Table 1. Characteristics of participants (N = 3,390).
| Characteristics | Study Participants, N (%) | Japanese Population*, N (%) |
|---|---|---|
| Sex | ||
| Man | 1,736(51.2) | 61,841,738(48.7) |
| Woman | 1,654(48.8) | 65,253,007(51.3) |
| Age | ||
| 20–24 Years | 264(7.8) | 5,968,127(7.5) |
| 25–39 Years | 953(28.1) | 22,016,647(27.5) |
| 40–54 Years | 1,109(32.7) | 26,325,318(32.9) |
| 55–69 Years | 1,064(31.4) | 25,614,123(32.0) |
| Education | ||
| Junior High School | 111(3.4) | 16,756,162(18.8) |
| High School | 1,265(38.2) | 41,400,268(46.5) |
| College | 774(23.4) | 13,187,048(14.8) |
| University/Graduate School | 1,158(35.0) | 17,716,535(19.9) |
| Employment | ||
| Employed | 2,502(73.8) | 58,919,036(57.5) |
| Housemaker/Housewife | 493(14.5) | 15,206,558(14.8) |
| Students | 102(3.0) | 6,196,077(6.0) |
| Unemployed/Retired | 293(8.6) | 22,224,112(21.7) |
| City Size | ||
| Metropolitan | 1014(29.9) | 36769964(28.9) |
| Midsize City | 1439(42.4) | 51969410(40.9) |
| Small City | 683(20.1) | 27397858(21.6) |
| Rural | 254(7.5) | 10957513(8.6) |
| Total | 3390 | 127,094,745 |
* As of National Census of Japan 2015