Table 1 Description of characteristics of all subjects collected during 2007–2009.

From: The short-term effects of air pollutants on respiratory disease mortality in Wuhan, China: comparison of time-series and case-crossover analyses

characteristics 2007 (%)2008 (%)2009 (%)Total (%)
Respiratory diseases 573 (27.0)597 (28.2)950 (44.8)2120 (100)
Age<6586 (15.0)65 (10.9)125 (13.2)276 (13.0)
 ≥65487 (85.0)532 (89.1)825 (86.8)1844 (87.0)
GenderMale363 (63.4)399 (66.8)587 (61.8)1349 (63.6)
 Female210(36.6)198 (33.2)363 (38.2)771 (36.4)
Classificationpneumonia35 (6.1)45 (7.5)62 (6.5)142 (6.7)
 COPD188 (32.8)253 (42.4)392 (41.3)833 (39.3)
 Asthma146 (25.5)128 (21.5)207 (21.8)481 (22.7)
 Others204 (35.6)171 (28.6)289 (30.4)664 (31.3)