Table 1 Demographics of preterm neonates included in this study

Sex^a

60 male, 55 female

GA (week)

29 (28 – 30)

24–33

Birth weight (g)

1230 (997–1485)

607–2304

Apgar score, 1 min

6 (4–8)

1–9

Apgar score, 5 min

8 (7–9)

3–9

PNA at initiation (day)

1 (1–3)

0–25

PMA at initiation (week)

29.4 (28.1–30.7)

24.1–33.6

PNA at sampling (day)

15 (10–24)

3–84

PMA at sampling (week)

31.6 (30.1–33.4)

25.6–40.9