Odds ratios (unadjusted and adjusted) with 95% confidence interval for urban versus rural residence for exercise induced bronchospasm (EIB10 and EIB15)
| Odds ratio5-150 (95% confidence interval) | |||
|---|---|---|---|
| EIB10 | EIB15 | ||
| Unadjusted | 1.96 (1.41 to 2.72) n= 1052 | 1.68 (1.06 to 2.68) n=1052 | |
| Adjusted for age and sex | 1.80 (1.27 to 2.54) n=1052 | 1.43 (0.88 to 2.33) n=1052 | |
| Adjusted for age, sex, and host5-151 characteristics | 1.65 (1.10 to 2.47) n=792 | 1.04 (0.60 to 1.83) n=792 | |
| Adjusted for age, sex, host, and environmental5-152characteristics | 1.21 (0.69 to 2.11) n=775 | 0.61 (0.28 to 1.33) n=775 | |
↵5-150 Odds ratios were calculated with rural children as the reference category.
↵5-151 Host characteristics were breast feeding for less than six months and a family history of asthma symptoms.
↵5-152 Environmental characteristics were presence of animals in the homestead, ventilation (number of windows/room), parental education (years of education), use of biomass fuel and kerosene for cooking, and exposure to motor vehicle fumes on the way to school.