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Table 2 Mean prevalence of gestational diabetes mellitus, 2016–2018

From: Trends in prevalence of gestational diabetes mellitus in Zhejiang Province, China, 2016–2018

Age at diagnosis (years)

Number of cases

Number of births

Prevalence (%)

95% CI (%)

Overall

    

 20–24

6137

241,055

2.55

2.48–2.61

 25–29

32,525

397,700

8.18

8.09–8.26

 30–34

32,057

216,381

14.82

14.67–14.97

 35–39

20,627

85,276

24.19

23.90–24.48

 40–44

5410

22,028

24.56

23.99–25.13

 45–50

307

6813

4.51

4.03–5.02

 20–50

97,063

969,252

10.01

9.95–10.07

Standardized prevalencea

212,266

2,907,756

7.30

7.27–7.33

Urban areas

 20–24

2644

57,385

4.61

4.44–4.78

 25–29

16,364

138,443

11.82

11.65–11.99

 30–34

16,671

81,240

20.52

20.24–20.80

 35–39

10,253

31,082

32.99

32.46–33.51

 40–44

2470

9614

25.69

24.82–26.58

 45–50

123

3429

3.59

2.99–4.26

 20–50

48,525

321,193

15.11

14.98–15.23

Standardized prevalencea

87,975

963,579

9.13

9.07–9.19

Rural areas

 20–24

3493

179,652

1.94

1.88–2.01

 25–29

16,161

255,185

6.33

6.24–6.43

 30–34

15,386

118,536

12.98

12.79–13.17

 35–39

10,374

51,245

20.24

19.90–20.59

 40–44

2940

13,695

21.47

20.78–22.17

 45–50

184

4292

4.29

3.70–4.94

 20–50

48,538

622,605

7.80

7.73–7.86

Standardized prevalencea

116,552

1,867,818

6.24

6.21–6.27

  1. CI confidence interval
  2. aAge-standardized to the 6th population census in Zhejiang Province, 2010