TABLE 2.

Characteristics of Case (Postneonatal Death) and Control (Live Birth) infants

VariablesOriginal SamplesSUDAAN-Adjusted
Live Birth (n = 7740)Postneonatal Death (n = 1204)Live Birth (N = 3186497)Postneonatal Death (N = 9145)
Mother's age (y; mean ± SEM)*25.6 ± 0.0623.9 ± 0.226.3 ± 0.0224.4 ± 0.2
Mother's education (y; mean ± SEM)*12.3 ± 0.0311.7 ± 0.112.6 ± 0.0411.8 ± 0.1
Male gender*50.359.852.059.2
Race*
 White44.450.077.268.3
 Black52.246.617.227.3
 Others3.43.45.54.4
Live birth order*
 140.730.841.732.1
 230.932.332.832.5
 ≥328.436.925.535.4
Plurality single*95.295.098.095.4
Birth weight <2500 g*26.023.813.021.9
Congenital malformation reported at birth*1.22.80.82.9
Maternal smoking during pregnancy*22.938.621.739.8
WIC after delivery*50.255.736.849.2
  • n indicates sample size; N, US population estimate; SEM, standard error of the mean; WIC, the nutrition program for Women, Infants, and Children.

  • * P < .01 (SUDAAN-adjusted).