Table 1. Sociodemographic characteristics of the respondents.
| Total (n = 1,600) | Male | Female | |
|---|---|---|---|
| n (%) | 800 (50.0) | 800 (50.0) | |
| Age group (in years) | |||
| 20s (20–29) | 320 (20.0) | 160 (10.0) | 160 (10.0) |
| 30s (30–39) | 320 (20.0) | 160 (10.0) | 160 (10.0) |
| 40s (40–49) | 320 (20.0) | 160 (10.0) | 160 (10.0) |
| 50s (50–59) | 320 (20.0) | 160 (10.0) | 160 (10.0) |
| 60s (60–69) | 320 (20.0) | 160 (10.0) | 160 (10.0) |
| Educational attainment | |||
| Junior high school | 39 (2.4) | 22 (1.4) | 17 (1.1) |
| High school | 470 (29.4) | 214 (13.4) | 256 (16.0) |
| Vocational school | 204 (12.8) | 81 (5.1) | 123 (7.7) |
| Junior college/ Higher professional school | 194 (12.1) | 42 (2.6) | 152 (9.5) |
| University | 624 (39.0) | 392 (24.5) | 232 (14.5) |
| Graduate school | 69 (4.3) | 49 (3.1) | 20 (1.3) |
| Occupation | |||
| Self-employed | 98 (6.1) | 80 (5.0) | 18 (1.1) |
| Healthcare worker | 62 (3.9) | 20 (1.3) | 42 (2.6) |
| Office worker | 620 (38.8) | 440 (27.5) | 180 (11.3) |
| Public officer | 62 (3.9) | 48 (3.0) | 14 (0.9) |
| House worker | 253 (15.8) | 5 (0.3) | 248 (15.5) |
| Student | 48 (3.0) | 25 (1.6) | 23 (1.4) |
| Part-time worker | 238 (14.9) | 55 (3.4) | 183 (11.4) |
| Unemployed | 207 (12.9) | 120 (7.5) | 87 (5.4) |
| Other | 20 (1.3) | 9 (0.6) | 11 (0.7) |
| Residential area | |||
| Hokkaido region | 99 (6.2) | 52 (3.3) | 47 (2.9) |
| Tohoku region | 93 (5.8) | 45 (2.8) | 48 (3.0) |
| Kanto region | 614 (38.4) | 329 (20.6) | 285 (17.8) |
| Chubu region | 238 (14.9) | 104 (6.5) | 134 (8.4) |
| Kinki region | 312 (19.5) | 161 (10.1) | 151 (9.4) |
| Chugoku region | 87 (5.4) | 48 (3.0) | 39 (2.4) |
| Shikoku region | 39 (2.4) | 15 (0.9) | 24 (1.5) |
| Kyushu region | 118 (7.4) | 46 (2.9) | 72 (4.5) |