Attacks of SOB | Wheezing | Asthmatic symptom complex | Asthma | Asthma medicines | Chronic productive cough | |
Subjects n | 477 | 353 | 291 | 271 | 402 | 300 |
Age in 1986 yrs | ||||||
36–37 | 1 | 1 | 1 | 1 | 1 | 1 |
51–52 | 1.4 (0.99–1.9) | 1.4 (0.99–2.1) | 1.6 (1.1–2.4) | 1.3 (0.87–1.9) | 0.86 (0.62–1.2) | 2.5 (1.7–3.7) |
66–67 | 0.99 (0.78–1.3) | 1.3 (0.99–1.7) | 1.2 (0.93–1.7) | 1.1 (0.83–1.5) | 1.0 (0.79–1.3) | 2.1 (1.6–2.8) |
Sex | ||||||
Male | 1 | 1 | 1 | 1 | 1 | 1 |
Female | 1.3 (1.0–1.6) | 0.95 (0.72–1.2) | 1.1 (0.82–1.5) | 1.5 (1.1–2.1) | 1.4 (1.1–1.8) | 1.0 (0.76–1.4) |
Family history of asthma | ||||||
No | 1 | 1 | 1 | 1 | 1 | 1 |
Yes | 2.7 (2.2–3.3) | 2.3 (1.8–2.9) | 2.9 (2.2–3.7) | 3.9 (3.0–5.0) | 2.6 (2.1–3.3) | 1.6 (1.3–2.1) |
Smoking habits 1986–1996 | ||||||
Persistent nonsmokers | 1 | 1 | 1 | 1 | 1 | 1 |
Persistent ex-smokers | 1.4 (1.1–1.9) | 1.5 (1.1–2.0) | 1.7 (1.2–2.5) | 2.0 (1.5–2.8) | 1.7 (1.3–2.2) | 1.6 (1.2–2.2) |
Persistent smokers | 1.6 (1.2–2.2) | 2.7 (2.0–3.6) | 2.4 (1.7–3.5) | 1.4 (0.95–2.0) | 1.5 (1.1–2.0) | 2.5 (1.8–3.4) |
Starters | # | # | # | 1.3 (0.17–10) | 0.70 (0.092–5.4) | # |
Re-starters | 1.2 (0.52–2.7) | 2.0 (0.87–4.7) | 1.9 (0.73–5.1) | 0.99 (0.30–3.3) | 0.95 (0.37–2.5 ) | 0.80 (0.19–3.3) |
Quitters | 2.2 (1.6–3.0) | 2.2 (1.6–3.2) | 2.6 (1.8–3.8) | 2.0 (1.4–3.0) | 1.7 (1.2–2.3) | 1.9 (1.3–2.9) |
Data are presented as odds ratio (95% confidence interval), unless otherwise indicated. Multiple logistic regression analyses were performed; other variables included in the model were socio-economic class and occupational exposure to dust, gases or fumes. SOB: shortness of breath; #: too few cases.