Affordable Care Act standards for race and ethnicity mask disparities in maternal smoking during pregnancy.

OBJECTIVE:This study compared maternal smoking during pregnancy between the new Patient Protection and Affordable Care Act (ACA) data collection standards and Federal Office of Management and Budget (OMB) standards. METHOD:Data were from the Massachusetts Standard Certificate of Live Births on 1,156,472 babies from 1996 to 2010. A parent reported whether the mother smoked during pregnancy (yes/no), her race (5 options) and, separately, her ethnicity (39 categories). Prenatal smoking rates were compared between the ACA and OMB standards. Detailed ethnicity from the birth certificate was then examined within all broad categories of the ACA standards: White, Black/African American, Other Hispanic, Other Asian/Pacific Islander, and Other categories. RESULTS:For Hispanic/Latina and Asian mothers, the ACA standards captured the variability in smoking across and within racial/ethnic groups more than the OMB standards. However, for White and Black/African American mothers, the broad ACA categories masked striking differences in prenatal smoking. While the overall prevalence among Whites was 10.2%, this ranged from 0.8% for Iranians to 21.0% for Cape Verdeans. Among Black/African Americans (7.6%), this ranged from 0.5% for Nigerians to 12.9% for African Americans. The ACA standards also combined ethnic groups with sizeable populations into Other Hispanics and Other Asian/Pacific Islanders. CONCLUSION:When population health surveys and other reporting tools are being revised, state and federal agencies should consider expanding all race/ethnicity categories to capture detailed ethnicity on everyone.