TABLE 4

Association Between Individual Patient and Nursery Characteristics and TcB Values That Were ≥2 mg/dL Lower, or ≥2 mg/dL Higher, Than the Matched TSB Level

VariableOutcome: TcB ≥2 mg/dL Lower Than TSBaOutcome: TcB ≥2 mg/dL Higher Than TSBa
Age <48 h3.31 (1.51–7.24)0.30 (0.19–0.46)
Gestational age ≥38 wk1.16 (0.54–2.48)1.38 (0.89–2.15)
Birth weight <2500 g3.68 (1.54–8.79)1.05 (0.51–2.15)
TcB meter brand JM-103b3.25 (1.62–6.25)0.44 (0.29–0.65)
TcB obtained by nurse1.11 (0.52–2.35)0.70 (0.45–1.07)
Anatomic site assessed
 ForeheadRefRef
 Chest2.27 (1.22–4.24)0.50 (0.31–0.81)
 Both chest and forehead0.16 (0.02–1.36)2.50 (1.30–4.86)
TSB laboratory method
 Neonatal bilirubinRefRef
 Diazo method0.57 (0.29–1.11)1.07 (0.76–1.50)
 Bilirubin oxidase0.49 (0.06–4.20)0.32 (0.07–1.48)
 African-American raceb0.13 (0.03–0.56)3.09 (2.03–4.70)
 White raceb3.41 (1.36–8.57)0.43 (0.29–0.62)
 Hispanic ethnicityc0.92 (0.46–1.85)0.47 (0.30–0.71)
  • Data are presented as OR (95% CI).

  • a OR and 95% CI after controlling for TSB level and nursery size (by quintile) and by accounting for multiple measurements in the same newborn.

  • b TcB brand missing for 27 measurements and race missing for 173 measurements.

  • c Infants for whom ethnicity data were recorded as unknown were classified as non-Hispanic. Data on ethnicity missing for 2 measurements.