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. 2013 Oct;2(4):160–166. doi: 10.3978/j.issn.2224-4336.2013.10.05

Table 4. Triggers of asthma attacks in three areas [n (%)].

Group tastes n Respiratory tract infection Climate change Foods Irritative Sports Pollen
Urban area 551 498 (90.4) 272 (49.4) 76 (13.8) 186 (33.8) 130 (23.6) 44 (8.0)
Suburban area 150 131 (87.3) 70 (46.7) 16 (10.7) 59 (39.3) 29 (19.3) 10 (6.7)
Rural area 142 141 (99.3) 72 (50.7) 18 (12.7) 50 (35.2) 32 (22.5) 2 (1.4)
Total 843 770 (91.3) 414 (43.8) 110 (13.0) 295 (35.0) 191 (22.7) 56 (6.6)