Table 2 Epidemiologic features of asthmatic children
Variable | Total n = 602 | Asthmatic n=124 (%) | Significance testχ2 | P value | OR (95% CI) |
|---|---|---|---|---|---|
Age groups | |||||
 5–10 years | 252 | 60 (23.8) | 2.5 | 0.1 | 1.3 |
 > 10–16 years (r) | 346 | 64 (18.5) | (0.9–2) | ||
Sex | |||||
 Male | 260 | 69 (26.5) | 9.8 | 0.002* | 1.8 |
 Female (r) | 342 | 55 (16.1) | (1.2–2.8) | ||
Residence | |||||
 Urban | 226 | 53 (23.5) | 1.8 | 0.5 | 1.3 (0.8–2) |
 Suburbs with lots of gardens | 18 | 4 (22.2) | 0.1 | 1.2 (0.3–3.9) | |
 Suburbs with few of gardens | 37 | 7 (48.9) | 0.001 | 1.01 (0.4–2.4) | |
 Rural (r) | 321 | 60 (18.7) |  |  | |
Crowding Index | |||||
 ≤ 2 persons/room (r) | 530 | 113 (21.3) | 1.4 | 0.2 |  |
 > 2 persons/room | 72 | 11 (15.3) | 0.6 (0.3–1.3) | ||
Birth weight in kg # | |||||
 Normal (> 2.5 kg) (r) | 550 | 111 (20.2) | 0.6 | 0.4 | 1.3 |
 LBW (< 2.5 kg) | 52 | 13 (25) | (0.6–2.5) | ||
NICU admission | |||||
 Yes | 61 | 15 (24.6) | 0.6 | 0.4 | 1.2 |
 No(r) | 541 | 109 (20.1) | (0.6–2.4) | ||
Mech. ventilation | |||||
 Yes | 36 | 13 (36.1) | 5.6 | 0.01* | 2.3 |
 No(r) | 566 | 111(19.6) | (1.1–4.7) | ||
Breast feeding | |||||
 Yes (r) | 519 | 102 (19.7) |  | 0.15 | 1.4 |
 No | 83 | 22 (26.5) | 2.05 | (0.8–2.5) | |
Duration of breast feeding # | |||||
 > 1 year(r) | 498 | 91 (18.3) | 5.09 | 0.01* |  |
 6 months–1 year | 47 | 15 (31.9) | 5.7 | 2.09 (1.09–4.03) | |
 < 6 months | 57 | 18 (31.6) |  | 2.06 (1.113.7) | |
Routine vaccination | |||||
 Yes(r) | 589 | 122 (98.4) | 0.2 | 0.6 |  |
 No | 13 | 2 (1.6) | 0.6 (0.1–3.1) | ||
Optional (flu and/or pneumonia vaccine) | |||||
 Yes (r) | 258 | 56 (45.2) | 0.3 | 0.5 |  |
 No | 344 | 68 (54.8) | 0.8 (0.51.3) | ||