Table 3 Complications and main treatments^a

Subjects, n

450

560

—

—

NRDS

374 (83.1)

440 (78.6)

3.288

0.070

Postnatal glucocorticoid therapy

153 (34.0)

141 (25.2)

9.409

0.002

hsPDA

144 (32.0)

124 (22.1)

12.436

 < 0.001

Interventional ROP

39 (8.7)

20 (3.6)

11.777

0.001

Anemia requires blood transfusion

386 (85.8)

418 (74.6)

19.053

 < 0.001

Feeding intolerance

218 (48.4)

195 (34.8)

19.158

 < 0.001

NEC Bell stage ≥ 2

40 (8.9)

52 (9.3)

0.047

0.828

MBDP

23 (5.1)

15 (2.7)

4.077

0.043

IVH grade III–IV

12 (2.7)

16 (2.9)

0.034

0.855

Periventricular leukomalacia

24 (5.3)

18 (3.2)

2.811

0.094

Early–onset sepsis

84 (18.7)

106 (18.9)

0.011

0.916

Late–onset sepsis

105 (23.3)

74 (13.2)

17.521

 < 0.001

PNAC

88 (19.6)

61 (10.9)

14.888

 < 0.001

Invasive mechanical ventilation, d^b

3 (0, 10)

1 (0, 5)

–6.400

 < 0.001

Total hospital stay, d ^b

62 (50, 75)

53 (45, 66)

–6.553

 < 0.001