Overview of current state of research on pregnancy outcomes in minority populations

Resident Versus Attending Prenatal Care Models: an Analysis of the Effects of Race and Insurance on Appointment Attendance

OBJECTIVE

To describe patient differences by prenatal care (PNC) model and identify factors that interact with race to predict more attended prenatal appointments, a key component of PNC adherence.

METHODS

This retrospective cohort study used administrative data targeting prenatal patient utilization from two OB clinics with different care models (resident vs. attending OB) from within one large midwestern healthcare system. All appointment data among patients receiving prenatal care at either clinic between September 2, 2020, and December 31, 2021, were extracted. Multivariable linear regression was performed to identify predictors of attended appointments within the resident clinic, as moderated by race (Black vs. White).

RESULTS

A total of 1034 prenatal patients were included: 653 (63%) served by the resident clinic (appointments = 7822) and 381 (38%) by the attending clinic (appointments = 4627). Patients were significantly different across insurance, race/ethnicity, partner status, and age between clinics (p < 0.0001). Despite prenatal patients at both clinics being scheduled for approximately the same number of appointments, resident clinic patients attended 1.13 (0.51, 1.74) fewer appointments (p = 0.0004). The number of attended appointments was predicted by insurance in crude analysis (β = 2.14, p < 0.0001), with effect modification by race (Black vs. White) in final fitted analysis. Black patients with public insurance attended 2.04 fewer appointments than White patients with public insurance (7.60 vs. 9.64) and Black non-Hispanic patients with private insurance attended 1.65 more appointments than White non-Hispanic or Latino patients with private insurance (7.21 vs. 5.56).

CONCLUSION

Our study highlights the potential reality that the resident care model, with more care delivery challenges, may be underserving patients who are inherently more vulnerable to PNC non-adherence at care onset. Our findings show that patients attend more appointments at the resident clinic if publicly insured, but less so if they are Black than White.

The Benefits of Introducing a Pregnancy Support Tool for Low-Income Women During Routine Obstetrics Care

The objective of the CONTINUE (conversations in routine OB care) pilot study was to gather preliminary data on the benefits of integrating a well-designed pregnancy support tool ("CONTINUE Tool") in low-income prenatal care. A total of 184 tools were distributed by 21 OB providers during the study implementation period. Follow-up data were collected from 71 (38.5%) prenatal patients across three community-based midwestern OB clinics serving a diverse prenatal patient population. Early-gestation prenatal patients received the strategically designed CONTINUE Tool during routine prenatal care and later completed a semi-structured interview or electronic survey to report pre-determined individual benefit items experienced due to tool usage. Factor analysis used individual benefit items to identify factors representing common underlying benefits ("factor benefits"). Logistic regression analyses were performed to describe the relative odds of participants with low income (public insurance) experiencing individual and factor benefits of tool use compared to participants of higher income (private insurance). Chi square tests (or Fisher's exact tests) were performed to generate P values reflecting statistically significant differences by income group. More low-income prenatal participants reported experiencing individual benefits as compared to higher-income participants. Among factor benefits, low-income participants were statistically more likely to report experiencing a time-related logistics benefit (OR = 4.00; 95% CI 1.02-15.73; P = .045). Low-income participants reported experiencing an overall logistics factor benefit (OR = 4.29; 95% CI 0.47-38.75), including a cost-related logistics benefit (OR = 3.08; CI 0.59-16.00), as well as an understanding benefit (OR = 1.90; 95% CI 0.72-5.04) and a self-efficacy benefit (OR = 1.30; 95% CI 0.44-3.87). While this study is limited by sample size due to being a pilot study, the findings suggest there may be tangible benefits to introducing the CONTINUE Tool among low-income prenatal patients. Given the staggering inequity in OB care and subsequent health outcomes, any preliminary findings on ways to help combat this are necessary and should lay the groundwork for subsequent randomized trials. Our preliminary findings show that supplementing routine OB care with the CONTINUE Tool can confer benefits to both providers and patients, but particularly for low-income prenatal patients who tend to have more structural barriers to adequate care in the first place.

Personal Versus Group Experiences of Racism and Risk of Delivering a Small-for-Gestational Age Infant in African American Women: a Life Course Perspective

The majority of studies investigating the relationship between racism/racial discrimination and birth outcomes have focused on perceived experiences of racism/racial discrimination directed at oneself (personal racism). However, evidence suggests individuals report with greater frequency racism/racial discrimination directed at friends, family members, or other members of their racial/ethnic group (group racism). We examined how much African American (AA) women report lifetime experiences of perceived racism or racial discrimination, both personal and group, varied by maternal age. We also investigated whether reports of personal and group racism/racial discrimination were associated with the risk of delivering a small-for-gestational age (SGA) infant and how much maternal age in relation to developmental life stages (adolescence [≤ 18 years], emerging adulthood [19-24 years], and adulthood [≥ 25 years]) moderated the relationship. Data stem from the Baltimore Preterm Birth Study, a hybrid prospective/retrospective cohort study that enrolled 872 women between March 2000 and July 2004 (analyzed in 2016-2017). Spline regression analyses demonstrated a statistically significant (p value for overall association < 0.001) and non-linear (p value = 0.044) relationship between maternal age and the overall racism index. Stratified analysis showed experiences of racism overall was associated with a higher odds ratio of delivering an SGA infant among AA women aged ≥ 25 years (OR = 1.45, 95% CI 1.02-2.08). The overall racism index was not associated with the SGA infant odds ratio for emerging adults (OR = 0.86, 95% CI 0.69-1.06) or adolescents (OR = 0.92, 95% CI 0.66-1.28). Multiple aspects of racism and the intersection between racism and other contextual factors need to be considered.

CRH as a Predictor of Preterm Birth in Minority Women

OBJECTIVE

To determine the predictive capability of corticotropin-releasing hormone (CRH) as a biomarker of preterm birth (PTB) in minority women.

STUDY DESIGN

Venous blood samples were obtained at 22-24 weeks' gestation in a prospective, descriptive study of 707 minority women experiencing low-risk pregnancies. CRH was analyzed using a radioimmunoassay and methanol extraction protocol.

RESULT

CRH predicted PTB in both African American and Hispanic women. The odds ratio was 1.8 times greater for having a PTB if the CRH level was >24 pg/ml. The median CRH for African American women having a PTB was 46.6 pg/ml and for Hispanic women was 35.03 pg/ml. Using a receiver-operating characteristic curve, the threshold for CRH among the African American women was 30.6 pg/ml and among the Hispanic women was 27.4 pg/ml.

CONCLUSION

CRH may be an important biomarker for predicting PTB in minority women, especially when combined with other predictors.

Using a life course model to examine racial disparities in low birth weight during adolescence and young adulthood

INTRODUCTION

This study examined relationships between health, social, environmental, and economic factors during adolescence and the subsequent risk of giving birth to a low-birth-weight (LBW) infant, to inform strategies for reducing racial disparities in LBW.

METHODS

Data were derived from the National Longitudinal Study of Adolescent Health. A sample of 1213 adolescents, reporting on first pregnancies, was created with 35% black, non-Hispanic (black) and 65% white, non-Hispanic (white) participants. Independent variables were from the domains of individual characteristics, health status, access to care, and social environment. The dependent variable was low birth weight. Overall and race-specific logistic regression models were estimated.

RESULTS

Black women had 1.9 times the odds of giving birth to an LBW infant as white women. Factors associated with LBW differed between black women and white women. Black women with a history of hypertension were 6 times more likely to have an LBW infant. Intimate partner support during prenatal care was protective for black women. Factors associated with an increased risk of giving birth to an LBW infant for white women included an intergenerational pattern of LBW, low body mass index during adolescence, and smoking during pregnancy. Socioeconomic factors during adolescence did not predict the odds of having an LBW infant for either group, except for white women whose parents had less than a high school education and black women living in medium-poverty neighborhoods.

DISCUSSION

Findings suggest that strategies to reduce racial disparities should address the specific needs of the population being served over the life course.

Developing a maternally linked birth dataset to study the generational recurrence of low birthweight in Virginia

This paper examined the generational recurrence of low birthweight (LBW) among first-born singletons using a statewide maternally-linked birth dataset. An intergenerational dataset was created by linking 2005-2009 to 1960-1997 Virginia resident live birth data. Maternal information from the recent birth cohort was linked to infant information in the historic birth file using various combinations of mother's name and birthdate. The linked dataset contained 170,624 records (87 % of all eligible records). The analysis dataset was limited to non-Hispanic black and non-Hispanic white first-born singleton infants linked to their mother's own birth record (n = 69,702). Maternal birthweight was a significant predictor of LBW for first-born singletons. The birthweight distribution for both non-Hispanic black and non-Hispanic white infants was shifted toward lower birthweights for infants whose mothers were born LBW. Even after adjusting for known maternal risk factors in the current pregnancy, non-Hispanic black (AOR = 1.6 [95 % CI 1.4, 1.8]) and non-Hispanic white (AOR = 2.0 [95 % CI 1.8, 2.3]) infants had increased odds of being born LBW if their mother was born LBW. A mother's early life experiences can impact the health of her children. These findings underscore the importance of applying a life course perspective to the prevention of LBW. Routine linkage of maternal and infant birth data is needed to strengthen the evidence base for policies and programs that address issues affecting maternal and child health throughout the life course.

Measuring coping in pregnant minority women

Coping strategies may help explain why some minority women experience more stress and poorer birth outcomes, so a psychometrically sound instrument to assess coping is needed. We examined the psychometric properties, readability, and correlates of coping in pregnant Black (n = 186) and Hispanic (n = 220) women using the Brief COPE. Exploratory and confirmatory factor analysis tested psychometric properties. The Flesch-Kincaid Reading Level test assessed readability. Linear regression models tested correlates of coping. Findings suggested two factors for the questionnaire: active and disengaged coping, as well as adequate reliability, validity, and readability level. For disengaged coping, Cronbach's α was .78 (English) and .70 (Spanish), and for active coping .86 (English) and .92 (Spanish). A two group confirmatory factor analysis revealed both minority groups had equivalent factor loadings. The reading level was at the sixth grade. Age, education, and gravidity were all found to be significant correlates with active coping.

Racial and ethnic health disparities in reproductive medicine: an evidence-based overview

Racial and ethnic health disparities in reproductive medicine exist across the life span and are costly and burdensome to our healthcare system. Reduction and ultimate elimination of health disparities is a priority of the National Institutes of Health who requires reporting of race and ethnicity for all clinical research it supports. Given the increasing rates of admixture in our population, the definition and subsequent genetic significance of self-reported race and ethnicity used in health disparity research is not straightforward. Some groups have advocated using self-reported ancestry or carefully selected single-nucleotide polymorphisms, also known as ancestry informative markers, to sort individuals into populations. Despite the limitations in our current definitions of race and ethnicity in research, there are several clear examples of health inequalities in reproductive medicine extending from puberty and infertility to obstetric outcomes. We acknowledge that socioeconomic status, education, insurance status, and overall access to care likely contribute to the differences, but these factors do not fully explain the disparities. Epigenetics may provide the biologic link between these environmental factors and the transgenerational disparities that are observed. We propose an integrated view of health disparities across the life span and generations focusing on the metabolic aspects of fetal programming and the effects of environmental exposures. Interventions aimed at improving nutrition and minimizing adverse environmental exposures may act synergistically to reverse the effects of these epigenetic marks and improve the outcome of our future generations.

Intimate partner violence, substance use, and adverse neonatal outcomes among urban women

OBJECTIVE

To assess the prevalence of intimate partner violence, substance use, and their co-occurrence during pregnancy and to examine their associations with adverse neonatal outcomes.

STUDY DESIGN

Between February 2009-February 2010, pregnant women receiving obstetrical care at 3 urban clinics were screened for intimate partner violence and substance use between 24-28 weeks gestation. A chart review was conducted upon delivery to assess for adverse neonatal outcomes of low birth weight, preterm birth, and small for gestational age (SGA).

RESULTS

Maternal and neonatal data were collected on 166 mothers and their neonates. Overall, 19% of the sample reported intimate partner violence during their pregnancies. Of the study's neonates, 41% had at least 1 adverse neonatal outcome. Nearly one-half of the mothers reported using at least 1 substance during pregnancy. Women experiencing intimate partner violence had a higher prevalence of marijuana use than their nonabused counterparts (P < .01). Experiencing intimate partner violence was associated with a 4-fold increase in having a SGA neonate (aOR = 4.00; 95% CI 1.58-9.97). Women who reported marijuana use had 5 times the odds of having a neonate classified as SGA (aOR = 5.16, 95% CI 2.24-11.89) or low birth weight (aOR 5.00; 95% CI 1.98-12.65).

CONCLUSIONS

The prevalence of intimate partner violence during pregnancy and substance use is high in urban mothers, the risks of which extend to their neonates. Pediatric providers are urged to routinely screen for both issues and recognize the impact of co-occurrence of these risk factors on poor neonatal and childhood outcomes.

African American Women's Preparation for Childbirth From the Perspective of African American Health-Care Providers

Preparation for birthing has focused primarily on Caucasian women. No studies have explored African American women's birth preparation. From the perceptions of 12 African American maternity health-care providers, this study elicited perceptions of the ways in which pregnant African American women prepare for childbirth. Focus group participants answered seven semistructured questions. Four themes emerged: connecting with nurturers, traversing an unresponsive system, the need to be strong, and childbirth classes not a priority. Recommendations for nurses and childbirth educators include: (a) self-awareness of attitudes toward African Americans, (b) empowering of clients for birthing, (c) recognition of the role that pregnant women's mothers play, (d) tailoring of childbirth classes for African American women, and (e) research on how racism influences pregnant African American women's preparation for birthing.

Ethnicity and newborn outcomes: the case of African American women

PURPOSE

Although previous studies have confirmed the relationship between socioeconomic status, ethnicity, education, and occupation on birth outcomes, less is known about the relationship of providers influence or hospital characteristics on birth outcomes for minority women. It is not well understood whether hospital or physician characteristics exert an equal or greater affect compared with maternal sociodemographic factors, particularly for Black childbearing women known to be at particular risk for adverse birth outcomes.

DESIGN

This retrospective descriptive study sought to determine whether variation in neonatal birth outcomes for Black women was attributable to hospital characteristics, physician influence, or patient sociodemographics.

METHODS

Fixed and random effects were conducted to empirically determine the relative importance of hospital, physician, and patient characteristics (partitioning the variation of differences in birth outcome to each component) using a large administrative dataset.

FINDINGS

Considerable variability existed among hospitals over and above hospital ownership or number of hospital beds.

CONCLUSIONS

Ethnicity was a statistically significant predictor of adverse outcomes, as was the number of prenatal visits and maternal education. There is a significant relationship between adverse newborn outcomes and ethnicity after controlling for hospital and physician characteristics.

CLINICAL RELEVANCE

Ongoing birth disparities in African American childbearing women are a significant public policy issue with important research and clinical implications. This research adds to nursing knowledge by helping eliminate some factors previously thought to have contributed to the high incidence of perinatal complications for African American women and their newborns.

Ethnic variations in mortality in pre-school children in Denmark, 1973-2004

The objective of the study was to describe ethnic differences in under-five-years mortality in Denmark according to maternal country of origin. We conducted a large registry-linkage study of all singleton live-born children from mothers born in Denmark and from the ten largest migrant groups (n = 1,841,450). Study outcomes were death before the age of 5 years from all causes combined and the most frequent death causes. Results showed that children of mothers of Turkish, Pakistani, Somali and Iraqi origin had an elevated risk of dying before the age of five compared to offspring of mothers born in Denmark, with hazards ratios and 95% confidence intervals of 1.48 (1.31-1.67), 1.97 (1.68-2.32), 1.70 (1.29-2.25), and 1.92 (1.41-2.62), respectively. Ethnic differences were also observed in the underlying causes of death. Children of mothers born in Former Yugoslavia, Lebanon, Norway, Sweden, Iran, and Afghanistan did not differ in under-five-years mortality from ethnic Danish children. Adjustments for household income did not attenuate the risk estimates. In conclusion, we found excess child mortality in some migrant groups, but not in all. The differences could not be explained by socioeconomic status.

Do foreign- and U.S.-born mothers across racial/ethnic groups have a similar risk profile for selected sociodemographic and periconceptional factors?

BACKGROUND

We examined differences in selected pregnancy-related risk factors, including maternal sociodemographic characteristics, health-related conditions, and periconceptional behavioral factors, among foreign-born versus U.S.-born control mothers across race/ethnic groups.

METHODS

We used data from the National Birth Defects Prevention Study, and calculated odds ratios (ORs) and 95% confidence intervals (CIs) of the risk factors, for foreign-born Hispanic, non-Hispanic white, non-Hispanic black, and Asian/Pacific Islander (API) mothers, compared to their U.S.-born counterparts.

RESULTS

Across all race/ethnic groups, foreign-born mothers were older and had lower odds of obesity compared to their U.S.-born counterparts. With the exception of foreign-born black mothers, foreign-born mothers from other race/ethnic groups had significantly lower odds of binge drinking during the periconceptional period. Compared to U.S.-born, foreign-born Hispanic mothers had twice the odds of gestational diabetes (OR = 2.23; 95% CI = 1.36-3.66). Certain health behaviors were less prevalent in foreign-born black mothers (e.g., folic acid use; OR = 0.54; 95% CI = 0.31-0.96) and foreign-born API mothers (e.g., cigarette smoking; OR = 0.10; 95% CI = 0.02-0.48).

CONCLUSIONS

Significant differences in pregnancy related risk factors during the periconceptional period and throughout pregnancy were observed between maternal nativity groups and across race/ethnicity. Prevention efforts for both prepregnancy and after conception should be designed and delivered according to maternal nativity for each racial/ethnic group.

Cardiovascular risk factors prior to conception and the length of pregnancy: population-based cohort study

OBJECTIVE

To study the association of prepregnancy blood pressure, lipids, and glucose with length of pregnancy, and to assess whether the association between preterm delivery and later maternal cardiovascular disease may be due to common risk factors.

STUDY DESIGN

Prospective study linking information of 3506 women in the HUNT Study with 4990 singleton births recorded in the Medical Birth Registry of Norway.

RESULTS

Unfavorable prepregnancy levels of triglycerides, cholesterol, high-density lipoprotein-cholesterol, and glucose were associated with increased risk of preterm birth and shorter gestational length. Triglycerides above 1.6 mmol/L were associated with 60% higher risk of preterm birth (odds ratio, 1.6, 95% confidence interval, 1.0-2.5), compared with triglycerides below 0.7 mmol/L. Blood pressure was positively associated with risk of preterm birth and shorter gestational length, but these associations were substantially attenuated after adjustment for hypertensive disorders in pregnancy.

CONCLUSION

Women with unfavorable cardiovascular risk factors before conception have excess risk of preterm birth.

Process evaluation of a multiple risk factor perinatal programme for a hard-to-reach minority group

AIM

This article is a report of an evaluation of a multiple risk factor perinatal programme tailored to ethnic Turkish women in the Netherlands.

BACKGROUND

The programme was directed at multiple risk factors and aimed at improving maternal lifestyle, infant care practices and psychosocial health during pregnancy and after delivery. The programme was carried out by ethnic Turkish community health workers in collaboration with midwives and physiotherapists.

METHODS

Our multiple case study included three Parent-Child Centres providing integrated maternity and infant care. Participants (n = 119) were first and second generation pregnant ethnic Turkish women with relatively unfavourable risk profiles. Data were collected between 2005 and 2008 using mixed methods, including field notes, observations and recordings of group classes, attendance logs, semi-structured individual interviews, a focus group interview, and structured questionnaires.

FINDINGS

Most participants (82%) were first generation ethnic Turkish; 47% had a low educational level; 43% were pregnant with their first child; and 34% had a minimal knowledge of the Dutch language. The community health workers' Turkish background was vital in overcoming cultural and language barriers and creating a confidential atmosphere. Participants, midwives and health workers were positive about the programme. Midwives also observed improvements of knowledge and self-confidence amongst the participants. The integration of the community health workers into midwifery practices was crucial for a successful programme implementation.

CONCLUSIONS

A culturally sensitive perinatal programme is able to gain access to a hard-to-reach minority group at increased risk for poor perinatal health outcomes. Such a programme may be well received and potentially effective.

Challenges and priorities for surveillance of stillbirths: a report on two workshops

Stillbirths, those with and without birth defects, are an important public health topic. The National Center on Birth Defects and Developmental Disabilities at the Centers for Disease Control and Prevention conducted two workshops during April and July 2005. Both workshops explored the challenges of conducting surveillance of stillbirths. Workshop participants considered an approach that added the surveillance of stillbirths, those with and without birth defects, as part of existing population-based birth defects surveillance programs in Iowa and Atlanta. The workshops addressed three key aspects for expanding birth defects programs to conduct active, population-based surveillance on stillbirths: (1) case identification and ascertainment, (2) data collection, and (3) data use and project evaluation. Participants included experts in pediatrics, obstetrics, epidemiology, maternal-fetal medicine, perinatology and pediatric pathology, midwifery, as well as practicing clinicians and pathologists. Expanding existing birth defects surveillance programs to include information of stillbirths could potentially enhance the data available on fetal death reports and also could benefit such programs by improving the ascertainment of birth defects.

Social support, life stress, and anxiety as predictors of pregnancy complications in low-income women

Prospective repeated measures were used to examine attachment, social support, life stress, anxiety, and psychological wellbeing among low-income women in early and late pregnancy and the relationships of these variables to prenatal, intrapartum, and neonatal complications. One hundred and eleven medically healthy, low-income, Medicaid-eligible women ages 18-35 years, between 14 and 22 weeks of pregnancy were recruited from prenatal clinics. Self-report questionnaires and hospital records were used to collect data. Discriminant analysis was performed. The most important discriminating factors for prenatal complications were state anxiety and total functional social support. The factors for neonatal complications were negative life events and the interaction of emotional support with negative life events.

Are outcomes and care processes for preterm neonates influenced by health insurance status?

OBJECTIVE

The purpose of this work was to compare the processes of care and to evaluate outcomes of premature neonates delivered to women with Medicaid managed care versus private insurance.

DESIGN/METHODS

All of the infants born at <37 weeks' gestation between January 2001 and August 2005 in the ParadigmHealth database were included in these analyses (n = 24151). Infants were categorized by maternal health insurance status as private insurance or Medicaid managed care and analyzed for differences in demographic data and length of stay. For survivors, differences in respiratory care, nutritional, and maturational milestones were assessed. In addition, age to wean to open crib, weight gain, home oxygen, and apnea monitor use were compared. Adverse outcomes, including necrotizing enterocolitis, sepsis, severe intraventricular hemorrhage, severe retinopathy of prematurity, bronchopulmonary dysplasia, apnea, and mortality, were compared. Statistical tests used were Students t test, chi(2), and Kruskall-Wallis test. Multiple logistic regression was performed after controlling for demographic variables.

RESULTS

Of the 24151 infants studied, 19046 (78.9%) had private insurance, and 5105 (21.1%) had Medicaid managed care. There were no differences in gestational age at birth; however, Medicaid managed care infants had lower birth weight, lower Apgar score at 5 minutes, increased incidence of necrotizing enterocolitis and bacterial sepsis, and longer length of stay. Of the surviving infants, more neonates with private insurance went home on oxygen and apnea monitors despite no differences found in the incidences of apnea or bronchopulmonary dysplasia between the groups. There were no differences in processes of care for feeding and respiratory milestones, but infants with Medicaid managed care weaned to an open crib later and had greater overall weight gain compared with infants with private insurance.

CONCLUSIONS

We speculate that, in addition to the known impact of insurance status on well-being at birth, Medicaid managed care is independently associated with adverse neonatal outcomes in preterm infants, as well as differences in neonatal intensive care discharge processes.

An ecological approach to understanding black-white disparities in perinatal mortality

Despite appreciable improvement in the overall reduction of infant mortality in the United States, black infants are twice as likely to die within the first year of life as white infants, even after controlling for socioeconomic factors. There is consensus in the literature that a complex web of factors contributes to racial health disparities. This paper presents these factors utilizing the socioecological framework to underscore the importance of their interaction and its impact on birth outcomes of Black women. Based on a review of evidence-based research on Black-White disparities in infant mortality, we describe in this paper a missing potent ingredient in the application of the ecological model to understanding Black-White disparities in infant mortality: the historical context of the Black woman in the United States. The ecological model suggests that birth outcomes are impacted by maternal and family characteristics, which are in turn strongly influenced by the larger community and society. In addition to infant, maternal, family, community and societal characteristics, we present research linking racism to negative birth outcomes and describe how it permeates and is embedded in every aspect of the lives of African American women. Understanding the contribution of history to the various factors of life of Black women in the United States will aid in developing more effective policies and programs to reduce Black infant mortality.

Women's experience of prenatal care: an integrative review

The objective of this study was to identify, synthesize, and critically analyze published research on women's experiences of prenatal care. A search of online databases and relevant citations for research published from 1996 to 2007 was conducted. Thirty-six articles were reviewed. Qualitative analysis methods were used, assisted by research software. This review found that some women were treated respectfully and reported comprehensive, individualized care. However, some women experienced long waits and rushed visits, and perceived prenatal care as mechanistic or harsh. Women's preferences included reasonable waits, unhurried visits, continuity, flexibility, comprehensive care, meeting with other pregnant women in groups, developing meaningful relationships with professionals, and becoming more active participants in care. Some low-income and minority women experienced discrimination or stereotyping and external barriers to care. Further research is recommended to understand women's experiences and to develop and implement evidence-based, women-centered approaches. Clinicians should inquire regarding women's needs and modify care accordingly and also advocate for institutional changes that reduce barriers to care. Implementing comprehensive, redesigned models of care may be one effective way to simultaneously address a variety of women's needs and preferences. If prenatal care becomes more attractive and more accessible, women's experience and pregnancy outcomes may both improve.

The issue of confounding in epidemiological studies of ambient air pollution and pregnancy outcomes

BACKGROUND

Relationships between ambient air pollution levels during pregnancy and adverse pregnancy outcomes have been investigated using one of three analytic approaches: ambient pollution levels have been contrasted over space, time or both space and time. Although the three approaches share a common goal, to estimate the causal effects of pollution on pregnancy outcomes, they face different challenges with respect to confounding.

METHODS

A framework based on counterfactual effect definitions to examine issues related to confounding in spatial, temporal, and spatial-temporal analyses of air pollution and pregnancy outcomes is presented, and their implications for inference are discussed.

RESULTS

In spatial analyses, risk factors that are spatially correlated with pollution levels are confounders; the primary challenges relate to the availability and validity of risk factor measurements. In temporal analyses, where smooth functions of time are commonly used to control for confounding, concerns relate to the adequacy of control and the possibility that abrupt changes in risk might be systematically related to pollution levels. Spatial-temporal approaches are subject to challenges faced in both spatial and temporal analyses.

CONCLUSION

Each approach faces different challenges with respect to the likely sources of confounding and the ability to control for that confounding because of differences in the type, availability, and quality of information required. Thoughtful consideration of these differences should help investigators select the analytic approach that best promotes the validity of their research.

The effect of migration background on obstetric performance in Switzerland

OBJECTIVES

Population-based analysis to compare perinatal outcome between immigrant women and women from the Western industrialized world (WIW).

METHODS

Singleton pregnancies of a cohort that was followed from the first trimester to delivery at the University Women's Hospital Basel, Switzerland, were retrospectively analysed. Data were extracted from 203 patient records. Multiple logistic and linear regression analyses were used to determine the impact of origin on perinatal outcome.

RESULTS

Immigrants and women from WIW countries were comparable regarding number of pregnancy control visits. Immigrant women were younger, had more children, higher pre-pregnancy body mass index and were more often taking medication of any kind during pregnancy. Migration was only predictive for shorter gestations (p < 0.01). A trend for a lower frequency of gestational hypertension and labour inductions, and a higher frequency of spontaneous delivery and lower birth weights were observed.

CONCLUSIONS

Migration background was associated with shorter gestations and lower birth weight. This was not due to differences in antenatal care since both study groups were followed at the same clinic with the same guidelines and had the same number of consultations during pregnancy. Higher stress levels due to migration and lower socioeconomic living standards, nutrition, and genetic factors are possible contributors to these findings.

The role of race in cesarean delivery rate case mix adjustment

OBJECTIVE

Primary cesarean delivery rates vary by race and ethnicity. We determined whether the inclusion of race and ethnicity substantially improved predictive ability in predictive models for primary cesarean delivery.

STUDY DESIGN

Data from 371,468 women who were at risk for primary cesarean delivery were obtained from 2003 California birth certificates. A logistic regression model for primary cesarean delivery was built with maternal age, race and ethnicity, medical conditions, gestational age, multiple births, insurance, nulliparity, complications of pregnancy, and the trimester in which prenatal care began. The model's predictive validity was then compared with a model that excluded race and ethnicity.

RESULTS

The C statistics (also called the area under the receiver operating characteristic curve for models) with (0.766) and without (0.764) race and ethnicity were similar and demonstrated that the addition of race and ethnicity did not substantially increase the predictive discrimination of the model. Additionally, there was no substantial difference in model calibration.

CONCLUSION

Risk-adjustment models with and without race and ethnicity do not differ substantially in discrimination or calibration.

Adverse birth outcome among mothers with low serum cholesterol

OBJECTIVE

The objective of this study was to assess whether low maternal serum cholesterol during pregnancy is associated with preterm delivery, impaired fetal growth, or congenital anomalies in women without identified major risk factors for adverse pregnancy outcome.

METHODS

Mother-infant pairs were retrospectively ascertained from among a cohort of 9938 women who were referred to South Carolina prenatal clinics for routine second-trimester serum screening. Banked sera were assayed for total cholesterol; <10th percentile of assayed values (159 mg/dL at mean gestational age of 17.6 weeks) defined a "low total cholesterol" prenatal risk category. Eligible women were aged 21 to 34 years and nonsmoking and did not have diabetes; neonates were liveborn after singleton gestations. Total cholesterol values of eligible mothers were adjusted for gestational age at screening before risk group assignment. The study population included 118 women with low total cholesterol and 940 women with higher total cholesterol. Primary analyses used multivariate regression models to compare rates of preterm delivery, fetal growth parameters, and congenital anomalies between women with low total cholesterol and control subjects with mid-total cholesterol values >10th percentile but <90th percentile.

RESULTS

Prevalence of preterm delivery among mothers with low total cholesterol was 12.7%, compared with 5.0% among control subjects with mid-total cholesterol. The association of low maternal serum cholesterol with preterm birth was observed only among white mothers. Term infants of mothers with low total cholesterol weighed on average 150 g less than those who were born to control mothers. A trend of increased microcephaly risk among neonates of mothers with low total cholesterol was found. Low maternal serum cholesterol was unassociated with risk for congenital anomalies.

CONCLUSIONS

Total serum cholesterol <10th population percentile was strongly associated with preterm delivery among otherwise low-risk white mothers in this pilot study population. Term infants of mothers with low total cholesterol weighed less than control infants among both racial groups.

Factors that affect the food choices made by girls and young women, from minority ethnic groups, living in the UK

BACKGROUND

Lower birth weight, often found in infants from minority ethnic groups, may be partly because of the disproportionate representation of ethnic minority groups in low-income areas. To develop an intervention, to improve the nutritional intake of young women from populations at risk of low-birth-weight babies, which would be culturally sensitive and well received by the intended recipients, a community development approach was used to investigate factors that might influence food choice and the nutritional intake of girls and young women from ethnic minority groups.

METHODS

Focus group discussions were conducted across the UK, to explore factors that might affect the food choices of girls and young women of African and South Asian decent. The data was analysed using deductive content analysis (Qual. Soc. Res., 1, 2000, 1). Discussions were around the broad themes of buying and preparing food, eating food and dietary changes, and ideas for an intervention to improve diet.

RESULTS

The focus group discussions indicated that all the communities took time, price, health and availability into consideration when making food purchases. The groups were also quite similar in their use of 'Western' foods which tended to be of the fast food variety. These foods were used when there was not enough time to prepare a 'traditional' meal.

CONCLUSION

Many issues that affect the food choice of people who move to the UK are common within different ethnic groups. The idea of a practical intervention based on improving cooking skills was popular with all the groups.

"They can't understand it": maternity health and care needs of immigrant Muslim women in St. John's, Newfoundland

OBJECTIVES

The purpose of this qualitative study was to document and explore the maternity health care needs and the barriers to accessing maternity health services from the perspective of immigrant Muslim women living in St. John's, Canada.

METHODS

A purposive approach was used in recruiting six individuals to participate in in-depth semi-structured interviews. Data were analyzed using a two-step process of content analysis. Three metathemes were identified and compared to previous research on maternity health and the care needs of immigrant women.

RESULTS

Women experienced discrimination, insensitivity and lack of knowledge about their religious and cultural practices. Health information was limited or lacked the cultural and religious specificity to meet their needs during pregnancy, labor and delivery, and postpartum phases. There were also significant gaps between existing maternity health services and women's needs for emotional support, and culturally and linguistically appropriate information. This gap was further complicated by the functional and cultural adjustments associated with immigration.

CONCLUSIONS

Maternity health care information and practices designed to meet the needs of mainstream Canadian-born women lacked the flexibility to meet the needs of immigrant Muslim women. Recommendations for change directed at decision makers include improving access to culturally and linguistically appropriate maternity and health related information, developing the diversity responsiveness of health care providers and the organizations where they work and establishing social support networks and partnerships with immigrant communities. Changes that address the needs of immigrant Muslim women have the potential to create more inclusive and responsive maternity health services for all Canadian women.

Effect of the Washington Special Supplemental Nutrition Program for Women, Infants and Children (WIC) on Pregnancy Outcomes

OBJECTIVES

We determined the effect of the Washington State Special Supplemental Nutrition Program for Women, Infants, and Children (WIC) on adverse pregnancy outcomes.

METHODS

We used a record-linkage retrospective cohort design. We matched records of eligible women who enrolled in Washington WIC from 9/1/1999-12/31/2000 to records of their subsequent birth/fetal death from the Washington State Department of Health to determine their pregnancy outcome between 9/1/1999-10/15/2001 (N = 42,495). We selected comparison women from birth/fetal death records who were WIC-eligible but not on WIC (N = 30,751). We used unconditional logistic regression for analysis.

RESULTS

WIC was protective for preterm delivery depending on history of abortion and adequacy of prenatal care, being most protective for women with abortion and inadequate prenatal care (Odds ratio (OR) = 0.4; 95% confidence interval (CI) = 0.3-0.5). WIC was protective for low birth weight depending on women's cervical health, with most protection conferred to those with incompetent cervix (OR = 0.2; 95% CI = 0.1-0.6). WIC was protective for fetal death depending on women's education, being most protective to those with <12 years of education (OR = 0.2; 95% CI = 0.1-0.3).

CONCLUSIONS

WIC is protective for adverse pregnancy outcomes especially for high risk women.

Birth outcomes among urban African-American women: a multilevel analysis of the role of racial residential segregation

Residential segregation is a common aspect of the urban experiences of African-Americans in the United States (US), yet few studies have considered how segregation might influence perinatal health. Here, we develop a conceptual model of relationships between segregation and birth outcomes and test the implications of the model in a sample of 434,376 singleton births to African-American women living in 225 US Metropolitan Statistical Areas (MSAs). Data from the National Center for Health Statistics 2002 birth files were linked to data from the 2000 US Census and two distinct measures of segregation: an index of isolation (the probability that an African-American resident will encounter another African-American resident in any random neighborhood encounter) and an index of clustering (the extent to which African-Americans live in contiguous neighborhoods). Using multilevel regression models, controlling for individual- and MSA-level socioeconomic status and other covariates, we found higher isolation was associated with lower birthweight, higher rates of prematurity and higher rates of fetal growth restriction. In contrast, higher clustering was associated with more optimal outcomes. We propose that isolation reflects factors associated with segregation that are deleterious to health including poor neighborhood quality, persistent discrimination and the intra-group diffusion of harmful health behaviors. Associations with clustering may reflect factors associated with segregation that are health-promoting such as African-American political power empowerment, social support and cohesion. Declines in isolation could represent positive steps toward improving birth outcomes among African-American infants while aspects of racial contiguity appear to be mitigating or indeed beneficial. Segregation is a complex multidimensional construct with both deleterious and protective influences on birth outcomes, depending on the dimensions under consideration. Further research to understand racial/ethnic and economic health disparities could benefit from a focus on the contributory role of neighborhood attributes associated with the dimensions segregation and other social geographies.