Table 2

Prevalence of exercise induced bronchospasm (EIB) by sex and area of residence

Rural n (%)Urban n (%)OR (95% CI)2-150
Boys and girls (n)479573
 EIB10  63 (13.2)131 (22.9)1.96 (1.41 to 2.72)
 EIB15  29 (6.1) 56 (9.8)1.68 (1.06 to 2.68)
Boys (n)209289
 EIB10  24 (11.5) 68 (23.5)2.37 (1.43 to 3.93)
 EIB15  13 (6.2) 30 (10.4)1.75 (0.89 to 3.44)
Girls (n)270284
 EIB10  39 (14.4) 63 (22.2)1.69 (1.09 to 2.62)
 EIB15  16 (5.9) 26 (9.2)1.60 (0.84 to 3.05)
  • 2-150 Prevalence odds ratio: urban versus rural.

  • EIB10, EIB15 = 10% or more or 15% or more fall in FEV1 after exercise.