Pregnancy Outcomes after Preeclampsia: The Effects of Interpregnancy Weight Change.

OBJECTIVE: This study aimed to examine the effects of interpregnancy weight change on pregnancy outcomes, including recurrent preeclampsia, preterm birth, small-for-gestational age (SGA), large-for-gestational age (LGA), and cesarean delivery, among women with a history of preeclampsia. We also evaluated whether these associations were modified by prepregnancy body mass index (BMI) category in the first pregnancy (BMI < 25 vs. ≥25 kg/m2) and if associations were present among women who maintained a healthy BMI category in both pregnancies. STUDY DESIGN: We conducted a population-based retrospective cohort study including 15,108 women who delivered their first two nonanomalous singleton live births in Missouri (1989-2005) and experienced preeclampsia in the first pregnancy. We performed Poisson regression with robust error variance to estimate relative risks and 95% confidence intervals for outcomes of interest after controlling for potential confounders. RESULTS: Interpregnancy weight gain was associated with increased risk of recurrent preeclampsia, LGA, and cesarean delivery. These risks increased in a "dose-response" manner with increasing magnitude of interpregnancy weight gain and were generally more pronounced among women who were underweight or normal weight in the first pregnancy. Interpregnancy weight loss exceeding 1 BMI unit was associated with increased risk of SGA among underweight and normal weight women, while interpregnancy weight loss exceeding 2 BMI units was associated with reduced risk of recurrent preeclampsia among overweight and obese women. CONCLUSION: Even small changes in interpregnancy weight may significantly affect pregnancy outcomes among formerly preeclamptic women. Appropriate weight management between pregnancies has the potential to attenuate such risks. KEY POINTS: · Interpregnancy weight change among formerly preeclamptic women significantly affects pregnancy outcomes.. · Interpregnancy weight gain is associated with increased risk of recurrent preeclampsia, large-for-gestational-age and cesarean delivery.. · Interpregnancy weight loss is associated with increased risk of small-for-gestational age and recurrent preeclampsia..

The Difference in Sibling Birthweight and Neonatal Death: A Population-Based Cohort Study.

BACKGROUND: There has been a call for customized rather than population-based birthweight standards that would classify smallness based on an infant's own growth potential. Thus, this study aimed to examine the association between the difference in sibling birthweight and the likelihood of neonatal death among second births in a U.S. STUDY DESIGN: This was a population-based cohort study including 179,300 women who delivered their first two nonanomalous singleton live births in Missouri (1989-2005). We performed binary logistic regression to evaluate the association between being relatively smaller than the elder full- or half-sibling (i.e., smaller by at least 500 g) and neonatal death (i.e., deaths in the first 28 days of life) among second births after controlling for sociodemographic and pregnancy-related variables in the second pregnancy. RESULTS: The adjusted odds of neonatal death were 2.54-times higher among second births who were relatively smaller than their elder sibling. Among relatively small second births, every 100-g increase in the difference in sibling birthweight was associated with a 13% increase in the odds of neonatal death. CONCLUSION: The deviation from the elder sibling's birthweight predicts neonatal death. Taking into consideration the elder sibling's birthweight may be warranted in clinical and research settings.

Gestational Weight Gain in the First Two Pregnancies and Perinatal Outcomes in the Second Pregnancy.

BACKGROUND: Gestational Weight Gain (GWG) below or above the Institute of Medicine (IOM) recommendations increases the risk of adverse pregnancy outcomes. However, it remains unknown whether the risk of adverse outcomes is affected by GWG in a previous pregnancy. We examined associations between GWG in the index (second) pregnancy and pregnancy outcomes, including preterm delivery and small for gestational age (SGA), while taking into consideration GWG in the first pregnancy. METHODS: In a population-based cohort study (n = 210 564), using the Missouri maternally-linked birth registry (1989-2005), we used multivariable Poisson regression with robust error variance stratified by prepregnancy body mass index (BMI) to evaluate associations between GWG in the index pregnancy and a composite indicator of GWG in the first and second pregnancies and our outcomes of interest, after controlling for sociodemographic and pregnancy-related confounders. RESULTS: Associations between GWG in the index pregnancy and pregnancy outcomes were moderated by GWG in the first pregnancy. Despite having GWG within recommendations in the index pregnancy, women had increased risk of preterm delivery and SGA if they had suboptimal GWG in their first pregnancy. Also, women having suboptimal GWG in the index pregnancy had increased risk of preterm delivery only if their GWG in the first pregnancy was also suboptimal. CONCLUSIONS: The observation that women who have GWG within recommendations in a current pregnancy may still have increased risk of adverse outcomes if they had suboptimal GWG in the first pregnancy has considerable clinical and public health implications.

Symptoms of anxiety and depression during pregnancy and their association with low birth weight in Chinese women: a nested case control study.

This study is a nested case control study from a population-based cohort study conducted in Wuhan, China. The aim is to estimate the association between symptoms of depression during pregnancy (DDP), anxiety during pregnancy(ADP), and depression with anxiety during pregnancy (DADP) and low birth weight (LBW) and to examine the extent to which preterm birth (PTB) moderates these associations. Logistic regression analyses were used to model associations between DDP, ADP, and DADP and LBW. Models were stratified by the presence or absence of PTB to examine moderating effects. From the cohort study, 2853 had a LBW baby (cases); 5457 pregnant women served as controls. Women with DDP or ADP only were not at higher risk of having a LBW baby, but DADP was associated with increased risk of LBW (crude OR 1.41, 95% CI 1.17-1.70; adjusted OR 1.29, 95% CI 1.07-1.57), and the significant association was particularly evident between DADP and LBW in PTB, but not in full-term births. Our data suggests that DADP is related to an increased risk of LBW and that this association is most present in PTBs.

The Effects of Race and Ethnicity on the Risk of Large-for-Gestational-Age Newborns in Women Without Gestational Diabetes by Prepregnancy Body Mass Index Categories.

Objectives Children born large for gestational age (LGA) are at risk of numerous adverse outcomes. While the racial/ethnic disparity in LGA risk has been studied among women with Gestational Diabetes Mellitus (GDM), the independent effect of race on LGA risk by maternal prepregnancy BMI is still unclear among women without GDM. Therefore, the objective of this study was to assess the association between maternal race/ethnicity and LGA among women without GDM. Methods This was a population-based cohort study of 2,842,278 singleton births using 2012 U.S. Natality data. We conducted bivariate and multivariate logistic regression analyses to assess the association between race and LGA. Due to effect modification by maternal prepregnancy BMI, we stratified our analysis by four BMI subgroups. Results The prevalence of LGA was similar across the different racial/ethnic groups at about 9%, but non-Hispanic Asian Americans had slightly higher prevalence of 11%. After controlling for potential confounders, minority women had higher odds of birthing LGA babies compared to non-Hispanic white women. Non-Hispanic Asian Americans had the highest odds of LGA babies across all BMI categories: underweight (aOR = 2.67; 95% CI: 2.24, 3.05); normal weight (aOR = 2.53; 2.43, 2.62); overweight (aOR = 2.45; 2.32, 2.60) and obese (aOR = 2.05; 1.91, 2.20). Conclusions for practice Racial/ethnic disparities exist in LGA odds, particularly among women with underweight or normal prepregnancy BMI. Most minorities had higher LGA odds than non-Hispanic white women regardless of prepregnancy BMI category. These racial/ethnic disparities should inform public health policies and interventions to address this problem.

Diet quality and sleep quality among day and night shift nurses.

AIMS: To determine whether night shift workers have a poorer diet quality and sleep quality when compared with day shift nurses. BACKGROUND: There is a dearth of research investigating the association between diet quality and sleep quality of day and night shift nurses. METHODS: Data on nurses (n = 103) working either a day or night shift from two Midwestern hospitals were obtained from August 2015 to February 2016. The instruments used were the Diet History Questionnaire and the Pittsburg Sleep Quality Index. Independent samples t-tests were used to examine differences in diet and sleep quality by work shift schedule. RESULTS: There were no statistically significant differences between nurses working day or night shift and sleep quality (P = 0.0684), as well as diet quality (P = 0.6499). There was a significant difference between both body mass index (P = 0.0014) and exercise (P = 0.0020) with regard to diet quality. Body mass index and sleep quality were also significantly associated (P = 0.0032). CONCLUSION: Our study found no differences between day and night shift with regard to sleep and diet quality among nurses. IMPLICATIONS FOR NURSING MANAGEMENT: Deliberate health initiatives and wellness programmes specifically targeting nurses are needed to increase knowledge about maintaining a healthy lifestyle while working as a nurse, whether it is day or night shift.

Racial disparity in the association between body mass index and self-reported asthma in children: a population-based study.

OBJECTIVE: To examine the racial disparity in the association between obesity and asthma in US children and adolescents. METHODS: This study was based on a nationally representative, random-digit-dial sample of US households with children less than 18 years of age from the National Survey of Children's Health in 2011/2012 and 2007. The study sample included 88,668 children ages 10-17 with data on body mass index (BMI), parental reporting of asthma diagnosis, and potential confounders. Multiple logistic regression analysis was performed to estimate the crude and adjusted odds ratios stratified by child race/ethnicity. RESULTS: The prevalence of overweight was 15.2% and obesity was 14.1%. Self-reported asthma diagnosis was 16.7% in our study sample. Obese children were 51% more likely to have asthma compared to normal weight children after controlling for child's sex, child age, socioeconomic status, environmental tobacco smoke (ETS), and neighborhood conditions. Our study also shows that the strength of this association varied by race/ethnicity after stratification. Being male, being non-Hispanic Black or Multi-racial, below the Federal Poverty Level, ETS and having detracting neighborhood elements were also significantly associated with higher odds of having a self-reported asthma diagnosis. CONCLUSION: We observed a racial difference in the association between BMI and asthma in US children. Our findings have significant public health implications and may help public health practitioners to target children and adolescents at higher risk of prevention and intervention efforts.

Racial/Ethnic Differences in the Correlates of Mental Health Services Use among Pregnant Women with Depressive Symptoms.

Objectives To examine correlates of lifetime mental health services (MHS) use among pregnant women reporting prenatal depressive symptoms by race/ethnicity. Methods This cross-sectional population-based study included 81,910 pregnant women with prenatal depressive symptoms using data from the Florida Healthy Start prenatal screening program (2008-2012). Multivariable logistic regression was conducted to ascertain adjusted odds ratios and corresponding 95 % confidence intervals for racial/ethnic differences in the correlates of lifetime MHS use. Results Findings of this study revealed racial/ethnic differences in MHS use among women with prenatal depressive symptoms, the highest rates being among non-Hispanic Whites and the lowest rates among Mexicans and other Hispanics. Most need for care factors, including illness, tobacco use, and physical or emotional abuse, consistently predicted MHS use across racial/ethnic groups after adjusting for covariates. Adjusted associations between predisposing and enabling/restricting factors and MHS use were different for different racial/ethnic groups. Conclusions Racial/ethnic differences in MHS use were found, with pregnant Hispanic women reporting prenatal depressive symptoms being the least likely to use MHS. Our study findings have significant public health implications for targeted intervention for pregnant women with prenatal depressive symptoms.

Prepregnancy body mass index in a first uncomplicated pregnancy and outcomes of a second pregnancy.

OBJECTIVE: This study examined the effect of body mass index (BMI) before a first uncomplicated pregnancy on maternal and fetal outcomes in a subsequent pregnancy, including preterm births, preeclampsia, cesarean delivery, small for gestational age, large for gestational age, and neonatal deaths. STUDY DESIGN: We conducted a population-based cohort study (n = 121,092) using the Missouri maternally linked birth registry (1989 through 2005). Multivariable binary logistic regression models were fit to estimate odds ratios and 95% confidence intervals for the parameters of interest after controlling for sociodemographic and pregnancy-related confounders in the second pregnancy. RESULTS: Compared to women with a normal BMI in their first pregnancy, those who were underweight prepregnancy had increased odds for preterm birth by 20% and small for gestational age by 40% in their second pregnancy, while those with prepregnancy obesity had increased odds for large for gestational age, preeclampsia, cesarean delivery, and neonatal deaths in their second pregnancy by 54%, 156%, 85%, and 37%, respectively. CONCLUSION: Women starting a first pregnancy with suboptimal BMI may be at risk of adverse maternal and fetal outcomes in a subsequent pregnancy, even if their first pregnancy was uncomplicated or if they reached a normal weight by their second pregnancy. The long-term consequences of suboptimal BMI carry considerable public health implications.

Cost analysis of tonsillectomy in children using medicaid data.

OBJECTIVE: To evaluate the cost-effectiveness of adenotonsillectomy (T&A) for adenotonsillar hypertrophy and recurrent tonsillitis through the use of Missouri Medicaid data. STUDY DESIGN: Children ages 2-16 years who had a diagnosis of adenotonsillar hypertrophy (based on medical claim codes) in 2006 (n = 4276) were included in this population-based study. The main outcome was direct total costs paid by Medicaid. Costs 2 years before and after T&A were compared in children who underwent surgical intervention with those who did not as well as costs comparison pre- and post-T&A. Wilcoxon rank-sum or Wilcoxon Signed-rank test was used for costs comparisons. RESULTS: Children with adenotonsillar hypertrophy who underwent T&A were significantly less likely to be African American. They had more adenotonsillar infections before undergoing T&A and greater total costs (median costs $2313 vs. $1945; P = .009). The median costs were $1228 pre-T&A, compared with $823 post-T&A (P < .0001). This reduction in costs of $405 (33%) compares with a median cost of the procedure of $1088. The reduction in costs was mostly because of less antibiotic use and outpatient visits. CONCLUSIONS: African American children have fewer T&A procedures for adenotonsillar hypertrophy than white children, which represents an unexplained racial disparity. Children with adenotonsillar hypertrophy who underwent T&A compared with those who did not had more adenotonsillar infections and greater health care costs. T&A leads to a reduction in costs that, after 2 years, is 37% of the costs of the procedure. Future studies should examine the effects of demographics, obesity, and disease severity on health care costs in children with adenotonsillar hypertrophy.

Prediction of cesarean delivery using the fetal-pelvic index.

OBJECTIVE: The purpose of this study was to estimate the usefulness of the fetal-pelvic index (FPI) in the prediction of cesarean delivery among nulliparous and women who undergo a trial of labor after cesarean delivery (TOLAC). STUDY DESIGN: This prospective cohort study included subjects at 2 hospitals from the University of Pennsylvania Health system. The study sample included nulliparous women and women who attempted TOLAC, with nonanomalous pregnancies at ≥37 weeks of gestation in vertex presentation (n = 221 and 207, respectively). FPI score was calculated with the ultrasound-based fetal biometric measures that were performed within 2 weeks of delivery and x-ray pelvimetry that was performed within 48 hours of delivery. Multivariable logistic regression was used to develop a clinical predictive index for cesarean delivery, which included FPI and clinical factors, in nulliparous women or women who attempted TOLAC. The prediction models were tested for accuracy with the area under the receiver operating characteristics curve. RESULTS: Higher FPI scores were associated with greater odds of cesarean delivery. A unit increase in FPI score increased the odds of cesarean delivery by 15% (adjusted odds ratio, 1.15; 95% confidence interval, 1.09-1.21) for nulliparous women and 15% for women who attempted TOLAC (adjusted odds ratio, 1.15; 95% confidence interval, 1.10-1.20) after adjustment for maternal age, race, medical risk factors, and labor method. Among nulliparous women, the receiver operating characteristics analysis estimated an area under the curve of 0.88, with positive and negative predictive values of 76% and 87%, respectively. Similar findings were observed in the subgroup of women who attempted TOLAC. CONCLUSION: The FPI when combined with clinical risk factors can identify accurately women who are at a high risk for cesarean delivery.

The moderating role of depression in the association between hypertension during pregnancy and birth outcomes.

OBJECTIVE: Investigate how hypertension during pregnancy (HDP) and depression during pregnancy (DDP) independently and jointly affect infant birth outcomes. METHODS: This population-based, retrospective cohort study included a sample of 68,052 women who participated in PRAMS 2016-2018 survey. Poisson regression was used for adjusted relative risks (aRRs). RESULTS: Compared to women without HDP and DDP, aRRs for PTB and LBW among women with both HDP and DDP are 2.04 (95% CI 1.73, 2.42) and 2.84 (95% CI 2.27, 3.56), respectively, albeit lower than the expected joint effect of risk. CONCLUSION: DDP may modify the association between HDP and PTB, LBW.

Racial/Ethnic Differences in the Association Between Food Security and Depressive Symptoms Among Adult Foreign-Born Immigrants in the US: A Cross-Sectional Study.

Foreign-born immigrants are at greater risks of both food insecurity and depressive symptoms, while the association between the two has yet to be elucidated. Our sample includes 6,857 adults aged 20 years and older from the National Health and Nutrition Examination Survey (NHANES) from 2005 to 2016. Multivariable logistic regression was used to examine whether the association between food security and depressive symptoms varies across race/ethnicity among US foreign-born immigrants. The prevalence of depressive symptoms was 9.6% and 15.7% for low food security (LFS) and very low food security (VLFS). The adjust odds ratios (aORs) of depressive symptoms among Mexican American and Other Hispanic immigrants with VLFS were 2.66 (95% Confidence interval [CI]: 1.61, 4.38) and 2.05 (95% CI: 1.08, 3.86) as compared to those with full food security (FFS). Race/ethnicity may modify the association between food security and depressive symptoms among US foreign-born immigrants and a dose-response relationship was indicated among Hispanic and Other Race immigrants.

Does a medical home influence the effect of low birthweight on health outcomes?

The objective of this study was to investigate the possible modifying effect of medical home on the association between low birthweight and children's health outcomes. The analytic sample included children 5 years and under from the 2007 National Survey of Children's Health whose mothers were the primary respondents and who had non-missing covariate information (n = 19,356). Controlling for sociodemographic factors, logistic and ordinal regression models estimated the presence of developmental, mental/behavioral or physical health outcomes, condition severity, and health status by birthweight, medical home, and their interaction. Prevalence estimates of physical, developmental, mental/behavioral and severe conditions among those with any conditions as well as fair/poor overall health were 8.9, 6.8, 2.4, 41.6, and 2.5 %, respectively. Overall, low compared to normal birthweight children had a higher prevalence of physical and developmental conditions and fair/poor health (15.2 vs. 8.3 %, 11.1 vs. 6.4 %, 4.5 vs. 2.3 %, respectively). Medical home did not significantly modify the effect of birthweight on health outcomes; however, prevalence of all outcomes was higher for children without a medical home. Adjusted models indicated that low birthweight children were almost twice as likely as normal birthweight children to have a physical or developmental condition and poorer overall health, regardless of having a medical home. Having a medical home was associated with equally improved health outcomes among normal and low birthweight children. Adequacy and frequency of medical home care should be investigated further, especially among low birthweight children.

Sleep habits are associated with cognition decline in physically robust, but not in frail participants: a longitudinal observational study.

Frail older adults are vulnerable to stressors; thus, sleep related cognition impairment might more greatly affect frail than healthy older adults. In the present study, we investigated whether the association between sleep problems and cognition varies with physical frailty status (modified from Fried et al.). Participants 55 years and older who completed a baseline and follow-up questionnaire (median follow-up: 5.5 years), were included in the analysis. Sleep parameters were evaluated in an interview at the baseline. Cognitive decline was defined as a loss of 3 or more points on the Mini-Mental State Examination (MMSE) at follow-up. Associations between sleep problems and cognitive decline were examined using logistic regression and were stratified by baseline physical frailty status, adjusted for potential confounders. A short total sleep duration (< 5 vs. 7-9 h, odds ratio (OR) = 1.88, 95% confidence interval (CI) 1.18-3.00), excessive daytime sleepiness (OR = 1.49, 95% CI 1.04-2.13), low sleep efficiency (< 65% vs. ≥ 85%, OR = 1.62, 95% CI 1.07-2.46), and insomnia complaints (OR = 2.34, 95% CI 1.23-4.43) were associated with MMSE decline in physically robust. The association was stronger for the sleep summary score, which summarized abnormal sleep duration, excessive daytime sleepiness, and insomnia complaints ([Formula: see text] 2 vs. 0, OR = 3.79, 95% CI 2.10-6.85, p < 0.0001). Due to the low prevalence of frailty in this community-dwelling population, the statistical power to detect an association was low. More evidence is needed to clarify the role of sleep in the progression of cognitive decline in frail individuals.

Adolescent pregnancy and gestational weight gain: do the Institute of Medicine recommendations apply?

OBJECTIVE: The purpose of this study was to examine the Institute of Medicine (IOM) guidelines for gestational weight gain in adolescents. STUDY DESIGN: We studied a retrospective cohort using the Missouri Birth Certificate Registry and included subjects who were primiparous, who had singleton gestations, who were <20 years old, and who delivered at 24-44 weeks gestation. The exposure was defined as weight gain less than, within, or greater than IOM recommendations. Outcomes that were examined were small-for-gestational-age (SGA) infants, large-for-gestational age (LGA) infants, preterm delivery, infant death, preeclampsia, cesarean delivery, and operative vaginal delivery. The analysis was stratified by body mass index category. RESULTS: In any body mass index category, inadequate weight gain was associated with increased odds of SGA infants, preterm delivery, and infant death. When subjects gained more than the IOM recommendations, the number of SGA infants decreased, with slight increases in the number of LGA infants, preeclampsia, and cesarean delivery. CONCLUSION: Adolescents should be counseled regarding adequate weight gain in pregnancy. Further research is necessary to determine whether the IOM recommendations recommend enough weight gain in adolescents to optimize pregnancy outcomes.

Does gestational weight gain affect the risk of adverse maternal and infant outcomes in overweight women?

OBJECTIVE: To examine the association between gestational weight gain and adverse maternal and infant outcomes among overweight women [body mass index (BMI) 26.0-29.0 kg/m(2)]. METHODS: A population-based cohort study using birth certificate data (1990-2004) from 34,143 singleton, full-term deliveries to nulliparous, Missouri residents ages 18-35. Gestational weight gain was divided into three categories: below Institute of Medicine (IOM) recommendations (<15 lbs), within IOM recommendations (15-25 lbs), and above IOM recommendations (>25 lbs). Categories of 10-lb increments were also evaluated. The primary outcomes were preeclampsia, cesarean section, macrosomia, low birth weight (LBW), and perinatal death. Adjusted relative risks and 95% confidence intervals (CI) were calculated using Mantel-Haenszel pooled estimator. RESULTS: Compared to women who gained 15-25 lbs, women who gained <15 lbs were 0.8 (95% CI 0.6-1.0), 0.9 (0.8-1.0), 0.6 (0.5-0.8), and 1.7 (1.4-2.2) times as likely to have preeclampsia, cesarean section, macrosomia, and LBW, respectively. Conversely, women who gained >25 lbs were 1.7 (1.5-1.9), 1.3 (1.2-1.4), 2.1 (1.9-2.3), and 0.6 (0.5-0.7) times as likely to have preeclampsia, cesarean section, macrosomia, and LBW, respectively. The lowest risk of adverse outcomes was for women who gained in the 6-14 and 15-24 lb categories. There was no association between gestational weight gain and perinatal death. CONCLUSIONS: Increasing gestational weight gain appears to decrease the risk of LBW but elevates the risks of preeclampsia, cesarean section, and macrosomia. Overweight women should gain within current IOM recommendations.

Birth outcomes of planned home births in Missouri: a population-based study.

We evaluated the birth outcomes of planned home births. We conducted a retrospective cohort study using Missouri vital records from 1989 to 2005 to compare the risk of newborn seizure and intrapartum fetal death in planned home births attended by physicians/certified nurse midwives (CNMs) or non-CNMs with hospitals/birthing center births. The study sample included singleton pregnancies between 36 and 44 weeks of gestation without major congenital anomalies or breech presentation ( N = 859,873). The adjusted odds ratio (aOR) of newborn seizures in planned home births attended by non-CNMs was 5.11 (95% confidence interval [CI]: 2.52, 10.37) compared with deliveries by physicians/CNMs in hospitals/birthing centers. For intrapartum fetal death, aORs were 11.24 (95% CI: 1.43, 88.29), and 20.33 (95% CI: 4.98, 83.07) in planned home births attended by non-CNMs and by physicians/CNMs, respectively, compared with births in hospitals/birthing centers. Planned home births are associated with increased likelihood of adverse birth outcomes.

Resilience buffers the effects of sleep problems on the trajectory of suicidal ideation from adolescence through young adulthood.

OBJECTIVES: To examine both the between-person and within-person effects of sleep problems on the trajectory of suicidal ideation from ages 14 to 22 and investigate whether resilience moderates the effects. Age and sex differences were explored in the main and interaction effects of sleep problems and resilience on suicidal ideation. METHODS: The study sample included 2491 adolescents (1260 males and 1231 females) who participated in a prospective study spanning 2009 through 2016 in northern Taiwan. Sex-stratified multilevel models were used to examine the between-person and within-person effects of sleep problems and the moderating effects of resilience on the trajectory of suicidal ideation in males and females. RESULTS: Across adolescents, higher levels of sleep problems contributed to an elevated risk of suicidal ideation for both sexes. Within individuals, a higher risk of suicidal ideation was observed when an adolescent's sleep problems exceeded their typical levels. The within-person effects of sleep problems were further determined to vary by age in males, with the effects gradually decreasing throughout late adolescence but increasing again in young adulthood. The buffering effects of resilience were only observed in females. The relationships between the within-person effects of sleep problems and suicidal ideation were only significant in female adolescents with low levels of resilience. CONCLUSIONS: Our findings extend the research by demonstrating both the between-person and within-person association between sleep problems and suicidal ideation. We further revealed age and sex differences in the within-person effects of sleep problems and the buffering effects of resilience. Prevention and intervention programs that target sleep problems could be tailored based on individuals' age, sex, and levels of resilience to prevent suicidal ideation.

Effect of interpregnancy interval after a first pregnancy complicated by placental abruption, on adverse maternal and fetal outcomes in a second pregnancy.

Background: For women who suffer from abruption in the first pregnancy, the extent to which birth spacing has an impact on maternal and fetal outcomes in a second pregnancy remains unclear.Objectives: To examine the effect of interpregnancy interval (IPI) after a first pregnancy complicated by placental abruption, on adverse maternal and fetal outcomes in a subsequent pregnancy.Study design: This was a population-based retrospective cohort study using maternally-linked Missouri birth registry from 1989 to 2005 (n = 2069). Exposure of interest was IPI and outcomes were placental abruption, preeclampsia, preterm birth, small for gestational age, cesarean delivery, and neonatal plus fetal deaths (neofetal death) in a second pregnancy. Logistic regressions were used to assess the association between IPI and the outcomes.Results: Compared with women with an IPI of 1-2 years, those with short IPI (<1 year) were more likely to experience preterm birth (aOR 3.01, 95% CI 1.71-5.28) and neonatal death (aOR 3.52, 95% CI 1.24-10.02) in their subsequent pregnancy. No significant associations between IPI and recurrent placental abruption or preeclampsia were detected.Conclusions: Women who become pregnant in less than a year's time of an initial placental abruption are at increased risk for preterm birth and neofetal death in a subsequent pregnancy. Other ischemic placental disease conditions are also shown to have serious health implications for a woman's next pregnancy.