From: Incidence of asthma and mortality in a cohort of young adults: a 7-year prospective study
 | Relative risk (IRR) | 95% C.I. | p-value |
---|---|---|---|
Sex | Â | Â | Â |
Men | 1 | Â | Â |
Women | 2.32 | 1.16–4.67 | 0.017 |
Birth cohort * | Â | Â | Â |
1946–1951 | 1 |  |  |
1951–1956 | 1.12 | 0.36–3.49 | 0.84 |
1956–1961 | 1.69 | 0.60–4.77 | 0.32 |
1961–1976 | 1.68 | 0.60–4.69 | 0.32 |
1966–1971 | 2.28 | 0.82–6.34 | 0.11 |
Urban area | Â | Â | Â |
Suburban area | 1 | Â | Â |
Urban area | 2.52 | 0.77–8.19 | 0.12 |
Asthma-like symptoms** | Â | Â | Â |
No | 1 | Â | Â |
Yes | 4.17 | 2.20–7.87 | <0.001 |
Allergic rhinitis | Â | Â | Â |
No | 1 | Â | Â |
Yes | 3.30 | 1.71–6.36 | <0.001 |
Smoking habits | Â | Â | Â |
Non smokers | 1 | Â | Â |
Ex-smokers | 0.49 | 0.15–1.65 | 0.25 |
Smokers | 0.33 | 0.15–0.73 | <0.01 |
Social class | Â | Â | Â |
Medium /High | 1 | Â | Â |
Low | 1.65 | 0.77–3.52 | 0.20 |