| Participation rate in the survey year 2019 (evaluating 2017-2018) | Participation rate in the survey year 2022 (evaluating 2020-2021) | Crude difference from the survey year 2019 to the survey year 2022 (95% CI) | Adjusted difference from the survey year 2019 to the survey year 2022 (95% CI) | |||
|---|---|---|---|---|---|---|
| Variables | % (participants/denominator) | % (participants/denominator) | % | p-Value | % | p-Value |
| Overall | 48.3 (51,428/106,446) | 47.1 (45,006/95,610) | −1.2 (−1.7 to −0.8) | <0.001 | −1.7 (−2.2 to −1.4) | <0.001 |
| Age category (years) | ||||||
| 40-44 | 55.1 (8,072/14,646) | 54.4 (6,088/11,196) | −0.7 (−2.0 to 0.5) | 0.238 | −1.2 (−2.3 to 0.1) | 0.061 |
| 45-49 | 55.2 (8,786/15,925) | 54.2 (7,455/13,766) | −1.0 (−2.2 to 0.1) | 0.080 | −2.2 (−3.3 to −1.1) | <0.001 |
| 50-54 | 55.1 (8,073/14,657) | 53.6 (7,416/13,838) | −1.5 (−2.7 to 0.3) | 0.012 | −1.9 (−3.1 to −0.8) | <0.001 |
| 55-59 | 52.5 (7,666/14,592) | 52.0 (6,709/12,903) | −0.5 (−1.7 to 0.6) | 0.371 | −1.0 (−2.2 to 0.1) | 0.084 |
| 60-64 | 46.2 (7,051/15,273) | 46.2 (6,351/13,735) | 0.1 (−1.1 to 1.2) | 0.901 | −1.5 (−2.6 to −0.3) | 0.011 |
| 65-69 | 40.0 (6,834/17,088) | 39.5 (5,625/14,253) | −0.5 (−1.6 to 0.6) | 0.342 | −1.7 (−2.8 to −0.6) | 0.002 |
| 70-74 | 34.7 (4,946/14,265) | 33.7 (5,362/15,919) | −1.0 (−2.1 to 0.08) | 0.071 | −1.8 (−2.8 to −0.7) | 0.001 |
| Living area | ||||||
| City with a population of ≥500 thousand people (government-designated city/23 cities of Tokyo) | 47.8 (10,216/21,368) | 46.2 (8,888/19,252) | −1.6 (−2.6 to −0.7) | <0.001 | −1.9 (−2.8 to −0.9) | <0.001 |
| City with a population of 150-499 thousand people | 46.2 (14,176/30,704) | 45.1 (12,349/27,410) | −1.1 (−1.9 to −0.3) | 0.007 | −1.7 (−2.5 to −0.9) | <0.001 |
| City with a population of 50-149 thousand people | 48.4 (13,354/27,572) | 47.2 (11,424/24,193) | −1.2 (−2.1 to −0.4) | 0.006 | −1.8 (−2.7 to 1.0) | <0.001 |
| City with a population of <50 thousand people | 48.9 (6,482/13,252) | 48.3 (6,237/12,909) | −0.6 (−1.8 to 0.6) | 0.333 | −1.0 (−2.2 to 0.2) | 0.095 |
| Town/village | 53.1 (7,200/13,550) | 51.6 (6,108/11,846) | −1.6 (−2.8 to −0.3) | 0.012 | −2.4 (−3.6 to −1.2) | <0.001 |
| Educational level | ||||||
| Elementary/junior high school | 30.0 (2,350/7,826) | 28.3 (1,601/5,659) | −1.7 (−3.3 to −0.2) | 0.028 | −1.7 (−3.2 to −0.2) | 0.031 |
| High school | 44.4 (23,214/52,282) | 42.6 (18,955/44,518) | −1.8 (−2.5 to −1.2) | <0.001 | −1.8 (−2.4 to −1.2) | <0.001 |
| Vocational school/junior or technical college | 54.0 (17,531/32,485) | 51.6 (16,210/31,392) | −2.3 (−3.1 to −1.6) | <0.001 | −1.8 (−2.6 to −1.0) | <0.001 |
| University/graduate school | 60.2 (8,333/13,853) | 58.7 (8,240/14,041) | −1.5 (−2.6 to −0.3) | 0.013 | −1.1 (−2.2 to 0.03) | 0.056 |
| Health insurance plan | ||||||
| Employee insurance (insured person) | 58.5 (21,541/36,846) | 58.1 (20,456/35,205) | −0.4 (−1.1 to 0.4) | 0.332 | −0.5 (−1.2 to 0.2) | 0.197 |
| Employee insurance (dependent person) | 49.6 (15,177/30,572) | 47.1 (11,921/25,289) | −2.5 (−3.3 to −1.7) | <0.001 | −2.5 (−3.3 to −1.7) | <0.001 |
| National health insurance | 37.7 (14,710/39,028) | 36.0 (12,629/35,116) | −1.7 (−2.4 to −1.0) | <0.001 | −2.2 (−2.9 to −1.5) | <0.001 |
