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Table 1 Changes in Maternal demographics from 2005–2017

From: Impact of childbirth policy changes on obstetric workload over a 13-year period in a regional referral center in China – implications on service provision planning

Year

Total births (n = 49,479)

Multiparas (%)

Age ≥ 35 years (%)

High BMIa (%)

ART pregnancy (%)

Tertiary education(%)

2005

1941

10.6

6.5

5.4(78/1453)

0.2

22.9(443/1932)

2006

2278

13.6

7.7

6.9(121/1751)

0.2

43.7(996/2278)

2007

3011

10.1

7.9

6.7(173/2565)

0.1

40.5(1209/2983)

2008

2968

12.4

8.9

5.6(151/2687)

0.4

37.2(1102/2960)

2009

2806

12.2

9.7

5.8(161/2781)

0.4

40.1(1123/2799)

2010

2900

13.7

11.3

6.7(193/2884)

0.6

43.9(1268/2891)

2011

3267

15.8

12.0

7.5(244/3246)

0.7

45.3(1481/3267)

2012

4140

16.1

10.7

6.9(286/4118)

0.5

48.4(2005/4140)

2013

4000

20.5

13.1

8.7(347/3983)

0.6

49.8(1991/4000)

2014

5096

22.6

12.4

9.1(463/5085)

0.3

55.5(2829/5094)

2015

4595

32.8

16.5

10.3(473/4578)

0.5

57.1(2617/4581)

2016

6700

35.2

17.2

10.8(721/6700)

1.3

61.0(4085/6700)

2017

5777

50.8

24.3

12.5(721/5749)

2.10

78.2(4516/5777)

Difference

P < 0.001

P < 0.001

P < 0.001

P < 0.001

P < 0.001

P < 0.001

Correlation

P < 0.001

P < 0.001

P < 0.001

P < 0.001

P < 0.001

P < 0.001

  1. Results expressed in % unless specified, comparison of difference by χ2 test, correlation analysis by Spearman’s test; BMI body mass index, ART assisted reproduction technology
  2. aMissing = 1899; bMissing = 77