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. 2023 Oct 20;18(10):e0292729. doi: 10.1371/journal.pone.0292729

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)