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Original Investigation

Decomposition of Black and White Infant Mortality Rates

JAMA Network Open 10.1001/jamanetworkopen.2026.35321

September 22, 2026 at 11:00 AM EDT

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In this cross-sectional study of IMRs, gestational age composition differences accounted for the largest share of the Black and White infant mortality gap. However, the increased share of the mortality risk component over time underscores the need for targeted interventions beyond preterm birth prevention.

Corresponding Author: Monica J. Alexander, PhD, University of Toronto, 700 University Ave, Level 9, Toronto ON M5G 1Z5, Canada (monica.alexander@utoronto.ca).

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