Table 1 Lifetime prevalence of asthma by ISAAC written questionnaire
From: The prevalence of childhood asthma in China: a systematic review
| Author, year | Place of data collection | Year of data collection | Sample size | Age group (years) | Prevalence (%) |
|---|---|---|---|---|---|
| Leung R [14], 1997 | Hong Kong | 1994−1995 | 4665 | 13−14 | 11.0 |
| Wong GW [15], 2004 | Hong Kong | 2002 | 3321 | 13−14 | 10.2 |
| Lau YL [16], 1998 | Hong Kong | 1995 | 3618 | 6−7 | 7.8 |
| Lee SL [17], 2004 | Hong Kong | 2001 | 4448 | 6−7 | 7.9 |
| Wong GW [18], 2001 | Hong Kong | 1997−1998 | 3110 | 9−11 | 7.7 |
| Beijing | 4227 | 6.4 | |||
| Guangzhou | 3565 | 4.4 | |||
| Chen YZ [19], 1998 | Beijing | 1994−1995 | 4167 | 13−14 | 6.9 |
| Guangzhou | 3855 | 3.9 | |||
| Urumqi | 3207 | 5.4 | |||
| Shanghai | 3483 | 7.1 | |||
| Chongqing | 4296 | 7.1 | |||
| Zhao TB [20], 2000 | Beijing | 1995−1996 | 2978 | 6−7 | 10.7 |
| Urumqi | 2840 | 7.6 | |||
| Ma Y [21], 2009 | Beijing | 2003−2004 | Urban 3531 | 13−14 | 6.3 |
| Rural 3546 | 1.1 | ||||
| Wang HY [22], 2006 | Guangzhou | 2001 | 3516 | 13−14 | 4.6 |
| Yangzong [23], 2006 | Tingri & Sakya (rural Tibet) | 2004 | 2026 | 12−14 | 2.5 |
| Droma Y [24], 2007 | Lhasa (urban Tibet) | 2001 | 3196 | 13−14 | 1.1 |