Table 1 Epidemiological data of the study group

Male

11/11

6/17

0.001^a

Gestational age, wk

29.07(SD = 1.26)

29.39(SD = 1.15)

0.509^b

Birth weight, g

1255.45(SD = 177.610)

1323.75(SD = 152.973)

0.274^b

Small for gestational age

0/10

0/16

/

Apgar-1 min

8.0(7.0, 9.0)

9.00(7.5, 9.0)

0.517^c

Apgar-5 min

9.0(9.0, 10.0)

10.0(9.0, 10.0)

0.217^c

IVH grade I or II

3/11

5/17

0.903^a

IVH grade III or IV

0/10

0/16

/

Highest CRP(mg/l)

141.0(115.0, 200.0)

5.0 (1.0, 11.5)

< 0.001^c

PDA treated by Ibuprofen

1/11

3/17

1.000^a

ROP

3/11

2/17

0.353^a

BPD

3/11

7/17

0.689^a

Mechanical ventilation, > 96 h

8/11

0/17

< 0.001^a

Vasoactive drug use

11/11

0/17

< 0.001^a

Fasting days, d

12.0(9.0, 14.0)

0(0,0)

< 0.001^c