Subjects n | 851 | 1086 | 1937 |
Age years (mean±sd) | 50.9±14.9 | 42.2±15.6 | 46.1±15.9 |
Sex | | | |
Female | 59.3 (505) | 46.7 (507) | 52.3 (1012) |
Male | 40.7 (346) | 52.9 (575) | 47.6 (921) |
Level of education# | | | |
High school equiv. | 22.1 (188) | 22.2 (241) | 22.2 (429) |
Adv. techn. college equiv. | 12.9 (110) | 15.0 (163) | 14.1 (273) |
Secondary school equiv. | 27.1 (231) | 30.4 (330) | 29.0 (561) |
Junior high school equiv. | 36.1 (307) | 27.7 (300) | 31.3 (607) |
No qualification | 1.8 (15) | 4.6 (50) | 3.4 (65) |
Cigarettes/day (mean±sd) | 14.7±9.9 | 13.8±9.6 | 13.8±9.3 |
Time spent with urges to smoke [25]¶ (mean± sd) | 3.1±1.5 | 2.8±1.5 | 2.9±1.5 |
Strength of urges to smoke [25]¶ (mean± sd) | 2.1±1.0 | 2.0±0.9 | 2.0±0.9 |
Motivation to stop smoking [35] (mean±sd)+ | 3.4±1.8 | 3.2±1.8 | 3.3±1.8 |