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Table 1 The comparison of the maternal and neonatal outcomes between the period before and after the implementation of ‘second child policy’

From: The Effect of 2016 Chinese second-child policy and different maternal age on pregnancy outcomes in Hebei Province, China

 

2013–2015 year

2016–2021 year

χ2

P Value

Maternal

    

pregnancy complication

38,390(26.4%)

153,586(57.2%)

36056.019

<0.001

Anaemia

22,219(15.3%)

110,044(41.0%)

28710.2

<0.001

GDM

3825(2.6%)

23,028(8.6%)

5504.834

<0.001

PE

3652(2.5%)

7441(2.8%)

24.782

<0.001

Placenta previa

572(0.4%)

1143(0.4%)

2.434

0.119

Placental abruption

339(0.2%)

713(0.3%)

3.955

0.047

Heart disease

347(0.2%)

717(0.3%)

3.007

0.083

Cesarean delivery

76,160(52.4%)

141,054(52.6%)

1.47

0.225

PPH

832(0.6%)

3504(1.3%)

489.65

<0.001

Infant

    

Premature delivery

7377(5.1%)

15,362(5.7%)

77.28

<0.001

Birth weight of newborn

  

32.449

<0.001

SGA

22,170(15.2%)

42,354(15.8%)

  

LGA

19,376(13.3%)

36,522(13.6%)

  

Macrosomia

13,272(9.1%)

23,733(8.8%)

9.181

0.002