Table 1 Characteristics of the study population*
From: Mortality in GOLD stages of COPD and its dependence on symptoms of chronic bronchitis
Men | Women | |
|---|---|---|
Number (n) | 14 630 | 7414 |
Smoker | 7221 (49.4) | 2961 (39.9) |
Exsmoker | 3942 (26.9) | 1169 (15.8) |
Never-smoker | 3467 (23.7) | 2961 (39.9) |
Age | 46.4 (5.7) | 47.5 (7.8) |
Follow-up time | 22.2 (5.7) | 20.2 (4.7) |
Person-years | 352 324 | 150 050 |
Deaths | 3674 (25.1) | 832 (11.2) |
Reference** | 10215 (69.8) | 5706 (77) |
Not classif*** | 1453 (9.9) | 821 (11.0) |
Gold 0 | 318 (2.2) | 175 (2.4) |
Gold 1 | 1443 (9.9) | 336 (4.5) |
Gold 2 | 1010 (6.9) | 316 (4.3) |
Gold 3 | 149 (1.0) | 48 (0.6) |
Gold 4 | 42 (0.3) | 12 (0.2) |
Comorbidity**** | 676 (4.6) | 489 (6.6) |