Table 2

Lifetime prevalence of asthma symptoms by ISAAC video questionnaire
Author, year Place of data collection Year of data collection Sample size Age group (years) Prevalence (%)
wheeze at rest wheeze after exercise night waking with wheeze night waking with cough severe asthma attack
Leung R [14], 1997 Hong Kong 1994−1995 4665 13−14 13.7 21.5 5.5 29.8 9.7
Chen YZ [19], 1998 Beijing 1994−1995 4167 13−14 5.9 7.7 1.4 13.8 2.7
Guangzhou 3855 3.2 9.2 1.5 11.7 2.2
Urumqi 3207 2.4 7.0 0.7 11.5 2.5
Shanghai 3483 3.4 6.0 2.0 4.2 2.8
Chongqing 4296 2.5 8.8 1.0 6.8 1.6
Wang HY [22], 2006 Guangzhou 2001 3516 13−14 5.9 14.1 1.9 10.2 2.7
Yangzong [23], 2006 Tingri & Sakya (rural Tibet) 2004 2026 12−14 2.8 4.1 2.2 3.8 1.4
Droma Y [24], 2007 Lhasa (urban Tibet) 2001 3196 13−14 0.3 1.2 0.03 1.4 0.3

Yangzong et al.

Yangzong et al. BMC Public Health 2012 12:860   doi:10.1186/1471-2458-12-860

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