Bertoli, Fernando, et al. “Infant Mortality by Socio-Economic Status for Blacks, Indians and Whites: A Longitudinal Analysis of North Carolina, 1968-1977.” Sociology and Social Research 68.3 (April 1984): 364-77.
An analysis of birth and infant death records showed the greatest infant mortality decline during the 10-year period among Indians (19.9%). Indians had a higher postneonatal mortality rate than Whites or Blacks. For overall infant mortality, Indians fell between Whites and Blacks. Statistics for Indians are not broken down by tribe.