Ethnic differences in infant mortality by cause of death

Abstract

The purpose of this study was to examine ethnic differences among non-Hispanic black and white births in the distribution of maternal risk factors of infant mortality across specific causes of death. The data were obtained from the North Carolina linked birth/infant death files (1989 to 1997). Logistic regression models were built to assess the risk distribution of demographic, behavioral and health related variables in relation to causes of infant death, which included congenital anomalies, short gestation/low birth weight (LBW), sudden infant death syndrome, infections and obstetric conditions. Infants born to black women had the highest rates for all causes of mortality compared to those born to white women. Having at least one prior live birth now dead was associated with congenital anomalies, obstetric conditions and short gestation/LBW related deaths in both ethnic groups. Deaths caused by infections were more likely to occur among white young (<20) women. White women enrolled in Medicaid had an increased risk of infant deaths due to short gestation/LBW when compared to those with no Medicaid, while young black mothers (<20 years old) were less likely to experience an infant death due to short gestation/LBW and obstetric conditions. This study provides evidence that maternal sociodemographic risk factors somewhat vary by infant cause of death and ethnicity. This suggests that race-specific approaches may be necessary to reduce infant mortality rates. The differences, however, in the risk distribution of factors across the two ethnic groups were limited indicating that the heterogeneity in the mortality rates may be due to unmeasured factors.