Table 1.

Clinical characteristics

Clinical data	n = 70
Gestational age, wk, mean (range)	31 (24–42)
Birth weight, g, mean (range)	1596 (590–4281)
Gender (M/F)	38/32
Postnatal age, wk, mean (SE)	3.6 (0.2)
Apgar score 5 min, mean (SE)	8.1 (0.1)

Note: F: female; M: male; SE: standard error; wk: week.