Table 3 Characteristics of the participants/study population, by COPD status
From: LASSO type penalized spline regression for binary data
Characteristic | Summary Measure (total n = 6,564) | |||
|---|---|---|---|---|
| Â | COPD | NO COPD | ||
| Â | n = 1367 | (20.8%) | n = 5197 | (79.2%) |
Age | 65.2 | (11.2) | 57.0 | (10.8) |
Male | 755 | (55.2%) | 2286 | (44.0%) |
BMI | 27.3 | (5.3) | 27.9 | (5.7) |
Ever smoker (cigarette) | 943 | (69.0%) | 2623 | (50.5%) |
Ever smoker (pipe or cigarette) | Â | Â | Â | Â |
Never smoker | 406 | (29.7%) | 2543 | (48.9%) |
Ex smoker | 645 | (47.2%) | 2030 | (39.1%) |
Current smoker | 316 | (23.1%) | 624 | (12.0%) |
Pack Years | 22.9 | (24.6) | 10.5 | (17.0%) |
Average cigarette per day | 13.2 | (12.6) | 8.3 | (11.4) |
Duration of smoking (year) | 23.0 | (19.7) | 11.8 | (14.9) |
Smoking cessation | 943 | (69.0%) | 2623 | (50.5%) |
Occupation | Â | Â | Â | Â |
Hard rock mining | 34 | (2.5%) | 80 | (1.5%) |
Coal mining | 11 | (0.8%) | 12 | (0.2%) |
Working with asbestos | 59 | (4.3%) | 157 | (3.0%) |
Chemical/plastics manufacturing | 80 | (5.9%) | 231 | (4.4%) |
Foundry/steel milling | 39 | (2.9%) | 106 | (2.0%) |
Welding | 68 | (5.0%) | 172 | (3.3%) |
Saw-milling | 39 | (2.9%) | 103 | (2.0%) |