TABLE 2

Description of Study Cohorta

Controls (n = 1063)Patients (n = 350)
Maternal ethnicity, %
 Asian15.314.3
 Black8.210.0
 Hispanic20.918.9
 White49.047.1
 Other6.69.7
Multiple gestation, %2.82.0
Gestational age, wk, %
 34–366.514.0
 37–4079.767.1
 ≥4113.818.9
Male, %51.353.7
Birth weight, g, mean ± SD3440 ± 5213399 ± 593
Birth weight <2500 g, %3.86.9
Cesarean delivery, %19.539.4
Apgar score <7 at 5 min, %0.710.9
Died, %0.01.1
Statusb at 6 h of age, %
 Clinical illness1.824.0
 Equivocal presentation5.618.6
 Well appearing92.757.4
Statusb at 12 h of age, %
 Clinical illness2.027.1
 Equivocal presentation2.517.4
 Well appearing95.655.4
Statusb at 24 h of age, %
 Clinical illness2.229.4
 Equivocal presentation0.62.3
 Well appearing97.368.3
  • a Additional detail on study cohort can be found in citation 2. Tabular data disaggregating derivation and validation cohorts are in the Supplemental Information.

  • b Clinical status based on available data closest to the infant’s specified age in hours. See Table 1 for the specific description of the hierarchical classification of clinical signs.