Table 1 Descriptive distribution of the oral conditions by age, gender, education, income, and systemic diseases (n = 3930)
From: Association of oral health with various work problems: a cross-sectional study of Japanese workers
|  | n (%) | Self-reported oral health (%) | Number of teeth (%) | Bleed when brushing teeth (%) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Total | Excellent | Very good | Good | Fair | Poor | 19 or fewer teeth | 20 or more teeth | Always | Sometimes | None | |
Age | |||||||||||
 Under 30 | 625 (15.9) | 23.5 | 17.9 | 14.7 | 14.8 | 7.0 | 9.4 | 17.0 | 20.8 | 18.2 | 13.9 |
 30〜39 | 969 (24.7) | 30.3 | 27.0 | 24.8 | 20.4 | 20.4 | 17.1 | 25.9 | 28.9 | 27.8 | 22.0 |
 40〜49 | 1011 (25.7) | 22.8 | 26.1 | 26.2 | 24.9 | 29.6 | 24.6 | 25.9 | 24.5 | 25.5 | 26.0 |
 50〜59 | 888 (22.6) | 14.7 | 19.7 | 22.8 | 27.1 | 29.6 | 29.5 | 21.4 | 18.2 | 19.2 | 25.4 |
 Over 60 | 437 (11.1) | 8.8 | 9.3 | 11.5 | 12.8 | 13.4 | 19.4 | 9.7 | 7.5 | 9.3 | 12.7 |
Sex | |||||||||||
 Male | 2057 (52.3) | 45.3 | 50.3 | 53.4 | 54.6 | 54.9 | 62.5 | 50.7 | 56.0 | 51.8 | 52.4 |
 Female | 1873 (47.7) | 54.7 | 49.7 | 46.6 | 45.4 | 45.1 | 37.5 | 49.3 | 44.0 | 48.2 | 47.6 |
Educational attainment | |||||||||||
 1* | 1416 (36.0) | 30.3 | 27.2 | 37.1 | 42.9 | 53.5 | 45.9 | 34.4 | 52.2 | 36.8 | 34.2 |
 2* | 839 (21.3) | 20.2 | 22.4 | 22.2 | 19.8 | 16.2 | 18.9 | 21.8 | 17.0 | 20.7 | 22.2 |
 3* | 1675 (42.6) | 49.5 | 50.4 | 40.8 | 37.2 | 30.3 | 35.2 | 43.9 | 30.8 | 42.5 | 43.6 |
Income | |||||||||||
 2 < million yen | 577 (14.7) | 11.7 | 12.8 | 15.0 | 16.9 | 16.9 | 15.1 | 14.6 | 18.9 | 15.6 | 13.7 |
 2 ≥ to < 4 million yen | 1479 (37.6) | 37.1 | 35.5 | 38.2 | 38.7 | 39.4 | 39.1 | 37.4 | 39.0 | 37.9 | 37.3 |
 4 ≥ to < 6 million yen | 810 (20.6) | 20.2 | 23.3 | 19.6 | 19.7 | 21.1 | 21.9 | 20.4 | 18.2 | 22.0 | 19.8 |
 6 ≥ to < 8 million yen | 299 (7.6) | 9.8 | 9.7 | 6.0 | 7.6 | 7.7 | 8.9 | 7.4 | 8.8 | 6.7 | 8.2 |
 8 ≥ million yen | 210 (5.3) | 4.6 | 6.3 | 5.7 | 4.6 | 1.4 | 4.1 | 5.6 | 1.9 | 3.9 | 6.7 |
 Unknown | 555 (14.1) | 16.6 | 12.3 | 15.6 | 12.5 | 13.4 | 10.9 | 14.7 | 13.2 | 13.9 | 14.3 |
Diabetes | |||||||||||
 Absence | 3806 (96.8) | 98.0 | 98.8 | 96.5 | 95.0 | 95.8 | 93.2 | 97.4 | 93.7 | 97.6 | 96.5 |
 Presence | 124 (3.2) | 2.0 | 1.2 | 3.5 | 5.0 | 4.2 | 6.8 | 2.6 | 6.3 | 2.4 | 3.5 |
Industry | |||||||||||
 Primary industry | 305(7.8) | 10.4 | 6.8 | 7.9 | 7.7 | 7.0 | 9.8 | 7.4 | 7.5 | 7.2 | 8.2 |
 Secondary industry | 1097(27.9) | 24.8 | 26.6 | 28.5 | 28.8 | 31.7 | 29.7 | 27.6 | 33.3 | 27.8 | 27.6 |
 Tertiary industry | 2528(64.3) | 64.8 | 66.7 | 63.6 | 63.5 | 61.3 | 60.5 | 65.0 | 59.1 | 65.0 | 64.2 |