Although there are biological pathways that conceivably might link stress with preterm birth, studies attempting to demonstrate such a relationship have given conflicting results. For the most part, social support has not been found to reduce preterm births. The present study is a prospective examination of how such factors as life events, social support, depression, and anxiety related to pregnancy may be associated with birth before 37 weeks' gestation. The study cohort included 1962 women who gave birth in central North Carolina in the years 1996-2000. Participants, aged 16 years and older, were entered into the study at 24-29 weeks' gestation. Many subjects were African-American women, and about half were nulliparous. More than half were not married when entering the study. Low-income households were liberally represented in the study group. The incidence of preterm birth was 12%.Life events, social support, and depression were not associated with preterm birth in this study, but women having medium and high scores for self-rated pregnancy-related anxiety were at increased risk; risk ratios were 1.5 and 2.1, respectively. High scores on a scale of perceived racial discrimination also correlated with an increased risk of preterm birth (risk ratio, 1.4). Similar findings were obtained when alcohol or tobacco use was taken into account. Women with greater self-rated anxiety were more at risk of spontaneous than of medically indicated preterm birth. A risk ratio of 1.8 was associated with life events perceived as having had a negative impact. Among women with negative life events, pregnancy-related anxiety was associated with preterm birth triggered by either labor or ruptured membranes. The association between high levels of pregnancy-related anxiety and preterm birth was less marked when limited to women lacking comorbid medical conditions, but it persisted.These findings suggest that some psychosocial measures are in fact associated with preterm birth.

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Household food insecurity has been associated with several negative health outcomes, yet little is known about the prevalence and correlates of household food insecurity during pregnancy. This study was conducted as part of the Pregnancy, Infection, and Nutrition prospective cohort study to identify risk factors of preterm birth. The USDA 18-item scale was used to assess the prevalence of food insecurity among pregnant women with incomes

Some associations between psychosocial variables and preterm birth differed by race.

This study examined a comprehensive array of psychosocial factors, including life events, social support, depression, pregnancy-related anxiety, perceived discrimination, and neighborhood safety in relation to preterm birth (<37 weeks) in a prospective cohort study of 1,962 pregnant women in central North Carolina between 1996 and 2000, in which 12% delivered preterm. There was an increased risk of preterm birth among women with high counts of pregnancy-related anxiety (risk ratio (RR) = 2.1, 95% confidence interval (CI): 1.5, 3.0), with life events to which the respondent assigned a negative impact weight (RR = 1.8, 95% CI: 1.2, 2.7), and with a perception of racial discrimination (RR = 1.4, 95% CI: 1.0, 2.0). Different levels of social support or depression were not associated with preterm birth. Preterm birth initiated by labor or ruptured membranes was associated with pregnancy-related anxiety among women assigning a high level of negative impact weights (RR = 3.0, 95% CI: 1.7, 5.3). The association between high levels of pregnancy-related anxiety and preterm birth was reduced when restricted to women without medical comorbidities, but the association was not eliminated. The prospective collection of multiple psychosocial measures on a large population of women indicates that a subset of these factors is associated with preterm birth.

Postpartum weight retention plays an important role in the pathway leading to obesity among women of childbearing age. The objective of this study was to examine predictors of moderate (1-10 pounds) and high (>10 pounds) postpartum weight retention using data from a prospective pregnancy cohort that followed women into the postpartum period; n = 688 and 550 women at 3 and 12 months, respectively. Analysis included descriptive statistics and predictive modeling using log-binomial techniques. The average weight retained at 3 and 12 months postpartum in this population was 9.4 lb (s.d. = 11.4) and 5.7 lb (s.d. = 13.2), respectively. At 3 months postpartum, prepregnancy weight, gestational weight gain, and hours slept during the night were associated with moderate or high weight retention, whereas having an infant hospitalized after going home and scoring in the upper 75th percentile of the Eating Attitudes Test (EAT) were associated only with high weight retention. At 12 months postpartum, prepregnancy weight, gestational weight gain, and maternal education were associated with moderate weight retention; and gestational weight gain, maternal age, race, employment status, and having an infant hospitalized at birth were associated with high weight retention. The results of this study illustrate the importance of prepregnancy weight and gestational weight gain in predicting postpartum weight retention. Furthermore, given the lack of successful intervention studies that exist to date to help women lose weight in the postpartum period, the results of this study may help to inform future interventions that focus on such aspects as hours of sleep, dealing with stress associated with a hospitalized infant, and nonclinical eating disorder symptomatology.

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Objective: Both self-reported indicators of stress and hormones such as cortisol and corticotrophin-releasing hormone (CRH) have been examined in relation to preterm birth. Although these hormones have been interpreted as biomarkers of stress, it is unclear whether psychosocial measures are empirically associated with biomarkers of stress in pregnant women. Methods: We analyzed data from 1,587 North Carolina pregnant women enrolled in the Pregnancy, Infection, and Nutrition study during 2000-2004 who provided at least one saliva sample for cortisol measurement or blood samples for CRH at 14-19 and 24-29 weeks' gestation. Cortisol measures were limited to those taken between 8 and 10 a.m. Perceived stress, state-trait anxiety, coping style, life events, social support, and pregnancy-specific anxiety were measured by questionnaires and interviews. Spearman correlations and multiple regressions were used to describe the relationship among the measures of stress. Results: No correlations larger than r ¼ 0.15 were seen between reported psychosocial measures and cortisol or CRH. Women with demographic characteristics associated with poor pregnancy outcomes (unmarried, AfricanAmerican, young, low pre-pregnancy body mass index) reported higher levels of stress but did not consistently have higher levels of stress hormones. Pre-eclampsia was associated with higher CRH, but not with higher cortisol. Conclusions:The relationship between measurements of reported stress and biomarkers is not straightforward in large epidemiological studies of pregnancy. For online Supplementary Material, see www.liebertonline.com.