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Table 2 Time trends in the prevalence of CHD (per 10 000 births) by rural–urban residence in Guangdong province, China, 2008-2012

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

Year      Urban      Rural Urban–rural rate ratio
  Birth Cases Prevalence (95% CI) Birth Cases Prevalence (95% CI)  
2008 83433 495 59.33 (54.12 ~ 64.54) 92131 251 27.24 (23.88 ~ 30.61) 2.18
2009 85413 405 47.42 (42.81 ~ 52.02) 97558 236 24.19 (21.11 ~ 27.27) 1.96
2010 92701 351 37.86 (33.91 ~ 41.82) 100417 373 37.14 (33.38 ~ 40.91) 1.02
2011 97024 638 65.76 (60.67 ~ 70.84) 112746 386 34.23 (30.83 ~ 37.64) 1.92
2012 115238 1242 107.78 (101.82 ~ 113.74) 128391 891 69.40 (64.86 ~ 73.94) 1.55
2008-2012 473809 3131 66.08 (63.77 ~ 68.39) 531243 2137 40.23 (38.52 ~ 41.93) 1.64
  1. Note: CI = Confidence interval.