Skin tests and family history of asthma in cases and controls (%)
| Risk factor |
Cases (n = 114) |
Controls (n = 202) |
p value (χ2 test) |
| Father asthma | 17.5 | 5.9 | 0.001 |
| Mother asthma | 14.9 | 7.9 | 0.05 |
| Sibling asthma | 60.5 | 15.8 | <0.001 |
| Any skin test +ve | 66.7 | 27.7 | <0.001 |
| D pteronyssinus | 64.0 | 22.3 | <0.001 |
| Cat | 26.3 | 9.4 | <0.001 |
| Cladosporiumsp | 14.9 | 4.5 | 0.001 |
| Cockroach | 8.8 | 2.0 | 0.004 |