Association between atopy measured by skin test reaction and specific serum IgE
| Negative (%) | Positive (%) | OR (95% CI) | |
| Skin test ⩾3 mm more than control with corresponding allergen: | |||
| Specific mite IgE4-150 | 73/305 (23.9) | 19/36 (52.8) | 3.55 (1.73 to 7.30) |
| Specific cockroach IgE | 48/325 (14.8) | 9/22 (40.9) | 4.00 (1.59 to 10.0) |
| Specific cat IgE | 25/324 (7.7) | 4/23 (17.4) | 2.52 (0.79 to 8.02) |
| Any skin test 3 mm more than control: | |||
| Specific mite IgE4-150 | 59/257 (23.0) | 33/84 (39.3) | 2.17 (1.27 to 3.70) |
| Specific cockroach IgE | 34/261 (13.0) | 23/86 (26.7) | 2.44 (1.33 to 4.47) |
| Specific cat IgE | 18/261 (6.9) | 11/86 (12.8) | 1.98 (0.89 to 4.40) |
↵4-150 Mite IgE performed in 341 blood samples.