Richard G Chang

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OBJECTIVE To assess the extent to which women received contraceptive services within 90 days after birth at their first or subsequent visits and whether contraceptive provision was associated with optimal interpregnancy intervals. METHOD We linked California's 2008 Birth Statistical Master File with Medicaid databases to build a cohort of women aged 15-44(More)
OBJECTIVE The purpose of this study was to determine the use of contraceptive methods, which was defined by effectiveness, length of coverage, and their association with short interpregnancy intervals, when controlling for provider type and client demographics. STUDY DESIGN We identified a cohort of 117,644 women from the 2008 California Birth Statistical(More)
This study explores the relation of stress and coping style to blood glucose and mood in adolescents with type 1 diabetes. Diabetes is a complex disease to manage due to the daily regimen that each patient must undergo to prevent negative health consequences. The two primary goals of the study were: (1) to examine the relation of stressful daily events to(More)
Objective To determine the association of age at index birth with postpartum contraceptive use and optimal interpregnancy interval (IPI, defined as delivery to next pregnancy >18 months), controlling for provider type and client demographics among adolescent mothers who have repeat pregnancies. Methods California’s 2008 birth records were linked to(More)
OBJECTIVE Family planning is recommended as a strategy to prevent adverse birth outcomes. The potential contribution of postpartum contraceptive coverage to reducing rates of preterm birth is unknown. In this study, we examine the impact of contraceptive coverage and use within 18 months of a birth on preventing preterm birth in a Californian cohort. (More)
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