Buka SL, et al. Neighborhood support and the birthweight of urban infants. Am J Epidemiol. 2003;157(1):1-8.
The goal of this study was to determine whether perceived levels of social support affected birthweight. Data suggested that infants born to African-American mothers were, on average, 297 grams lighter than those born to white mothers. For African-American mothers only, the mean birthweight decreased significantly as the neighborhood level of economic disadvantage increased. A positive association between perceived levels of social support and birthweight was found for white mothers only.