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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.