TABLE 3

Morbidities, Interventions, and Length of Stay

Birth Weight Category−500 g501–750 g751–1000 g1001–1250 g1251–1500 gAll Infants
Respiratory distress syndrome74 (63–83)76 (71–80)63 (59–68)49 (45–53)36 (32–40)54 (52–57)
Surfactant treatment (times)1.4 ± 1.41.1 ± 0.90.8 ± 0.70.6 ± 0.90.4 ± 0.60.7 ± 0.9
HFO67 (56–77)63 (58–68)36 (31–41)16 (13–20)9 (7–12)29 (27–32)
Postnatal steroid for CLD33 (22–46)38 (32–43)23 (19–28)7 (5–10)2 (1–5)18 (16–20)
    Oxygen at 28 d60 (49–71)67 (62–72)46 (42–51)20 (17–24)8 (6–10)33 (30–35)
    Oxygen at 36 wk56 (42–69)58 (52–63)33 (28–39)14 (10–18)7 (4–10)28 (26–31)
    Oxygen at discharge18 (10–29)12 (9–16)5 (3–7)2 (1–3)1 (1–3)5 (4–6)
Pneumothorax6 (3–14)5 (3–8)3 (2–6)2 (1–3)1 (1–3)3 (2–4)
Pulmonary hemorrhage21 (37–58)9 (7–13)4 (3–6)2 (1–4)2 (1–3)5 (4–6)
PDA47 (37–58)48 (3–53)31 (28–36)21 (17–24)11 (8–13)27 (25–29)
    Indomethacin49 (37–60)51 (46–57)34 (29–39)23 (20–28)13 (10–16)30 (27–32)
    Surgery10 (5–19)12 (9–16)7 (5–10)3 (2–5)1 (0–2)5 (4–7)
IVH any grades33 (24–58)28 (24–46)15 (12–29)7 (5–18)4 (2–9)13 (11–28)
IVH grades 3 and 414 (12–25)16 (12–27)8 (4–12)4 (2–10)2 (1–4)7 (3–10)
PVL3 (1–9)5 (3–8)5 (4–8)3 (2–5)2 (1–4)4 (3–5)
Gastrointestinal perforation4 (1–9)3 (1–3)3 (0–3)2 (0–1)0 (0–0)3 (0–5)
Sepsis33 (24–45)17 (14–22)9 (6–12)5 (3–7)3 (2–5)8 (7–10)
ROP treatment33 (23–46)42 (37–47)28 (24–33)9 (6–12)2 (1–4)19 (17–21)
Postnatal steroid for AOP11 (24–100)11 (0–70)6 (0–71)2 (0–33)0 (0–8)4 (0–52)
Length of stay of nonsurvivors40.3 ± 75.822.7 ± 42.533.6 ± 70.029.3 ± 39.514.0 ± 17.028.5 ± 56.3
Length of stay of survivors193.8 ± 60.7142.6 ± 82.2111.5 ± 42.183.0 ± 30.961.1 ± 32.197.4 ± 57.0
  • Data are expressed as mean ± SD or percentage of n in the category with quartile ranges among hospitals in parenthesis. HFO indicates high frequency oscillatory ventilation; PVL, periventricular leukomalacia.