Unmasking adverse birth outcomes among Hispanic subgroups.

The 1988 Upstate New York Live Birth Certificate was the first to record Hispanic ethnicity and country of origin. This registry was used to compare low birthweight and preterm delivery among non-Hispanic white, non-Hispanic black, and Hispanic infants. Risk of low birthweight and preterm delivery was assessed for Hispanics by country of origin. Unconditional backward elimination logistic regression analysis, controlling for confounders was used to assess risk of low birthweight and preterm delivery of Hispanic subgroups compared to non-Hispanic white and non-Hispanic black mothers. The data showed that non-Hispanic black mothers are at greatest risk of low birthweight and preterm delivery. Hispanics as a group have rates similar to non-Hispanic white mothers, although risk of preterm delivery and low birthweight differs among Hispanic ethnic subgroups. This study supports the need to assess Hispanic subgroups separately rather than as a single entity.