Table 4. Residence in early life as a risk factor for asthma among schoolchildren enrolled in a case-control study between 2015–17 (N = 1,670).
| Child’s residence in early life | Asthma cases N = 555 |
Non-asthma controls N = 1115 |
Adj. OR (95% CI)* |
|---|---|---|---|
| Born and spent first 5 years in rural (265) | 50 (9.0) | 215 (19.3) | 1 |
| Born in rural, spent first 5 years in urban (87) | 24 (4.3) | 63 (5.6) | 1.54 (0.86–2.75) |
| Born in urban, spent first 5 years in rural (72) | 22 (4.0) | 50 (4.5) | 2.11 (1.14–3.91) |
| Born and spent first 5 years in urban (1,246) | 459 (82.7) | 787 (70.6) | 2.55 (1.80–3.61) |
N = number; Adj. OR = adjusted odds ratio; CI = confidence interval; number (%) shown in 2nd and 3rd column.
*Adjusted for age, sex, and father’s education level.