Figure 2

Adjusted odds ratios of perinatal birth event classifications among the 31 hospitals and three control groups. Adjusted odds ratios of the number of perinatal events classified as an early neonatal death (live birth followed by infant death occurring within 24 hours of birth) versus classified as a fetal death by three control groups and 31 individual hospitals with at least 60 such combined events during the study period. A = reference group of birth events in counties with small numbers of births. B = birth events that did not occur in a hospital. C = birth events in other hospitals in counties where one of the 31 individual hospitals was located. 1 – 31 = individual hospitals with ≥60 birth events during the study period. * = significantly different from the reference group (A).