Asthma and hay fever according to use of HRT, stratified by smoking history
| No HRT(%) | HRT(%) | OR (95% CI)* | p value | |
|---|---|---|---|---|
| *From logistic regression models with adjustment for smoking habits, BMI (within tertile), age, centre, and type of dwelling (as a proxy for social class). | ||||
| †Asthma medication and/or asthma attacks in the last 12 months. | ||||
| ‡Wheeze in the last 12 months. | ||||
| §Hay fever or nasal allergies. | ||||
| Never smokers (n = 907) | ||||
| Asthma† | 5.3 | 9.2 | 2.42 (1.24 to 4.72) | 0.010 |
| Wheeze‡ | 13.1 | 17.2 | 1.94 (1.18 to 3.19) | 0.008 |
| Hay fever§ | 23.6 | 30.4 | 1.85 (1.23 to 2.78) | 0.003 |
| Ex-smokers (n = 684) | ||||
| Asthma† | 8.1 | 9.7 | 1.20 (0.61 to 2.33) | 0.589 |
| Wheeze‡ | 14.9 | 19.5 | 1.66 (0.99 to 2.77) | 0.050 |
| Hay fever§ | 23.4 | 27.2 | 1.39 (0.89 to 2.18) | 0.143 |
| Smokers (n = 649) | ||||
| Asthma† | 9.1 | 11.5 | 1.41 (0.74 to 2.71) | 0.293 |
| Wheeze‡ | 31.9 | 33.5 | 1.34 (0.87 to 2.06) | 0.183 |
| Hay fever§ | 22.1 | 24.1 | 1.18 (0.73 to 1.91) | 0.488 |