Table 1 Comparison of clinical features of 416 term infants

Maternal diabetes, n(%)

8(9.8%)

6(1.8%)

10.495

0.001

Hypertensive disorders of pregnancy, n(%)

1(1.2%)

4(1.2%)

1

Treat with magnesium sulphate

1(1.2%)

3(0.9%)

0.586

Intrauterine infection, n(%)

7(8.5%)

16(4.8%)

1.124

0.289

Placental abruption, n(%)

3(3.7%)

2(0.6%)

0.055

Meconium-stained amniotic fluid, n(%)

1(1.4%)

11(3.3%)

0.406

0.524

Forceps delivery, n(%)

9(11%)

34(10.2%)

0.045

0.832

Gender, male, n(%)

55(67.1%)

160(47.9%)

9.688

0.002

Delivery mode, cesarean delivery, n(%)

36(43.9%)

84(25.1%)

11.28

0.001

Neonatal asphyxia, n(%)

5(6.1%)

17(5.1%)

0.008

0.928

Twin pregnancy, n(%)

2(2.4%)

2(0.6%)

0.176

Small for Gestational Age, n(%)

20(24.4%)

24(7.2%)

20.604

<0.001

Birth weight(g)

3355(2667.5,3695)

3425(3090,3720)

11616.5

0.033

Gestational age(week), n(%)

39.4(38.0,40.2)

39.4(38.6,40.2)

13396.5

0.76

Maternal age(year)

28.5(27,31)

28(27,31)

13471.5

0.762

The time of pregnancy

1(1,2)

1(1,2)

12978.5

0.412

The time of delivery

1(1,1)

1(1,1)

13,064

0.347

PROM(h)

0(0,0)

0(0,6.75)

12,117

0.032

25-VitD3(ng/ml)

13.3(9.6,18.225

13.95(10.15,18.5)

13,181

0.599

Calcium(mmol/L)

2.205(2.108,2.38)

2.235(2.088,2.35)

13044.5

0.505

Magesium(mmol/L)

0.765(0.71,0.84)

0.81(0.74,0.88)

10963.5

0.005

ALP(U/L)

123(101,156)

120(102,144)

13,363

0.734