Table 1 Smoking Status among smoker and non-smoker, by sex
From: Tobacco smoke and all-cause mortality and premature death in China: a cohort study
Men (N = 7600) | Women (N = 8681) | |
|---|---|---|
Non-smoker | 2194 (28.65) | 8362(92.46)1 |
Ex-smoker | 1182 (15.44) | 164 (1.81)1 |
Smoker | 4281 (55.91) | 518 (5.73)1 |
Smoking duration (years) | ||
Mean (SD) | 35.2 (12.4) | 32.8 (16.8)1 |
< 20 | 514 (9.41) | 155 (22.73)1 |
20–39 | 3002 (54.95) | 280 (41.06) |
≥ 40 | 1947 (35.64) | 247 (36.22) |
Cigarettes/day | ||
Mean (SD) | 19.6 (12.6) | 12.6 (9.6)1 |
< 20 | 1518 (36.38) | 250 (65.27)1 |
20–39 | 2100 (50.32) | 120 (31.33) |
≥ 40 | 555 (13.30) | 13 (3.39) |
Age at starting smoking (years) | ||
Mean (SD) | 22.2 (8.0) | 26.3 (13.2)1 |
< 13 | 196 (3.59) | 46 (6.74)1 |
13–17 | 1079 (19.75) | 150 (21.99) |
18–25 | 2650 (48.51) | 185 (27.13) |
≥ 25 | 1538 (28.15) | 301 (44.13) |
Age at ceasing smoking (years) | ||
Mean (SD) | 52.1 (13.8) | 52.3 (15.5) |
< 40 | 186 (15.74) | 27 (16.46) |
< 50 | 259 (21.91) | 33 (20.12) |
< 60 | 361 (30.54) | 47 (28.66) |
≥ 60 | 376 (31.81) | 57 (34.76) |