The Log-Normal zero-inflated cure regression model for labor time in an African obstetric population.

In obstetrics and gynecology, knowledge about how women's features are associated with childbirth is important. This leads to establishing guidelines and can help managers to describe the dynamics of pregnant women's hospital stays. Then, time is a variable of great importance and can be described by survival models. An issue that should be considered in the modeling is the inclusion of women for whom the duration of labor cannot be observed due to fetal death, generating a proportion of times equal to zero. Additionally, another proportion of women's time may be censored due to some intervention. The aim of this paper was to present the Log-Normal zero-inflated cure regression model and to evaluate likelihood-based parameter estimation by a simulation study. In general, the inference procedures showed a better performance for larger samples and low proportions of zero inflation and cure. To exemplify how this model can be an important tool for investigating the course of the childbirth process, we considered the Better Outcomes in Labor Difficulty project dataset and showed that parity and educational level are associated with the main outcomes. We acknowledge the World Health Organization for granting us permission to use the dataset.

Maternal BMI at the time of birth and selected risk factors associated with severe neonatal outcomes: a secondary analysis of the WHO Better Outcomes in Labour Difficulty (BOLD) project.

The main objective of this secondary analysis was to describe the nutritional status of the Better Outcomes in Labour Difficulty (BOLD) project study population and determine possible associations between maternal nutritional status (as reflected by maternal BMI at the time of birth) and severe neonatal outcomes (SNO). We also analysed previous and index maternal pathologies to determine associations with neonatal outcomes. We used the classification designed by Atalah for maternal BMI and compared with the Hyperglycaemia and Adverse Pregnancy Outcome study one. To describe the nutritional status of this population, figures of distribution and test of normality related to weight and BMI were presented for the women and their babies. To explore the association between maternal BMI data and SNO, the χ2 test was performed. To identify a maternal characteristic or a group of characteristics that could predict SNO, we used Fisher's exact test using previous maternal pathology collected in the BOLD project as well as that in the index pregnancy. In this study, BMI at the time of birth was not associated with neonatal near miss or death. We found that previous maternal obesity, diabetes and chronic hypertension were associated with SNO. Maternal pathology in the index pregnancy such as other obstetric haemorrhage, pre-eclampsia, anaemia and gestational diabetes was associated with SNO.

Secondary analysis of the WOMAN trial to explore the risk of sepsis after invasive treatments for postpartum hemorrhage.

OBJECTIVE: To examine the association between the use of invasive treatments for postpartum hemorrhage and the risk of sepsis and severe sepsis. METHODS: Secondary data analysis of the WOMAN randomized controlled trial, including 20 060 women with postpartum hemorrhage in 21 countries. Logistic regression with random effects was used. RESULTS: The cumulative incidence was 1.8% for sepsis and 0.5% for severe sepsis. All-cause mortality was 40.4% in women with severe sepsis versus 2.2% for women without. After adjusting for bleeding severity and other confounders, intrauterine tamponade, hysterectomy, and laparotomy increased the risk of sepsis (aOR 1.77 [95% CI 1.21-2.59], P=0.004; aOR 1.97 [95% CI 1.49-2.65], P<0.001; and aOR 6.63 [95% CI 4.29-10.24], P<0.001, respectively) and severe sepsis (aOR 2.60 [95% CI 1.47-4.59], P=0.002; aOR 1.97 [95% CI 0.83-2.46], P=0.033; and aOR 5.35 [95% CI 2.61-10.98], P<0.001, respectively). CONCLUSION: In this secondary data analysis, certain invasive treatments for postpartum hemorrhage appear to increase the risk of sepsis. Further research is needed to confirm this finding and investigate the role of prophylactic antibiotics during these procedures. The harms and benefits of such interventions must be carefully weighed, both in treatment guidelines and during individual patient management. TRIAL REGISTRATION: ISRCTN76912190.

Progression of the first stage of spontaneous labour: A prospective cohort study in two sub-Saharan African countries.

BACKGROUND: Escalation in the global rates of labour interventions, particularly cesarean section and oxytocin augmentation, has renewed interest in a better understanding of natural labour progression. Methodological advancements in statistical and computational techniques addressing the limitations of pioneer studies have led to novel findings and triggered a re-evaluation of current labour practices. As part of the World Health Organization's Better Outcomes in Labour Difficulty (BOLD) project, which aimed to develop a new labour monitoring-to-action tool, we examined the patterns of labour progression as depicted by cervical dilatation over time in a cohort of women in Nigeria and Uganda who gave birth vaginally following a spontaneous labour onset. METHODS AND FINDINGS: This was a prospective, multicentre, cohort study of 5,606 women with singleton, vertex, term gestation who presented at ≤ 6 cm of cervical dilatation following a spontaneous labour onset that resulted in a vaginal birth with no adverse birth outcomes in 13 hospitals across Nigeria and Uganda. We independently applied survival analysis and multistate Markov models to estimate the duration of labour centimetre by centimetre until 10 cm and the cumulative duration of labour from the cervical dilatation at admission through 10 cm. Multistate Markov and nonlinear mixed models were separately used to construct average labour curves. All analyses were conducted according to three parity groups: parity = 0 (n = 2,166), parity = 1 (n = 1,488), and parity = 2+ (n = 1,952). We performed sensitivity analyses to assess the impact of oxytocin augmentation on labour progression by re-examining the progression patterns after excluding women with augmented labours. Labour was augmented with oxytocin in 40% of nulliparous and 28% of multiparous women. The median time to advance by 1 cm exceeded 1 hour until 5 cm was reached in both nulliparous and multiparous women. Based on a 95th percentile threshold, nulliparous women may take up to 7 hours to progress from 4 to 5 cm and over 3 hours to progress from 5 to 6 cm. Median cumulative duration of labour indicates that nulliparous women admitted at 4 cm, 5 cm, and 6 cm reached 10 cm within an expected time frame if the dilatation rate was ≥ 1 cm/hour, but their corresponding 95th percentiles show that labour could last up to 14, 11, and 9 hours, respectively. Substantial differences exist between actual plots of labour progression of individual women and the 'average labour curves' derived from study population-level data. Exclusion of women with augmented labours from the study population resulted in slightly faster labour progression patterns. CONCLUSIONS: Cervical dilatation during labour in the slowest-yet-normal women can progress more slowly than the widely accepted benchmark of 1 cm/hour, irrespective of parity. Interventions to expedite labour to conform to a cervical dilatation threshold of 1 cm/hour may be inappropriate, especially when applied before 5 cm in nulliparous and multiparous women. Averaged labour curves may not truly reflect the variability associated with labour progression, and their use for decision-making in labour management should be de-emphasized.

The communication and emotional support needs to improve women's experience of childbirth care in health facilities in Southwest Nigeria: A qualitative study.

OBJECTIVE: To improve women's childbirth experiences in health facilities, their psychosocial and communication needs have to be met. However, what constitutes these specific needs is poorly understood, particularly in Sub-Saharan Africa. This paper explores women's needs for communication and emotional support during facility-based childbirth. METHODS: Qualitative research was conducted in a large referral maternity hospital and its catchment communities in Akure, Nigeria. In-depth interviews (IDIs) and focus group discussions (FGDs) were conducted among women of reproductive age, midwives, doctors, and facility administrators. Thematic analysis was used to synthesize findings, and then interpreted within the context of this study and existing quality of care framework. RESULTS: Forty-two IDIs and 10 FGDs are included in this analysis. Participants reported such needs as communication in simple words in local language by healthcare staff, having their husbands as birth companions, spiritual support, and prayers from family members and healthcare providers. CONCLUSION: To increase, improve, and sustain facility-based childbirth in Nigeria, health systems should appreciate the uniqueness and importance of each woman's needs during childbirth. Practical and sustainable actions should be taken to meet these needs, within the confines of the acceptable sociocultural norms.

Negotiating quality standards for effective delivery of labor and childbirth care in Nigeria and Uganda.

OBJECTIVE: "Negotiated standards" describe a level of quality of care that is acceptable and achievable within a specific health system, based on consensus between key stakeholders. This paper presents the development of negotiated standards for effective labor and childbirth care in selected hospitals and communities in Nigeria and Uganda. METHODS: A four-step development process involving different methodologies. The process included: (1) review and synthesis of internationally recognized intrapartum clinical principles and practices; (2) primary qualitative research to assess values and preferences of women and healthcare providers, and practices that align with these preferences; (3) draft contextualization of effective and ineffective behaviors to reflect values and preferences; and (4) WHO-mediated negotiations between relevant stakeholders, including community members, providers, and administrators. RESULTS: The primary outcomes of this process were a comprehensive set of effective behaviors and clinical practices covering the main domains of quality of care, which are practical and easy to communicate, implement, and audit across all levels of healthcare delivery. CONCLUSION: The process demonstrates that health facilities and providers can be motivated to adopt standards of care that uphold the values and preferences of both service users and providers, while adhering to international best practices.

Accuracy of 50-g glucose challenge test to detect International Association of Diabetes and Pregnancy Study Groups criteria-defined hyperglycemia.

OBJECTIVES: To determine the accuracy of the 50-g glucose challenge test (GCT) in detecting hyperglycemia in pregnancy (HIP) across a range of glucose thresholds relative to the International Association of Diabetes and Pregnancy Study Groups diagnostic criteria, and to determine the accuracy of the 50-g GCT among patients with different risk status. METHODS: The present prospective cohort study included women aged 18-45 years at 24-31+6  weeks of pregnancy who presented at the Mother and Child Hospital, Akure, Nigeria, between September 1, 2015, and February 29, 2016. Patients underwent the 50-g GCT followed by the 75-g oral glucose tolerance test (OGTT). The accuracy of different 50-g GCT thresholds in diagnosing HIP was assessed based on International Association of Diabetes and Pregnancy Study Groups diagnostic criteria, with the 75-g OGTT used as a clinical reference standard. RESULTS: Of 280 patients enrolled, 46 (16.4%) had HIP. The sensitivity of the 50-g GCT to detect HIP decreased from 47.8% (95% confidence interval [CI], 32.9-63.1) at a 7.2-mmol/L threshold to 32.6% (95% CI, 19.5-48.0) at a 8.0-mmol/L threshold; the specificity improved from 84.2% (95% CI, 78.9-88.6) to 95.3% (95% CI, 91.7-97.6), respectively. CONCLUSION: The 50-g GCT performed poorly compared with the 75-g OGTT for detecting HIP. It appears to be an unsuitable replacement for the 75-g OGTT.

Endometriosis and associated symptoms among Nigerian women.

OBJECTIVE: To determine the prevalence of endometriosis and identify associated symptoms among Nigerian women. METHODS: A cross-sectional study was conducted at a center in Ibadan, Nigeria, between October 2008 and December 2010. All women aged 18-45 years scheduled for their first diagnostic laparoscopy for gynecologic indications were enrolled. Participants completed a previously validated self-administered questionnaire. Endometriosis was diagnosed on the basis of visual evidence. RESULTS: Among 239 women analyzed, 115 (48.1%) had endometriotic lesions. Endometriosis was more common among women reporting dysmenorrhea and pelvic pain than among those not reporting these symptoms (20/28 [71.4%] vs 95/211 [45.0%]; P=0.009). Women who reported dysmenorrhea were significantly more likely to have endometriosis than were those without dysmenorrhea (90/171 [52.6%] vs 25/68 [36.8%]; P=0.027). The risk of endometriosis was not significantly increased in women with one pain symptom (odds ratio [OR]1.69; 95% confidence interval [CI] 0.67-4.27), but was significantly increased in women with two (OR 2.70; 95% CI 1.13-6.52) or three (OR 4.87; 95% CI 1.88-12.82) pain symptoms (χ(2)trend=15.5; P<0.001). In a multivariate logistic regression model, only pain other than dysmenorrhea or dyspareunia independently predicted endometriosis (P=0.017). CONCLUSION: Endometriosis is fairly common among Nigerian women. Efforts to increase the awareness of endometriosis among the public, researchers, and clinicians are needed.