Table 1 Demographic and clinical characteristics of patients

Gender, Male (%)

203 (62.5)

5 (50.0)

0.513

Mean birth weight, gram

3170.9 ± 480.4

2783.5 ± 696.8

0.014^†

  ≥ 2500 (ref)

300 (92.3)

7 (70)

  < 2500

25 (7.7)

3 (30)

0.008

Median gestational age, weeks (IQR)

39.1 (38.3–40.0)

37.9 (37.3–39.4)

0.011^‡

Median PGE₁infusion, hours (IQR)

159.0 (104–237)

437 (328–940)

0.632^‡

Average oxygen saturation, percent

87.6 ± 7.2

89.1 ± 7.8

0.399^†

 Full enteral feeding (ref)

323 (99.4)

6 (60)

 Parenteral nutrition or NPO

2 (0.6)

4 (40)

< 0.001

 No (ref)

245 (75.4)

4 (40)

 Yes

80 (24.6)

6 (60)

0.021

 No (ref)

258 (79.4)

4 (40)

 Yes

67 (20.6)

6 (60)

0.009