Labor and delivery events and risk of Sudden Infant Death Syndromexk (SIDS)

The purpose of this study was to assess whether labor and delivery events were nsk factors for sudden infant death syndrome (SIDS). A nested case-control design was used. From the 1974 cohort of live births for Upstate New York (exclusive of New York City), resident mothers (n = 132,948), SIDS cases, and living controls were selected. Data were abstracted from hospital delivery and vital records for 148 autopsied cases and 355 frequency-matched controls With the use of unconditional logistic regression, no increase in SIDS risk was observed for artificial rupture of membranes, medication use dunng labor, induction/augmentation of labor, or anesthesia for delivery. An increased risk of SIDS was observed for labor 16 hours or more (odds ratio (OR) = 2.6, 95% confidence interval (Cl) 1.1-6.5) and vaginal breech delivery (OR = 7.2, 95% Cl 0.7-72.2). Significant inverse trends were observed for Apgar scores and nsk of SIDS. Am J Epidemiol 1991; 133: 900-6.