Table 1 Comparison of general data between the two groups

Distribution of gestational age

 <28 weeks

10(14.9%)

10(14.9%)

1.000

 28 ∼ < 32weeks

36(53.7%)

36(53.7%)

 32 ∼ 36weeks

21(31.3%)

21(31.3%)

Distribution of weight

 <1000 g

8(11.9%)

10(14.9%)

0.744

 1000 ∼ < 1500 g

28(41.8%)

24(35.8%)

 1500 ∼ < 2500 g

31(46.3%)

33(49.3%)

 ≥ 2500 g

0

0

Birth mass (g)

1450(1145,1765)

1480(1250,1810)

0.378

 Male

42(62.7%)

39(58.2%)

0.596

 Older of the twins

18(26.9%)

22(32.8%)

0.450