Table 1. Baseline characteristics by smoking status: the Ibaraki Prefectural Health Study.
| Men | Women | ||||||||
| Non-smokers | Ex-smokers | Current smokers | Non-smokers | Ex-smokers | Current smokers | ||||
| <20 cigarettes/day | ≥20 cigarettes/day | <20 cigarettes/day | ≥20 cigarettes/day | ||||||
| Number of individuals | 7,335 | 9,155 | 5,125 | 11,403 | 59,832 | 461 | 2,021 | 1,052 | |
| Person-years | 127,605 | 152,646 | 79,956 | 193,438 | 1,091,277 | 7,807 | 34,492 | 17,926 | |
| Number of events | 31 | 46 | 29 | 62 | 127 | 1 | 0 | 0 | |
| Rate of events (per 1,000 person-years) |
0.24 | 0.30 | 0.36 | 0.32 | 0.12 | 0.13 | 0 | 0 | |
| Age, years, mean (SD) | 60.8 (10.2) | 62.6 (9.5) | 63.5 (9.1) | 57.8 (10.0) | 58.3 (10.2) | 56.4 (11.5) | 56.3 (11.2) | 53.5 (9.7) | |
| Alcohol intake, % | |||||||||
| Teetotaler | 43.6 | 35.3 | 32.6 | 30.6 | 91.9 | 65.1 | 69.3 | 66.3 | |
| Sometimes | 16.0 | 14.1 | 13.2 | 11.7 | 5.5 | 19.1 | 15.3 | 12.6 | |
| Every day | <3 units/day | 37.2 | 45.6 | 49.1 | 45.9 | 2.6 | 14.8 | 14.8 | 17.4 |
| ≥3 units/day | 3.1 | 4.9 | 5.1 | 11.8 | 0.0 | 1.1 | 0.5 | 3.7 | |
SD, standard deviation.