TABLE 2

Comparison Between Failures of Therapy Groups

VariableGroup O, PDA not Closed (N = 5), n (%)Group I, PDA not Closed (N = 12), n (%)PRelative Risk (95% CI)
Antenatal glucocorticoids4 (80)10 (83.3).590.96 (0.58–1.59)
Gestational age
    <28 wk4 (80)6 (50).541.60 (0.78–3.27)
    28–30 wk1 (20)3 (25).680.80 (0.11–5.96)
    30–32 wk0 (0)3 (25).59
Birth weight
    <750 g3 (60)5 (41.6).871.44 (0.54–3.84)
    751–1000 g1 (20)4 (33.3).970.60 (0.09–4.12)
    1001–1500 g1 (20)3 (25).680.80 (0.11–5.96)
HFOV, %3 (60)4 (33.3).691.80 (0.62–5.27)
Sepsis, %3 (60)7 (58.3).631.03 (0.43–2.43)
  • CI indicates confidence interval; HFOV, high-frequency oscillatory ventilation.