standard, requiring further evaluation before implementation in U.S. settings. Evidence is lacking on the effectiveness of implementing RMC to improve any maternal or infant health outcome. PRIMARY FUNDING SOURCE: Agency for Healthcare Research and Quality. (PROSPERO: CRD42023394769).

Oxytocin: physiology, pharmacology, and clinical application for labor management.

Oxytocin is a peptide hormone that plays a key role in regulating the female reproductive system, including during labor and lactation. It is produced primarily in the hypothalamus and secreted by the posterior pituitary gland. Oxytocin can also be administered as a medication to initiate or augment uterine contractions. To study the effectiveness and safety of oxytocin, previous studies have randomized patients to low- and high-dose oxytocin infusion protocols either alone or as part of an active management of labor strategy along with other interventions. These randomized trials demonstrated that active management of labor and high-dose oxytocin regimens can shorten the length of labor and reduce the incidence of clinical chorioamnionitis. The safety of high-dose oxytocin regimens is also supported by no associated differences in fetal heart rate abnormalities, postpartum hemorrhage, low Apgar scores, neonatal intensive care unit admissions, and umbilical artery acidemia. Most studies reported no differences in the cesarean delivery rates with active management of labor or high-dose oxytocin regimens, thereby further validating its safety. Oxytocin does not have a predictable dose response, thus the pharmacologic effects and the amplitude and frequency of uterine contractions are used as physiological parameters for oxytocin infusion titration to achieve adequate contractions at appropriate intervals. Used in error, oxytocin can cause patient harm, highlighting the importance of precise administration using infusion pumps, institutional safety checklists, and trained nursing staff to closely monitor uterine activity and fetal heart rate changes. In this review, we summarize the physiology, pharmacology, infusion regimens, and associated risks of oxytocin.

Prenatal methamphetamine use increases risk of adverse maternal and neonatal outcomes.

BACKGROUND: Although methamphetamine use has been increasing in recent years and occurring within new populations and in broader geographical areas, there is limited research on its use and effect in pregnancy. OBJECTIVE: This study aimed to examine the association between prenatal methamphetamine use and maternal and neonatal outcomes in a large, contemporary birth cohort. STUDY DESIGN: This was a retrospective cohort study using California-linked vital statistics and hospital discharge data from 2008 to 2019. Methamphetamine use was identified using the International Classification of Disease, Ninth Revision and Tenth Revision, codes. Chi-square tests and multivariable Poisson regression models were used to evaluate the associations between methamphetamine use and maternal and neonatal outcomes. RESULTS: A total of 4,775,463 pregnancies met the inclusion criteria, of which 18,473 (0.39%) had methamphetamine use. Compared with individuals without methamphetamine use, individuals with methamphetamine use had an increased risk of nonsevere hypertensive disorders (adjusted risk ratio, 1.81; 95% confidence interval, 1.71-1.90), preeclampsia with severe features (adjusted risk ratio, 3.38; 95% confidence interval, 3.14-3.63), placental abruption (adjusted risk ratio, 3.77; 95% confidence interval, 3.51-4.05), cardiovascular morbidity (adjusted risk ratio, 4.30; 95% confidence interval, 3.79-4.88), and severe maternal morbidity (adjusted risk ratio, 3.53; 95% confidence interval, 3.29-3.77). In addition, adverse neonatal outcomes were increased, including preterm birth at <37 weeks of gestation (adjusted risk ratio, 2.85; 95% confidence interval, 2.77-2.94), neonatal intensive care unit admission (adjusted risk ratio, 2.46; 95% confidence interval, 2.39-2.53), and infant death (adjusted risk ratio, 2.73; 95% confidence interval, 2.35-3.16). CONCLUSION: Methamphetamine use in pregnancy is associated with an increased risk of adverse maternal and neonatal outcomes that persists after adjustment for confounding variables and sociodemographic factors. Our results can inform prenatal and postpartum care for this high-risk, socioeconomically vulnerable population.

New labor curves of dilation and station to improve the accuracy of predicting labor progress.

BACKGROUND: The diagnosis of failure to progress, the most common indication for intrapartum cesarean delivery, is based on the assessment of cervical dilation and station over time. Labor curves serve as references for expected changes in dilation and fetal descent. The labor curves of Friedman, Zhang et al, and others are based on time alone and derived from mothers with spontaneous labor onset. However, labor induction is now common, and clinicians also consider other factors when assessing labor progress. Labor curves that consider the use of labor induction and other factors that influence labor progress have the potential to be more accurate and closer to clinical decision-making. OBJECTIVE: This study aimed to compare the prediction errors of labor curves based on a single factor (time) or multiple clinically relevant factors using two modeling methods: mixed-effects regression, a standard statistical method, and Gaussian processes, a machine learning method. STUDY DESIGN: This was a longitudinal cohort study of changes in dilation and station based on data from 8022 births in nulliparous women with a live, singleton, vertex-presenting fetus ≥35 weeks of gestation with a vaginal delivery. New labor curves of dilation and station were generated with 10-fold cross-validation. External validation was performed using a geographically independent group. Model variables included time from the first examination in the 20 hours before delivery; dilation, effacement, and station recorded at the previous examination; cumulative contraction counts; and use of epidural anesthesia and labor induction. To assess model accuracy, differences between each model's predicted value and its corresponding observed value were calculated. These prediction errors were summarized using mean absolute error and root mean squared error statistics. RESULTS: Dilation curves based on multiple parameters were more accurate than those derived from time alone. The mean absolute error of the multifactor methods was better (lower) than those of the single-factor methods (0.826 cm [95% confidence interval, 0.820-0.832] for the multifactor machine learning and 0.893 cm [95% confidence interval, 0.885-0.901] for the multifactor mixed-effects method and 2.122 cm [95% confidence interval, 2.108-2.136] for the single-factor methods; P<.0001 for both comparisons). The root mean squared errors of the multifactor methods were also better (lower) than those of the single-factor methods (1.126 cm [95% confidence interval, 1.118-1.133] for the machine learning [P<.0001] and 1.172 cm [95% confidence interval, 1.164-1.181] for the mixed-effects methods and 2.504 cm [95% confidence interval, 2.487-2.521] for the single-factor [P<.0001 for both comparisons]). The multifactor machine learning dilation models showed small but statistically significant improvements in accuracy compared to the mixed-effects regression models (P<.0001). The multifactor machine learning method produced a curve of descent with a mean absolute error of 0.512 cm (95% confidence interval, 0.509-0.515) and a root mean squared error of 0.660 cm (95% confidence interval, 0.655-0.666). External validation using independent data produced similar findings. CONCLUSION: Cervical dilation models based on multiple clinically relevant parameters showed improved (lower) prediction errors compared to models based on time alone. The mean prediction errors were reduced by more than 50%. A more accurate assessment of departure from expected dilation and station may help clinicians optimize intrapartum management.

First and Second Stage Risk Factors Associated with Perineal Lacerations.

OBJECTIVE: To determine intrapartum factors associated with perineal laceration at delivery. METHODS: This was a planned secondary analysis of a multicenter randomized clinical trial of delayed versus immediate pushing among term nulliparous women in labor with neuraxial analgesia conducted in the United States. Intrapartum characteristics were extracted from the medical charts. The primary outcome was perineal laceration, defined as second degree or above, characterized at delivery in women participating in longer term pelvic floor assessments post-delivery. Multivariable logistic regression was used to refine risk estimates while adjusting for randomization group, birth weight, and maternal age. RESULTS: Among the 941 women participating in the pelvic floor follow-up, 40.6% experienced a perineal laceration. No first stage labor characteristics were associated with perineal laceration, including type of labor or length of first stage. Receiving an amnioinfusion appeared protective of perineal laceration (adjusted odds ratio, 0.48; 95% confidence interval 0.26-0.91; P = 0.01). Second stage labor characteristics associated with injury were length of stage (2.01 h vs. 1.50 h; adjusted odds ratio, 1.36; 95% confidence interval 1.18-1.57; P < 0.01) and a prolonged second stage (adjusted odds ratio, 1.64; 95% confidence interval 1.06-2.56; P < 0.01). Operative vaginal delivery was strongly associated with perineal laceration (adjusted odds ratio, 3.57; 95% confidence interval 1.85-6.90; P < 0.01). CONCLUSION: Operative vaginal delivery is a modifiable risk factor associated with an increased risk of perineal laceration. Amnioinfusion appeared protective against injury, which could reflect a spurious finding, but may also represent true risk reduction similar to the mechanism of warm perineal compress.

Association between Gestational Age and Perinatal Outcomes in Women with Late Preterm Premature Rupture of Membranes.

OBJECTIVE: The American College of Obstetricians and Gynecologists (ACOG) suggests expectant management until 34 weeks for patients with preterm premature rupture of membranes (PPROM). New data suggest extending to 37 weeks might enhance neonatal outcomes, reducing prematurity-linked issues. This study aims to assess adverse neonatal outcomes across gestational ages in women with PPROM. STUDY DESIGN: A retrospective cohort study was performed using linked vital statistics and the International Classification of Diseases, Ninth Revision data. Gestational age at delivery ranged from 32 to 36 weeks. Outcomes include neonatal intensive care unit (NICU) admission >24 hours, neonatal sepsis, respiratory distress syndrome, necrotizing enterocolitis, intraventricular hemorrhage, and neonatal death. Multivariate regression analyses and chi-square tests were employed for statistical comparisons. RESULTS: In this cohort of 28,891 deliveries, there was a statistically significant decline in all studied adverse neonatal outcomes with increasing gestational age, without an increase in neonatal sepsis. At 32 weeks, 93% of newborns were in the NICU >24 hours compared with 81% at 34 weeks and 22% at 36 weeks (p < 0.001). At 32 weeks, 20% had neonatal sepsis compared with 11% at 34 weeks and 3% at 36 weeks (p < 0.001). At 32 weeks, 67% had respiratory distress syndrome compared with 44% at 34 weeks and 12% at 36 weeks (p < 0.001). CONCLUSION: In the setting of PPROM, later gestational age at delivery is associated with decreased rates of adverse neonatal outcomes without an increase in neonatal sepsis. KEY POINTS: · The ACOG recommends expectant management until 34 weeks for patients with PPROM.. · However, expectant management to 37 weeks might improve neonatal outcomes.. · Later gestational age at delivery was associated with decreased rates of adverse neonatal outcomes.. · Later gestational age at delivery was not associated with an increase in neonatal sepsis.. · The management of PPROM is complex and should be individualized..

Risk of adverse perinatal outcomes with violence in pregnancy.

PURPOSE: To examine the association between physical, sexual, or physiological harm in pregnancy and perinatal outcomes in a large, contemporary birth cohort. METHODS: This retrospective cohort study used California-linked vital statistics and hospital discharge data from 2016 to 2020. We included singleton, non-anomalous births with a gestational age of 23-42 weeks. Violence in pregnancy was identified using International Classification of Disease, Tenth Revision (ICD-10) codes. Chi-square tests and multivariable Poisson regression models were used to evaluate associations of violence in pregnancy with perinatal outcomes. RESULTS: A total of 1,728,478 pregnancies met inclusion criteria, of which 3,457 (0.2%) had reported violence in pregnancy. Compared to those without violence in pregnancy, individuals who experienced violence had an increased risk of non-severe hypertensive disorders (aRR = 1.36, 95% CI 1.22, 1.51), preeclampsia with severe features (aRR = 1.34; 95% CI 1.11, 1.61), chorioamnionitis (aRR = 1.68; 95% CI 1.48, 1.91), anemia (aRR = 1.59; 95% CI 1.50, 1.68), antepartum hemorrhage (aRR = 2.17; 95% CI 1.19, 3.95), and postpartum hemorrhage (aRR = 1.65; 95% CI 1.48, 1.85). Violence in pregnancy was also associated with increased risk of Apgar score < 7 at 5 min (aRR = 1.37; 95% CI 1.11, 1.71) and neonatal hypoglycemia (aRR = 1.26; 95% CI 1.07, 1.48). CONCLUSION: Violence experienced in pregnancy is associated with an increased risk of adverse perinatal outcomes. Understanding how universal screening and early recognition of violence in pregnancy may reduce disparities in maternal morbidity for this understudied population is critical.

Ovarian preservation compared to oophorectomy in premenopausal women with early-stage, low-grade endometrial Cancer: A cost-effectiveness analysis.

OBJECTIVES: Standard treatment for endometrial cancer is a hysterectomy, bilateral salpingo-oophorectomy, and lymph node assessment. In premenopausal women, removal of the ovaries may not be necessary and could increase the risk of all-cause mortality. We sought to estimate the outcomes, costs, and cost-effectiveness of oophorectomy versus ovarian preservation in premenopausal women with early-stage, low-grade endometrial cancer. METHODS: A decision-analytic model was designed using TreeAge software comparing oophorectomy to ovarian preservation in premenopausal women with early-stage, low-grade endometrial cancer. We used a theoretical cohort of 10,600 women to represent our population of interest in the United States in 2021. Outcomes included cancer recurrences, ovarian cancer diagnoses, deaths, rates of vaginal atrophy, costs, and quality-adjusted life years (QALYs). The cost-effectiveness threshold was set at $100,000/QALY. Model inputs were derived from the literature. Sensitivity analyses were conducted to evaluate the robustness of the results. RESULTS: Oophorectomy resulted in more deaths and higher rates of vaginal atrophy, while ovarian preservation resulted in 100 cases of ovarian cancer. Ovarian preservation resulted in lower costs and higher QALYs making it cost effective when compared to oophorectomy. Sensitivity analyses demonstrated the probability of cancer recurrence after ovarian preservation and probability of developing ovarian cancer were the most impactful variables in our model. CONCLUSION: Ovarian preservation is cost-effective in premenopausal women with early-stage, low-grade endometrial cancer when compared to oophorectomy. Ovarian preservation may prevent surgical menopause, which may improve quality of life and overall mortality without compromising oncologic outcomes, and should be strongly considered in premenopausal women with early stage disease.

Preventing eviction during pregnancy: a cost-effectiveness analysis of a theoretical safety-net program.

BACKGROUND: Eviction during pregnancy has been shown to be associated with adverse birth outcomes. A safety net program focused on covering the costs of rent during pregnancy may aid in preventing adverse complications. OBJECTIVE: This study aimed to evaluate the cost-effectiveness of a program covering the cost of rent to prevent eviction during pregnancy. STUDY DESIGN: A cost-effectiveness model using TreeAge software was designed to evaluate the cost, effectiveness, and incremental cost-effectiveness ratio associated with eviction compared to no eviction during pregnancy. The cost of eviction from a societal perspective was compared to the annual cost of housing in the no eviction group, which was estimated by the median contract rent in the United States from 2021 national census data. Birth outcomes included preterm birth, neonatal death, and major neurodevelopmental delay. Probabilities and costs were derived from the literature. The cost-effectiveness threshold was set at $100,000/QALY. We performed univariable and multivariable sensitivity analyses to assess the robustness of the results. RESULTS: In our theoretical cohort of 30,000 pregnant individuals aged 15 to 44 years facing eviction annually, the no eviction during pregnancy strategy was associated with 1427 fewer preterm births, 47 fewer neonatal deaths, and 44 fewer cases of neurodevelopmental delay compared to eviction. At the median cost of rent in the United States, the no eviction strategy was associated with increased quality-adjusted life-years and decreased costs. Therefore, the no eviction strategy was the dominant strategy. In univariate sensitivity analysis varying the cost of housing, no eviction remained the cost-effective strategy and was cost-saving when rent was below $1016 per month. CONCLUSION: The no eviction strategy is cost-effective and reduces cases of preterm birth, neonatal death, and neurodevelopmental delay. When rent is below the median of $1016 per month, no eviction is the cost-saving strategy. These findings suggest that policies supporting social programmatic implementation for rent coverage for pregnant people at risk of eviction have the potential to be highly beneficial in reducing costs and disparities in perinatal outcomes.

Latent phase duration and associated outcomes: a contemporary, population-based observational study.

BACKGROUND: Little is known about the latent phase of labor, including whether its duration influences subsequent labor processes or birth outcomes. OBJECTIVE: This study aimed to describe the duration of the latent phase of labor from self-report of the onset of painful contractions to a cervical dilation of 5 cm in a large, Swedish population and evaluate the association between the duration of the latent phase of labor and perinatal processes and outcomes that occurred during the active phase of labor, second stage of labor, birth and immediately after delivery, stratified by parity. STUDY DESIGN: This was a population-based cohort study of 67,267 pregnancies with deliveries between 2008 and 2020 in the Stockholm-Gotland Regions, Sweden. Nulliparous and parous women without a history of cesarean delivery in spontaneous labor with a term (≥37 weeks of gestation), singleton, live, and vertex fetus without major malformations were included. Imputation was used if the notation of the end of the latent phase of labor (ie, cervical dilation of 5 cm) was missing in the partograph. Multivariable logistic regression was used to estimate the association with adjusted odds ratios and 95% confidence intervals, controlling for potential covariates. RESULTS: Including the time from painful contraction onset to a cervical dilation of 5 cm, the median durations of the latent phase of labor were 16.0 (interquartile range, 10.0-26.6) hours for nulliparous women and 9.4 (interquartile range, 5.9-15.3) hours for multiparous women. The durations of the latent phase of labor beyond the median were associated with increased odds of labor dystocia diagnosis during the first stage active phase or second stage of labor and interventions commonly associated with dystocia (amniotomy, oxytocin augmentation, epidural, and cesarean delivery). The duration of the latent phase of labor of ≥90th percentile vs less than the median in nulliparous women demonstrated an increased risk of adverse neonatal outcomes (Apgar score of <7 at 5 minutes and neonatal intensive care unit admission), chorioamnionitis, and fetal occiput posterior. In multiparous women, longer duration of the latent phase of labor was associated with an increased risk of neonatal intensive care unit admission and chorioamnionitis but was not associated with an Apgar score of <7 at 5 minutes. The duration of the latent phase of labor was not associated with additional markers of maternal risk. CONCLUSION: The duration of the latent phase of labor in nulliparous women was longer than that of multiparous women at each point of distribution. A longer duration of the latent phase of labor was associated with more frequent dystocia diagnoses and related interventions during the first stage active phase or second stage of labor, including cesarean delivery, nulliparous fetal occiput posterior position, chorioamnionitis, and markers of neonatal morbidity. More research is needed to identify potential mediating paths between the duration of the latent phase of labor and neonatal morbidity.

Randomized controlled trial of prepregnancy lifestyle intervention to reduce recurrence of gestational diabetes mellitus.

BACKGROUND: Preconception lifestyle intervention holds potential for reducing gestational diabetes mellitus, but clinical trial data are lacking. OBJECTIVE: This study aimed to determine the effects of a prepregnancy weight loss intervention on gestational diabetes mellitus recurrence in women with overweight/obesity and previous gestational diabetes mellitus. STUDY DESIGN: A 2-site, randomized controlled trial comparing a prepregnancy lifestyle intervention with educational control was conducted between December 2017 and February 2022. A total of 199 English- and Spanish-speaking adults with overweight/obesity and previous gestational diabetes mellitus were randomized to a 16-week prepregnancy lifestyle intervention with ongoing treatment until conception or educational control. The primary outcome was gestational diabetes mellitus recurrence. Analyses excluded 6 participants who conceived but did not have gestational diabetes mellitus ascertained by standard methods. RESULTS: In the 63 (33%) women who conceived and had gestational diabetes mellitus ascertained (Ns=38/102 [37%] intervention vs 25/91 [28.0%] control; P=.17), those in the intervention group had significantly greater weight loss at 16 weeks compared with controls (4.8 [3.4-6.0] vs 0.7 [-0.9 to 2.3] kg; P=.001) and a greater proportion lost ≥5% of body weight (50.0% [17/34] vs 13.6% [3/22]; P=.005). There was no significant difference in the incidence of gestational diabetes mellitus recurrence between the intervention (57.9% [ns=23/38]) and the control group (44.0% [ns=11/25]; odds ratio, 1.8 [0.59-5.8]). Independent of group, greater prepregnancy weight loss predicted 21% lower odds of gestational diabetes mellitus recurrence (odds ratio, 0.79 [0.66-0.94]; P=.008). A ≥5% weight loss before conception reduced the odds of gestational diabetes mellitus recurrence by 82% (odds ratio, 0.18 [0.04-0.88]; P=.03). CONCLUSION: Lifestyle intervention produced considerable prepregnancy weight loss but did not affect gestational diabetes mellitus rates. Given that the conception rate was 50% lower than expected, this study was underpowered.

Optimal timing of delivery for growth restricted fetuses with gastroschisis: A decision analysis.

OBJECTIVE: Our objective was to determine the optimal timing of delivery of growth restricted fetuses with gastroschisis in the setting of normal umbilical artery (UA) Dopplers. METHODS: We designed a decision analytic model using TreeAge software for a hypothetical cohort of 2000 fetuses with isolated gastroschisis, fetal growth restriction (FGR), and normal UA Dopplers across 34-39 weeks of gestation. This model accounted for costs and quality adjusted life years (QALYs) for the pregnant individual and the neonate. Model outcomes included stillbirth, respiratory distress syndrome (RDS), necrotizing enterocolitis (NEC), intraventricular hemorrhage (IVH), short gut syndrome (SGS), neonatal sepsis, neonatal death, and neurodevelopmental disability (NDD). RESULTS: We found 38 weeks to be the optimal timing of delivery for minimizing overall perinatal mortality and leading to the highest total QALYs. Compared to 37 weeks, delivery at 38 weeks resulted in 367.98 more QALYs, 2.22 more cases of stillbirth, 2.41 fewer cases of RDS, 0.02 fewer cases of NEC, 1.65 fewer cases of IVH, 0.5 fewer cases of SGS, 2.04 fewer cases of sepsis, 11.8 fewer neonatal deaths and 3.37 fewer cases of NDD. However, 39 weeks were the most cost-effective strategy with a savings of $1,053,471 compared to 38 weeks. Monte Carlo analysis demonstrated that 38 weeks was the optimal gestational age for delivery 51.70% of the time, 39 weeks were optimal 47.40% of the time, and 37 weeks was optimal 0.90% of the time. CONCLUSION: Taking into consideration a range of adverse perinatal outcomes and cost effectiveness, 38-39 weeks gestation is ideal for the delivery of fetuses with gastroschisis, FGR, and normal UA Dopplers. However, there are unique details to consider for each case, and the timing of delivery should be individualized using shared multidisciplinary decision making.

Influence of Neighborhood Socioeconomic Status on Adverse Outcomes in Pregnancy.

PURPOSE: To evaluate whether ZIP-code level neighborhood socioeconomic status (SES) is associated with adverse pregnancy outcomes. METHODS: A retrospective study of 2009-2014 Oregon Health and Science University (OHSU) births with maternal ZIP codes in one of 89 Portland metropolitan area ZIP codes. Deliveries with ZIP codes outside of the Portland metro area were excluded. Deliveries were stratified by SES based on ZIP code median household income: low (below 10th percentile), medium (11th-89th percentile), and high (above 90th percentile). Univariate analysis and multivariable logistic regression with medium SES as the reference group evaluated perinatal outcomes and strength of association between SES and adverse events. RESULTS: This study included 8118 deliveries with 1654 (20%) classified as low SES, 5856 (72%) medium SES, and 608 (8%) high SES. The low SES group was more likely to be younger, have a higher maternal BMI, have increased tobacco use, identify as Hispanic or Black, and less likely to have private insurance. Low SES was associated with a significantly increased risk of preeclampsia (RR 1.23 95% CI 1.01-1.49), but this was no longer significant after adjusting for confounders (aRR 1.23 95% CI .971-1.55). High SES was negatively associated with gestational diabetes mellitus (GDM), even after adjusting for confounders (aRR 0.710, 95% CI 0.507-0.995). CONCLUSION: In the Portland metropolitan area, high SES was associated with a lower risk of GDM. Low SES was associated with a higher risk of preeclampsia before accounting for covariates. ZIP code-based risk assessment may be a useful indicator in detecting healthcare disparities.

Disparities in Trial of Labor among Women with Twin Gestations in the United States.

OBJECTIVE: The aim of the study is to examine clinical and demographic factors associated with trial of labor (TOL) among women with twin gestations eligible for a vaginal delivery. STUDY DESIGN: This was a population-based cohort study of women giving birth to twin gestations in the United States (2012-2014). Inclusion criteria for the analysis included live births greater than 23 weeks' gestation and a cephalic presenting twin. Women with prior cesarean delivery were excluded. Women were categorized by whether they underwent a TOL. Clinical and demographic characteristics associated with TOL status were evaluated using multivariable logistic regression analyses. Secondary analyses with stratification by parity and by second twin presentation were performed. RESULTS: Of 90,000 women eligible for inclusion, a minority (39.3%) underwent TOL. Women who had a greater gestational age at delivery were more likely to have a TOL. In contrast, several demographic factors were associated with decreased likelihood of TOL, including maternal age >35 years and identifying as Hispanic or Asian compared with non-Hispanic White. No differences in odds of TOL were observed for women who were identified as non-Hispanic Black versus non-Hispanic White, nor were other demographic factors such as marital status, insurance status, or educational attainment associated with undergoing TOL. Clinical factors associated with decreased odds of TOL included nulliparity, obesity, and hypertensive disorders of pregnancy. Results did not substantively change when stratified by parity or second twin presentation, nor did findings differ in the subgroup who delivered at 32 weeks of gestation or greater. CONCLUSION: In this large population of women with twins who were eligible for a TOL, a minority of individuals attempted a vaginal delivery. Demographic and clinical factors such as older maternal age, Asian or Hispanic racial or ethnic identification, nulliparity, and obesity are associated with decreased odds of undergoing TOL. KEY POINTS: · Understanding disparities in trial of labor among patients with twins is key to promoting equity.. · Older maternal age and identifying as Hispanic or Asian were associated with lower odds of TOL.. · Nulliparity, obesity, and hypertension were associated with decreased odds of TOL..

Considering Criteria for Active Phase Labor Management of Nulliparous Women: A Cost-Effectiveness Analysis.

OBJECTIVE: The aim of the study is to evaluate differences in maternal and neonatal outcomes based on updated criteria for defining active labor at 6 cm of cervical dilation and to determine if these recommendations are cost-effective. STUDY DESIGN: A decision-analytic model was built using TreeAge Pro 2020 software. We included maternal outcomes of mode of delivery, endometritis, postpartum hemorrhage requiring transfusion, and death. Neonatal outcomes included rates of shoulder dystocia and permanent brachial plexus injury. Costs and quality-adjusted life years (QALYs) were included from the maternal and infant perspectives. We used a willingness-to-pay threshold of $100,000 per QALY and all model inputs were subjected to sensitivity analysis. RESULTS: In a theoretical cohort of 1.4 million women, a threshold of 6 cm to define active labor resulted in 373,668 fewer cesarean deliveries, 33,181 fewer cases of endometritis, 143 fewer postpartum hemorrhages requiring transfusions, and seven fewer maternal deaths when compared with a threshold of 4 cm. However, there were higher rates of adverse neonatal outcomes, including 484 more cases of shoulder dystocia and 17 more instances of permanent brachial plexus injury. Using 6 cm as the threshold resulted in lower costs and greater effectiveness, making it a dominant strategy. Multivariate sensitivity analysis demonstrated the model was robust over a wide range of assumptions. CONCLUSION: In this model, considering 6 cm of cervical dilation as the threshold for the active phase of labor compared with 4 cm was a cost-effective strategy to prevent primary cesarean deliveries, lower costs, and improve maternal outcomes, despite associated increased adverse neonatal outcomes. KEY POINTSG: · Cervical dilation of 6 cm should be considered the threshold for the active phase of labor. This is a change from the prior definition of 4 cm.. · We built a theoretical model to compare outcomes and costs associated with the new active phase definition of 6 cm.. · Using a 6-cm threshold is a cost-effective strategy for decreasing primary cesarean deliveries..

Outcomes among Nulliparous Women Undergoing Nonmedically Indicated Induction of Labor at 39 Weeks Compared with Expectant Management Differ by Maternal Age.

OBJECTIVE: Prior studies have demonstrated the potential benefit of nonmedically indicated induction of labor for nulliparous women at 39 weeks of gestation, yet few have studied the impact of this management strategy in different maternal age groups on obstetric outcomes. We sought to assess whether obstetric outcomes among women undergoing nonmedically indicated induction of labor at 39 weeks of gestation as compared with expectant management vary based on maternal age. STUDY DESIGN: This was a retrospective cohort study of singleton, nonanomalous, deliveries between 2007 and 2012 in California. We defined nonmedically indicated induction of labor as induction of labor without a specific medical indication, and women with planned cesarean sections were excluded. We compared induction of labor with expectant management beyond the gestational age of induction and examined this comparison in different maternal age groups. Numerous maternal and neonatal outcomes were examined. Chi-squared and multivariable logistic regression analyses were used for statistical comparisons and a p-value of less than 0.05 was used to indicate statistical significance. RESULTS: A total of 630,485 women-infant dyads met our inclusion criteria and were included in this study. At 39 weeks' gestation, 6% of women underwent nonmedically indicated induction of labor and 94% underwent expectant management. Women 20 to 34 and ≥35 years old had lower odds of cesarean delivery if they underwent induction of labor. Women of all ages undergoing nonmedically indicated induction of labor had higher odds of operative vaginal delivery. Neonatal outcomes were better with nonmedically indicated induction of labor, including lower odds of neonatal intensive care unit admission and neonatal respiratory distress. CONCLUSION: Our study demonstrated that obstetric outcomes vary among women undergoing nonmedically indicated induction of labor compared with expectant management when stratified by maternal age. These findings illustrate the importance of understanding age-related differences in outcomes associated with nonmedically indicated induction of labor. KEY POINTS: · Outcomes are different by age with nonmedically indicated induction of labor (IOL).. · The odds of cesarean delivery with IOL decreases with increasing maternal age compared with expectant management.. · Neonatal outcomes were improved with IOL compared with expectant management..

Adverse Perinatal and Neonatal Outcomes among Adolescent Pregnancies in the United States.

OBJECTIVE: Despite a downward trend in recent years, adolescent pregnancies in the United States remain higher than any other western country. Adolescent pregnancies have been inconsistently associated with adverse perinatal outcomes. The objective of this study is to investigate the association between adolescent pregnancies and adverse perinatal and neonatal outcomes in the United States. STUDY DESIGN: This is a retrospective cohort study of singleton births in the United States from 2014 to 2020 using national vital statistics data. Perinatal outcomes included gestational diabetes, gestational hypertension, preterm delivery <37 weeks (preterm birth [PTB]), cesarean delivery (CD), chorioamnionitis, small for gestational age (SGA), large for gestational age (LGA), and neonatal composite outcome. Chi-square tests were used to compare outcomes among adolescent (13-19 years) versus adult (20-29 years) pregnancies. Multivariable logistic regression models were used to examine association of adolescent pregnancies with perinatal outcomes. For each outcome, we utilized three models: unadjusted logistic regression, adjusted for demographics, and adjusted for demographics and medical comorbidities. Similar analyses were used to compare younger (13-17 years) and older (18-19 years) adolescent pregnancies to adults. RESULTS: In a cohort of 14,014,078 pregnancies, we found that adolescents were at an increased risk of PTB (adjusted odds ratio [aOR]: 1.12, 99% confidence interval (CI): 1.12-1.13) and SGA (aOR: 1.02, 99% CI: 1.01-1.03) compared with adult pregnancies. We also found that multiparous adolescents with a prior history of CD were at an increased risk of CD, compared with adults. For all other outcomes, adult pregnancies were at higher risk for adverse outcomes in the adjusted models. When comparing birth outcomes among adolescents, we found that older adolescents are at an increased risk of PTB, whereas younger adolescents are at an increased risk of both PTB and SGA. CONCLUSION: After adjusting for confounders, our study demonstrates adolescents have an increased risk of PTB and SGA, compared with adults. KEY POINTS: · Adolescents as a whole subgroup have an increased risk of PTB and SGA compared with adults.. · Younger adolescents have a risk of PTB and SGA, whereas older adolescents have a risk of PTB only.. · Adverse birth outcomes in adults are gestational diabetes, chorioamnionitis, LGA, and worse neonatal composite score..

Hysterectomy with a general gynecologist vs gynecologic-oncologist in the setting of endometrial intraepithelial neoplasia: a cost-effectiveness analysis.

BACKGROUND: Standard treatment for patients with endometrial intraepithelial neoplasia (EIN) is a hysterectomy, which has a 43% risk of concomitant endometrial cancer on final pathology. General gynecologists and gynecologic-oncologists perform hysterectomies; however, patients who have a hysterectomy for EIN with a general gynecologist and are found to have cancer may require a second surgery by a gynecologic-oncologist to complete staging. There is ongoing discussion regarding whether patients with EIN should be provided the option to receive the initial hysterectomy with a gynecologic-oncologist. OBJECTIVE: This study aimed to better understand if patients with EIN should be initially referred to a gynecologic-oncologist for treatment. We examined the cost-effectiveness of hysterectomy by general gynecologists vs gynecologic-oncologists for patients with EIN. STUDY DESIGN: We created a decision-analytical model using TreeAge Pro software to compare outcomes between hysterectomies by general gynecologists and those by gynecologic-oncologists in patients with EIN. Our theoretical cohort contained 200,000 patients, an estimate of the number of individuals diagnosed with EIN each year in the United States. Outcomes included costs, quality-adjusted life years, primary lymph node dissection, secondary lymph node dissection, surgical site infection, and perioperative mortality. We assumed that surgical morbidity and mortality were the same under generalist and specialist care and applied costs of travel and lost work for those seeing a gynecologic-oncologist. We performed univariable sensitivity analyses and multivariable probabilistic sensitivity analysis to assess the model's robustness given the uncertainty of model inputs. RESULTS: In our theoretical cohort of 200,000 patients with EIN, hysterectomy with a gynecologic-oncologist was associated with a decrease of 10,811 second surgeries for lymph node dissection, 87 surgical site infections, and 9 perioperative mortalities. When hysterectomy was performed by a general gynecologist, 9 fewer patients had a lymph node dissection because of perioperative mortalities that occurred before lymph node dissection with a gynecologic-oncologist. Hysterectomy with a gynecologic-oncologist was the dominant, cost-effective strategy because it saved $116 million and increased quality-adjusted life years by 180. In our univariable analyses, hysterectomy with a gynecologic-oncologist was cost-saving and increased quality-adjusted life years over a wide range of probabilities and costs for lymph node dissection, surgical site infection, and perioperative mortality. However, hysterectomy with a gynecologic-oncologist was only a cost-effective and cost-saving strategy in just over 50% of multivariable simulations, demonstrating that there is significant uncertainty in the model's cost-effectiveness. CONCLUSION: In our model, hysterectomy with a gynecologic-oncologist for patients with EIN was associated with cost savings and increased quality-adjusted life years. Our study supports that patients undergoing hysterectomy for EIN at institutions using Mayo criteria to determine need for lymphadenectomy may benefit from surgery with a gynecologic-oncologist rather than a general gynecologist to reduce costs and adverse events associated with a second surgery.

Impact of pushing timing on occult injury of levator ani: secondary analysis of a randomized trial.

BACKGROUND: Evidence of detachment of the levator ani muscle system is seen more frequently in patients with pelvic floor disorders. It has been suggested that passive descent of the fetus before pushing could be used to decrease operative vaginal delivery and levator ani muscle injury. OBJECTIVE: This planned analysis aimed to determine whether immediate or delayed pushing was associated with an increased proportion of injury to the levator ani muscle system after the first delivery among nulliparous women. STUDY DESIGN: The Optimizing Management of the Second Stage study was a multicenter randomized trial. Nulliparous women with term pregnancies and neuraxial analgesia were randomly assigned at complete cervical dilation to either immediate pushing or delayed pushing for 1 hour. A subset of participants consented to longitudinal objective pelvic floor assessments: (1) during postpartum stay (initial), (2) at 6 weeks (postpartum 1), and (3) at 6 months (postpartum 2) with transperineal 3-dimensional ultrasound. Following the completion of all visits by all subjects, saved 3-dimensional ultrasound volumes were assessed in a masked fashion. The outcome was "occult" levator ani muscle injury on the right or left, defined as a widening of the attachment of the levator ani to its origin utilizing the levator-urethra gap measurement. Measurements and proportions were compared between the 2 groups by study visit using the χ2 test or Fisher exact test for categorical variables and the t test or Mann-Whitney U test for continuous variables as appropriate. RESULTS: Here, 941 of 2414 randomized subjects (39.0%) participated in the pelvic floor assessments: 452 in the immediate pushing group and 489 in the delayed pushing group. We obtained sonograms on 67%, 83%, and 77% of the pelvic floor assessment participants at the initial, postpartum 1, and postpartum-2 visits, respectively. Demographic and labor characteristics were comparable between the 2 groups; 94% of participants were non-Hispanic, and 50% of participants were Black. Levator ani muscle injury was noted in 77 participants (13.6%) at the initial visit, 99 (13.1%) at PP1, and 72 (10.6%) at PP2. There was no difference in injury between women in the immediate pushing group and women in the delayed pushing group. These findings did not change when the threshold (sensitivity) of levator ani muscle injury was adjusted to a less conservative measure. CONCLUSION: Among nulliparous women at term with neuraxial analgesia, the rates of occult levator ani muscle injury were not different between women undergoing immediate pushing and women undergoing delayed pushing in the second stage of labor. Further research efforts are needed to understand the development and potential prevention of subsequent pelvic floor disorders.

Severe maternal morbidity and other perinatal complications among women with physical, sensory, or intellectual and developmental disabilities.

BACKGROUND: Little is known about severe maternal morbidity (SMM) among women with disabilities. OBJECTIVE: We assessed differences in SMM and other perinatal complications by presence and type of disability. We hypothesised that SMM and other complications would be more common in births to women with disabilities than to women without disabilities. METHODS: We conducted a retrospective cohort study of California births from 2000 to 2012, using birth and death certificate data linked with hospital discharge data. We included singleton deliveries with gestational age of 23-42 weeks. We classified women as having any disability or not and identified disability type (physical, hearing, vision, intellectual/developmental disabilities [IDD]). Our primary outcome was a composite indicator of SMM. Secondary outcomes included additional perinatal complications: gestational hypertension, preeclampsia, gestational diabetes, venous thromboembolism, chorioamnionitis, puerperal endometritis and mental health disorders complicating pregnancy, childbirth or the puerperium. We used modified Poisson regression to obtain covariate-adjusted relative risks (RR) and 95% confidence intervals (CI) for the association of disability status and type with SMM and secondary outcomes. RESULTS: Of 5,787,090 deliveries, 33,044 (0.6%) were to women with disabilities. Of these, 311 per 10,000 were complicated by SMM, compared with 84 per 10,000 deliveries to women without disabilities. In multivariable analyses, risk of SMM for births to women with disabilities was nearly three times that for women without disabilities (RR 2.84, 95% CI 2.67, 3.02). Proportion and risk of SMM were greatest for vision disability (793 per 10,000; RR 4.04, 95% CI 3.41, 4.78). Secondary outcomes were also more common among women with disabilities. In particular, more than a third of births to women with IDD (37.4%) were complicated by mental health disorders (versus 2.2% for women without disabilities). CONCLUSION: As hypothesised, SMM and other perinatal complications were more common among women with disabilities than among women without disabilities.