Table 1 Comparison of general data between the two groups

Gestation (\(\overline{x}\)±s)/week

39.43±1.37

40.13±1.44

t = -1.99

0.051

Admission age(\(\overline{x}\)±s)/h

3.52±3.69

3.63±3.11

t = -0.13

0.899

Birth weight(\(\overline{x}\)±s)/g

3543±364.53

3616±419.03

t = -0.74

0.461

Caesarean [n (%)]

13(41.9)

15(44.1)

c² = 0.03

0.859

Gender [boy, n (%)]

18(58.1)

21(61.8)

c² = 0.09

0.761

1 minutes Apgar score[M(P_25~75)]

4.5(1.0)

4.0(2.0)

F = 0.37

0.453

5 minutes Apgar score[M(P_25~75)]

7.0(1.0)

7.0(2.0)

F = 0.71

0.714

Administration time of PS [M(P_25~75)]

7.2(5.2)

8.1(3.9)

F = -0.10

0.922