Table 5—

Increase in dyspnoea 1, 2, or 3–4 grades by independent variables sex, age, and pack-yrs in a multinominal logistic regression model

Δ1 increaseΔ2 increaseΔ3–4 increase
Compared to no increase in dyspnoea
Sex
 Females (compared to males)1.6 (1.2–2.2)2.4 (1.7–3.4)1.8 (1.0–3.1)
Age in 1985 (compared to 15–29) yrs
 30–490.9 (0.6–1.2)0.8 (0.5–1.2)1.0 (0.5–2.0)
 50–701.4 (0.9–2.0)2.1 (1.5–3.0)2.4 (1.3–4.6)
Pack-yrs
 Per 10 pack-yrs increase1.3 (1.1–1.4)1.1 (1.0–1.3)1.2 (1.0–1.5)
  • Data are presented as odds ratio (95% confidence intervals)