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Table 5. Average annual percentage change of gestational diabetes mellitus prevalence by demographic factors

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

Characteristic

Average annual percentage change (%)

95% CIs

Lower (%)

Upper (%)

Overall

 20–24 years

− 4.38

− 7.27

− 1.40

 25–29 years

− 1.35

− 2.66

0.00

 30–34 years

5.23

3.83

6.66

 35–39 years

8.51

6.70

10.34

 40–44 years

28.08

23.92

32.37

 45–50 years

32.35

15.08

52.22

 20–50 years

5.48

4.67

6.30

Urban areas

 20–24 years

− 12.82

− 16.82

− 8.63

 25–29 years

− 6.01

− 7.76

− 4.22

 30–34 years

− 1.20

− 3.02

0.65

 35–39 years

2.51

0.10

4.97

 40–44 years

25.78

19.79

32.06

 45–50 years

37.49

10.06

71.74

 20–50 years

0.00

− 1.08

1.10

Rural areas

 20–24 years

2.53

− 1.56

6.79

 25–29 years

3.60

1.66

5.58

 30–34 years

12.70

10.53

14.91

 35–39 years

14.79

12.11

17.54

 40–44 years

30.04

24.34

36.00

 45–50 years

29.07

7.81

54.52

 20–50 years

11.28

10.07

12.51

  1. Multivariable Poisson regression models with the calendar year as a continuous variable and adjusting for the other covariates
  2. CI confidence interval