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Table 1 Causes of chronic cough in different regions of China

From: Diagnosis and treatment of chronic cough in China: an insight into the status quo

  Regions N Asthma PNDS GERC EB Others
Ma et al. [28] (2003) Guangzhou 86 28% 26% 14% 15% /
Lai et al. [29] (2006) Guangzhou 194 14% 17% 12% 22% AC (12%)
Wang et al. [30] (2007) Beijing 106 66.3% 14.1% 10.4% 1.9% PIC (3.8%)
Yang et al. [31] (2005) Shanghai 105 51.4% 26.7% 1.9% 5.7% PIC (8.5%)
Cao et al. [32] (2009) Chongqing 233 25.5% 44.4% 9.1% / PIC (2.1%)
Si et al. [33] (2010) Shenyang 96 39.4% 13.5% 1.9% 12.5% AC (11.5%)