| Total n = 1645 | non-JIA n = 1316 | JIA n = 329 |  |
---|---|---|---|---|
n % | n % | n % | P-value | |
Age (year), mean ± SDa | 11.3 ± 3.47 | 11.3 ± 3.47 | 11.3 ± 3.47 | 0.95 |
Stratified age | Â | Â | Â | 0.99 |
 <12 | 645 (39.2) | 516 (39.2) | 129 (39.2) |  |
 ≥12 | 1000 (60.8) | 800 (60.8) | 200 (60.8) |  |
Sex | Â | Â | Â | 0.99 |
 Girls | 840 (51.1) | 672 (51.1) | 168 (51.1) |  |
 Boys | 805 (48.9) | 644 (48.9) | 161 (48.9) |  |
Urbanizationb | Â | Â | Â | 0.99 |
 1 (highest) | 495 (30.1) | 396 (30.1) | 99 (30.1) |  |
 2 | 490 (29.8) | 392 (29.8) | 98 (29.8) |  |
 3 | 270 (16.4) | 216 (16.4) | 54 (16.4) |  |
 4 (lowest) | 390 (23.7) | 312 (23.7) | 78 (23.7) |  |
Co-morbidity | Â | Â | Â | Â |
 Allergic conjunctivitis |  |  |  | 0.02 |
  No | 1354 (82.3) | 1098 (83.4) | 256 (77.8) |  |
  Yes | 291 (17.7) | 218 (16.6) | 73 (22.2) |  |
 Allergic rhinitis |  |  |  | 0.003 |
  No | 1226 (74.5) | 1002 (76.1) | 224 (68.1) |  |
  Yes | 419 (25.5) | 314 (23.9) | 105 (31.9) |  |
 Asthma |  |  |  | 0.06 |
  No | 1477 (89.8) | 1191 (90.5) | 286 (86.9) |  |
  Yes | 168 (10.2) | 125 (9.50) | 43 (13.1) |  |
 Atopic dermatitis |  |  |  | 0.10 |
  No | 1555 (94.5) | 1250 (95.0) | 305 (92.7) |  |
  Yes | 90 (5.47) | 66 (5.02) | 24 (7.29) |  |