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Table 3 Maternal age-specific disparity of prevalence of CHD between rural and urban areas in Guangdong, 2008-2012

From: Prevalence of congenital heart defect in Guangdong province, 2008-2012

Age

  Urban

  Rural

  Provincial

 

Cases

Prevalencea

95% CI

Cases

Prevalenceb

95% CI

Cases

Prevalencec

95% CI

<20

33

47.37

31.24 ~ 63.49

49

32.27

23.24 ~ 41.29

82

37.02

29.02 ~ 45.02

20-

547

57.49

52.68 ~ 62.29

571

39.16

35.96 ~ 42.37

1118

46.40

43.69 ~ 49.11

25-

1365

63.19

59.85 ~ 66.53

845

37.59

35.06 ~ 40.12

2210

50.14

48.05 ~ 52.22

30-

811

72.99

67.99 ~ 78.00

447

43.59

39.56 ~ 47.62

1258

58.88

55.64 ~ 62.13

≥35

375

84.13

75.65 ~ 92.60

225

52.40

45.57 ~ 59.23

600

68.56

63.09 ~ 74.03

  1. Note: Note: CI = Confidence interval.
  2. Prevalence trend was tested by Cochran-Armitage trend test.
  3. aZ = −5.99, P < 0.01; bZ = −3.86, P < 0.01; cZ = −8.70, P < 0.01.