Table 3.

Illness Severity: Selected Practices and Outcomes (n = 19 507 ; Range Among Centers in Parentheses)

GA (Weeks)Total
<2828 to 3233 to 37>37
Illness severity and mortality
 Mean admission SNAP-II22 (8–32)9 (5–13)4 (1–8)5 (2–9)7
 Mortality (%)25 (14–44)4 (1–12)2 (0–9)2 (0–9)5
Bacterial infection/treatment
 Infants with positive blood culture (%)30 (0–81)11 (1–50)3 (1–20)4 (0–13)7
 Infants with positive CSF culture (%)4 (0–14)1 (0–5)0 (1–3)0 (0–1)1
 Infection episodes/100 patient d1 (0–5)1 (0–1)0 (0–1)0 (0–1)1
 % treated at least once with antibiotic89 (42–97)87 (57–98)67 (33–88)74 (45–83)75
Respiratory morbidity/support
 Pneumothorax (%)6 (0–19)2 (0–6)3 (0–9)6 (2–13)4
 Assisted respiration (%)94 (64–100)69 (47–93)32 (16–78)28 (8–61)43
 Ventilated d (mean)/patient25 (0–34)6 (1–11)2 (1–5)1 (0–4)21
 Surfactant treatment (%)52 (2–76)28 (17–50)9 (2–25)4 (1–9)14
 Nitric oxide treatment (%)1 (0–7)1 (0–4)1 (0–3)2 (0–5)1
Central nervous system
 Seizures (%)8 (0–24)2 (0–9)3 (1–10)9 (3–23)5
ECMO/surgery
 ECMO treatment (%)0 0 0 (0–1)0 (0–3)0
 Surgery (%; excluding laser/cryo Rx)31 (0–79)8 (0–39)8 (1–29)12 (1–29)11
Parenteral nutrition and blood transfusion
 Parenteral nutrition (% infants)74 (0–86)47 (2–93)13 (1–65)10 (1–49)24
 Blood transfusion (% at least once)73 (0–92)19 (0–54)5 (1–26)5 (0–17)13
Indwelling catheters
 Arterial catheter (%)79 (27–96)42 (24–78)17 (8–54)17 (5–38)27
 Umbilical venous catheter (%)63 (0–94)24 (2–72)9 (2–48)13 (1–48)18
 Percutaneous long venous catheter (%)41 (0–79)12 (0–74)3 (0–34)4 (0–42)8
 Other central venous catheter (%)8 (0–46)1 (0–24)2 (0–20)2 (0–15)2