Women's childbearing histories and their alcohol use at midlife.

There has been increased alcohol use among mid-life women in recent decades. Given the association between alcohol use and childbearing earlier in life and the centrality of childbearing for other aspects of mid-life women's health, we examined how multiple components of childbearing histories were associated with mid-life alcohol use. Our analysis included 3,826 women from the National Longitudinal Survey of Youth 1979 (NLSY79). We estimated how nine components of childbearing were associated with women's alcohol use at age 50. We investigated these components independently and also created six childbearing profiles using Mixed-Mode Latent Class Analysis (MM-LCA). The most alcohol was consumed by women without any childbirths, with older ages at first birth, with low parity, and with the same or fewer births than expected. Women with older ages at first and last birth and more childbirths were less likely to abstain from alcohol compared to women with younger ages at first and last birth and fewer childbirths. Our MM-LCA demonstrated that women with multiple childbirths over a long period of time consumed the least alcohol compared to other groups. Binge drinking at mid-life was generally not associated with childbearing histories in our models. In summary, childbearing histories mattered for women's drinking behaviors at mid-life. Given that an increasing number of women do not have children, the age at first birth continues to trend older, and parity is decreasing, we may expect mid-life women's alcohol use to continue to increase in line with these observed fertility trends.

Sequencing of Births by Wantedness: Implications for Changes in Mid-Life Health Among Aging NLSY79 Women.

OBJECTIVES: As life course frameworks highlight and gerontological studies confirm, the health implications of early birth timing (e.g., adolescent births) and unplanned births (e.g., unwanted or mistimed births) extend years after those births into mid and later life. Yet past research often overlooks the considerable diversity in sequencing and timing of unplanned births even within the same individual (e.g., having both wanted and unwanted births), which are likely fundamental for women's long-term health trajectories. We develop a holistic understanding of birth timing and wantedness to provide insight into when and how childbearing histories matter for aging women's health. METHODS: We use sequence analysis with hierarchical cluster method and estimate regression models using the 1979 National Longitudinal Survey of Youth (N = 3,231) to examine how timing and patterning of births by wantedness are associated with changes in physical and mental health from ages 40 to 50. RESULTS: We identify 7 clusters of childbearing sequences. Of those 7 clusters, respondents with sequences characterized by wanted births in their 20s and 30s had the smallest declines in health in mid-life, whereas respondents with sequences with mainly unwanted births at any age or with mainly mistimed births beginning in adolescence had the greatest health declines. Adjusting for social and economic variables accounted for some, but not all, health differences across childbearing clusters. DISCUSSION: This project demonstrates the need for comprehensive life course perspectives on long-term health implications of birth wantedness and timing, recognizing diversity within and between individuals.

Childbearing Biographies and Midlife Women's Health.

OBJECTIVES: We introduce a "childbearing biography" approach to show how multiple childbearing characteristics cluster in ways significant for midlife health. METHODS: We analyze the National Longitudinal Survey of Youth 1979 (NLSY79; N = 3992) using mixed-mode Latent Class Analysis with eight childbearing variables (e.g., age at first birth, parity, birth spacing, and mistimed births) to identify how childbearing biographies are associated with midlife health, adjusting for key covariates-including socioeconomic status (SES) and relationship history. RESULTS: We identify six childbearing biographies: (1) early compressed, (2) staggered, (3) extended high parity, (4) later, (5) married planned, and (6) childfree. Childbearing biographies are strongly associated with physical health but not mental health, with differences primarily explained by SES. DISCUSSION: Different childbearing biographies are related to physical health inequalities above what is demonstrated by the typical use of one or two childbearing measures, providing a new perspective into the growing health gap among aging midlife women.