TABLE 1.

Infant Characteristics (n = 227)

Characteristic	Mean ± SD (Range)
Birth weight, kg, n = 224a	3.1 ± 0.5 (2.0–4.5)
Gestational age, wk, n = 226a	38 ± 1.5 (27–43)
Age at first FS-PT, h, n = 215a	36 ± 23 (10–166)
Entry TB on first FS-PT day, mg/dL, n = 220a	7.6 ± 2.9 mg/dL (2.3–19.1)
Exit TB on first FS-PT day, mg/dL, n = 176a	7.1 ± 2.5 mg/dL (3.0-14.3)

^aTotals are less than 227 due to missing data.