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%) |