Table 1 Characteristics of participants
From: Altitude and COPD prevalence: analysis of the PREPOCOL-PLATINO-BOLD-EPI-SCAN study
Characteristics | Total n = 30,874 | |
|---|---|---|
Sex, n (%) | Female | 17,230 (55.8) |
Male | 13,644 (44.2) | |
Smoking status, n (%) | Never-smoker | 15,308 (49.6) |
Former smoker | 8479 (27.5) | |
Current smoker | 7065 (22.9) | |
Missing information | 22 (0.07) | |
Age in years, mean (± SD) | 56.1 (±11.3) | |
Age in decades, n (%) | 40–49 | 10,828 (35.1) |
50–59 | 9038 (29.3) | |
60–69 | 6466 (20.9) | |
70–79 | 3691 (12.0) | |
≥80 | 851 (2.8) | |
Geographical altitude in meters, mean (± SD) | 521.8 (±687.8) | |
Geographical altitude, n (%) | 0–250 | 15,823 (51.3) |
250–500 | 3437 (11.1) | |
500–750 | 2737 (8.9) | |
750–1500 | 4899 (15.9) | |
>1500 | 3978 (12.9) | |