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| Characteristics | Current smoker (n = 128) | Former smoker (n = 106) | |
|---|---|---|---|
| n (%) | n (%) | ||
| Smoking time (years) | |||
| ≤ 10 | 47 (36.7) | 68 (64.2) | |
| > 10 | 81 (63.3) | 38 (35.8) | |
| Cigarettes consumed per day | |||
| 1–10 (light) | 82 (65.1) | − | |
| 11–20 (moderate) | 38 (30.2) | − | |
| > 20(more than a pack) (heavy) | 6 (4.8) | − | |
| Pack-year index (SD) | 26 (124) | − | |
| Smoking onset age (years) – mean (SD) | 17.2 (5.1) | 17.4 (4.9) | |
