Table 3 Baseline characteristics of the study population included in phase 2.

Gestational age (wks)

38.9 ± 1.5

> 37 wks

1983 (91.5)

35 - 36 wks

184 (8.5)

Birth weight (g)

3237 ± 471

Small for gestational age

115 (5.3)

Male

1137 (52.5)

Race

White

1952 (90.1)

Asian

106 (4.9)

Black African

55 (2.5)

Hispanic

54 (2.5)

Mode of delivery

Vaginal

1159 (53.5)

Cesarean section

953 (44)

Vacuum extractor

55 (2.5)

Apgar score

< 7 at 1'

53 (2.4)

< 7 at 5'

0

Feeding

Exclusive breast feeding

1267 (58.5)

Breast + bottle feeding

848 (39.1)

Bottle feeding

52 (2.4)

Weight loss > 10%

127 (5.9)

Age at TSB (h.)

63 ± 21

TSB value (mg/dL)

9.4 ± 0.6

Significant hyperbilirubinemia

55 (2.5)

Required phototherapy

46 (2.1)

TSB > 17 mg/dL

9 (0.4)