TABLE 1

Characteristics of Study Population

BWHSOMCH
Sample size390400
Ethnicity, No. (%)
 Asian53 out of 390 (13.6)400 out of 400 (100)
 Black or African American63 out of 390 (16.2)0
 Hispanic or Latino37 out of 390 (9.5)0
 Non-Hispanic white228 out of 390 (58.5)0
 Other or unknown9 out of 390 (2.3)0
Average maternal age (SD), y33.1 (4.4)23.5 (4.3)
Male, No. (%)189 out of 390 (48.5)263 out of 400 (65.8)
Preterm, <37 wk, No. (%)19 out of 390 (4.9)4 out of 5 (80)a
Low birth wt, No. (%)6 out of 390 (1.5)2 out of 14 (14.3)a
TcB available, No. (%)390 out of 390 (100)370 out of 400 (92.5)
Mean TcB level (SD)b7.63 (3.4)9.13 (5.3)
Median TcB level (range)b7.7 (0–18.5)9.1 (0–24.8)
TcB >15, No. (%)8 out of 390 (2.1)68 out of 370 (18.4)
TSB available, No. (%)0265 out of 400 (66.3)
Mean TSB (SD)b12.2 (6.2)
Median TSB (range)b12.4 (0.9–33.3)
TSB >15, No. (%)83 out of 265 (31.3)
  • —, not applicable.

  • a A total of 395 SOMCH subjects were missing gestational age data; 386 SOMCH subjects were missing birth wt data.

  • b Unit for all bilirubin levels is mg/dL.