Estimates for the interaction between gas cooking and GSTM1 null genotype on bronchial responsiveness in the European Community Respiratory Health Survey II, restricting the analysis according to cooking characteristics
| Cooking characteristics | N | β (95% CI) | p Value |
|---|---|---|---|
| Gas hobs (without gas oven) vs electricity | 1565 | −0.53 (−1.06 to −0.001) | 0.050 |
| Gas hobs (with gas oven) vs electricity | 1393 | −0.85 (−1.43 to −0.27) | 0.004 |
| Bottled gas vs electricity | 814 | −1.59 (−2.98 to −0.20) | 0.025 |
| Gas mains vs electricity | 1934 | −0.60 (−1.04 to −0.15) | 0.009 |
| Cooked every day in the last four weeks | 1578 | −0.72 (−1.32 to −0.12) | 0.018 |
| Cooked every day in the last four weeks (ventilated kitchen) | 1205 | −0.50 (−1.04 to 0.04) | 0.071 |
| Cooked every day in the last four weeks (unventilated kitchen) | 373 | −1.47 (−2.54 to −0.40) | 0.007 |