Table 1.
Descriptive statistics for Tokyo Early Adolescence Survey variables broken down by tobacco use
| Non-smokers | Light smokers | Moderate to heavy smokers | P values | |
| N (%) | 3739 (92.0) | 204 (5.0) | 120 (3.0) | |
| Purpose in life, mean (SD) | 57.3 (9.7) | 54.8 (9.8) | 52.6 (9.9) | <0.001 |
| Age, mean (SD) | 42.0 (4.1) | 41.2 (5.0) | 40.5 (4.8) | <0.001 |
| Education, n (%) | ||||
| Junior high school or lower | 22 (0.6) | 12 (5.9) | 9 (7.5) | <0.001 |
| High school | 512 (13.7) | 66 (32.4) | 48 (40.0) | |
| Technical or junior college | 1626 (43.5) | 89 (43.6) | 51 (42.5) | |
| 4-year university or higher | 1579 (42.2) | 37 (18.1) | 12 (10.0) | |
| Marital status, n (%) | ||||
| Yes | 3613 (96.6) | 182 (89.2) | 97 (80.8) | <0.001 |
| No | 126 (3.4) | 22 (10.8) | 23 (19.2) | |
| Family annual income, n (%) | ||||
| Less than 4 million yen | 285 (7.6) | 42 (20.6) | 31 (25.8) | <0.001 |
| 4–6 million yen | 1022 (27.3) | 74 (36.3) | 57 (47.5) | |
| 7–9 million yen | 1162 (31.1) | 55 (27.0) | 21 (17.5) | |
| More than 10 million yen | 1270 (34.0) | 33 (16.2) | 11 (9.2) | |
| Alcohol use, n (%) | ||||
| Non | 1160 (31.0) | 44 (21.6) | 43 (35.8) | <0.001 |
| Less than once a month | 563 (15.1) | 35 (17.2) | 9 (7.5) | |
| 2–4 times a month | 689 (18.4) | 24 (11.8) | 15 (12.5) | |
| 2–3 times a week | 594 (15.9) | 21 (10.3) | 16 (13.3) | |
| More than four times a week | 733 (19.6) | 80 (39.2) | 37 (30.8) | |
| K6 (psychological distress), mean (SD) | 2.9 (3.3) | 3.4 (3.4) | 3.5 (3.9) | 0.026 |