Table 1. Characteristics of 25,875 Men According to Smoking Status in Baseline and 5-Year Surveys in the Japan Public Health Center-Based Prospective Study.
| Overall | Never smokers | Former smokers | Continuous smokers | New quitters2 | |
| n | 25,875 | 6,265 | 5,913 | 11,813 | 1,884 |
| Demographic characteristics | |||||
| Mean Age at 5-year survey (SD) | 56.3 (7.7) | 56.4 (7.2) | 57.9 (8.0) | 55.1 (7.4) | 57.5 (8.0) |
| Family history of diabetes (%) | 8.3 | 8.3 | 7.2 | 9.0 | 7.4 |
| Behavioral characteristics | |||||
| Alcohol consumption (%) | |||||
| ≥1 day per week | 68.5 | 62.8 | 71.0 | 71.3 | 62.3 |
| Physical activity level (METS/day)1 | 33.9 (6.7) | 34.1 (6.8) | 33.7 (6.7) | 34.0 (6.8) | 33.5 (6.7) |
| Leisure-time physical activity (%) | |||||
| ≥1 day per week | 20.8 | 23.6 | 25.8 | 16.7 | 20.7 |
| Clinical variables | |||||
| History of hypertension (%) | 16.7 | 17.2 | 21.8 | 13.2 | 20.2 |
| Weight related variables | |||||
| Mean weight at baseline (SD), kg | 63.2 (8.6) | 63.8 (8.5) | 63.9 (8.5) | 62.6 (8.6) | 63.0 (8.7) |
| Mean weight at 5-year survey (SD), kg | 63.5 (8.8) | 64.1 (8.7) | 64.1 (8.6) | 62.7 (8.9) | 64.3 (9.1) |
| Mean weight change (SD), kg | 0.3 (3.6) | 0.3 (3.5) | 0.2 (3.5) | 0.2 (3.6) | 1.3 (4.3) |
| Mean weight change % of baseline weight | 0.6 | 0.6 | 0.4 | 0.4 | 2.2 |
| Weight change > = 3 kg (%) | 20.9 | 20.0 | 19.7 | 19.6 | 35.5 |
| Mean BMI at baseline (SD), kg/m2 | 23.4 (2.7) | 23.9 (2.7) | 23.8 (2.7) | 23.0 (2.7) | 23.3 (2.7) |
| Mean BMI at 5-year survey (SD), kg/m2 | 23.5 (2.8) | 24.0 (2.8) | 23.8 (2.7) | 23.1 (2.8) | 23.8 (2.9) |
| Mean change of BMI (SD), kg/m2 | 0.1 (1.5) | 0.1 (1.5) | 0.1 (1.5) | 0.1 (1.5) | 0.5 (1.8) |
| Mean BMI change % of baseline BMI | 0.6 | 0.6 | 0.5 | 0.4 | 2.3 |
| Smoking related variables | |||||
| Mean intensity of smoking, cigarettes/day | 23.9 (14.0) | 22.5 (11.4) | 19.5 (11.2) | ||
| Mean duration of smoking, years reported | 21.3 (10.2) | 35.1 (7.7) | 32.7 (9.3) | ||
| Mean pack-Year | 26.9 (21.5) | 38.8 (20.2) | 32.0 (19.5) | ||
| Mean years since quitting1 | 13.0 (8.4) |
1
The numbers differ as a result of missing data for physical activity level for which it was 21,553, and years since quitting of former smokers for which it was 5871.
2
Who stopped smoking between the baseline and 5-year surveys.