Age-adjusted mean values and proportions of characteristics according to the categories of work-related psychosocial factors among workers aged 20–59 years
| Support from supervisors | Support from co-workers | Job satisfaction | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| The quartiles of scores for social support | Q4 | Q3 | Q2 | Q1 | Q4 | Q3 | Q2 | Q1 | ||||
| Score; with lower scores indicating greater levels of support | 6–3 points | 8–7 points | 9 points | 12–10 points | 5–3 points | 7–6 points | 8 points | 12–9 points | Satisfied | Relatively satisfied | Somewhat dissatisfied | Dissatisfied |
| Men, n=1092 | ||||||||||||
| n | 285 | 332 | 232 | 243 | 200 | 351 | 226 | 315 | 136 | 638 | 234 | 84 |
| Age (years) | 40.0 (0.6) | 42.7 (0.5) | 40.3 (0.7) | 41.2 (0.6) | 40.6 (0.6) | 43.0 (0.7) | 41.4 (0.5) | 39.6 (0.7) | 39.6 (0.9) | 41.6 (0.4) | 41.1 (0.7) | 40.4 (1.1) |
| Current smoker (%) | 32.2 | 37.3 | 28.4 | 32.5 | 37.0 | 31.6 | 32.3 | 32.7 | 31.6 | 31.3 | 36.8 | 38.1 |
| Have an exercise habit (%) | 32.3 | 26.2 | 27.2 | 27.6 | 29 | 29.3 | 27 | 27.6 | 37.5 | 28.2 | 23.9 | 26.2 |
| Short sleep (%) | 6.0 | 2.7 | 3.0 | 8.2 | 3.5 | 5.1 | 3.5 | 6.3 | 3.7 | 4.4 | 3.8 | 13.1† |
| Overwork (%) | 14.7 | 12.3 | 14.7 | 20.6 | 13.0 | 13.7 | 19.0 | 15.9 | 11.8 | 14.4 | 19.7* | 15.5 |
| Body mass index ≥25 (%) | 25.6 | 26.2 | 26.7 | 25.9 | 23.5 | 24.2 | 29.2 | 27.6 | 22.8 | 27.0 | 26.5 | 23.8 |
| Personal consumption expenditure (×10 000 JPY/month) | 29.1 | 32.2 | 28.7 | 27.6 | 26.3 | 34.7* | 28.6 | 26.7 | 32.8 | 28.8 | 28.9 | 32.6 |
| Severe depressive symptoms (%) | 13.7 | 17.2 | 23.3† | 41.6‡ | 11.5 | 14.8 | 19.5* | 41.9‡ | 8.8 | 13.5 | 38.5‡ | 75.0‡ |
| Chronic pain (%; number of participants with chronic pain, n=309) | 23.5 (67) | 25.9 (86) | 30.6 (71) | 35.0† (85) | 25.0 (50) | 21.4 (75) | 30.1 (69) | 36.5† (115) | 19.9 (27) | 25.7 (164) | 32.1* (75) | 51.2‡ (43) |
| Intensity of pain of participants with chronic pain (Numerical Rating Scale) | 7.0 | 7.0 | 6.9 | 6.9 | 7.2 | 7.0 | 7.0 | 6.8 | 6.4 | 7.1* | 6.9 | 7.0 |
| Women, n=672 | ||||||||||||
| n | 160 | 210 | 110 | 192 | 149 | 215 | 95 | 213 | 74 | 411 | 134 | 53 |
| Age (years) | 38.9 (0.7) | 38.4 (0.9) | 40.1 (0.7) | 40.2 (0.8) | 38.7 (0.7) | 40.3 (1.0) | 39.6 (0.7) | 40.0 (0.8) | 40.3 (1.2) | 39.8 (0.5) | 38.9 (0.9) | 37.2 (1.4) |
| Current smoker (%) | 19.4 | 21.9 | 21.8 | 17.7 | 22.1 | 22.8 | 18.9 | 16.4 | 20.3 | 19.2 | 20.9 | 24.5 |
| Have an exercise habit (%) | 26.9 | 19.5 | 18.2 | 18.8 | 19.5 | 22.3 | 25.3 | 18.3 | 27.0 | 23.6 | 11.9 | 13.2 |
| Short sleep (%) | 4.4 | 4.3 | 1.8 | 6.3 | 3.3 | 4.2 | 7.4 | 4.2 | 1.4 | 4.1 | 7.5* | 3.8 |
| Overwork (%) | 5.6 | 5.2 | 1.8 | 3.1 | 5.4 | 4.7 | 2.1 | 3.8 | 6.8 | 4.4 | 3.7 | 0 |
| Body mass index ≥25 (%) | 13.1 | 13.3 | 15.5 | 14.1 | 12.8 | 15.8 | 10.5 | 14.1 | 9.5 | 14.8 | 17.2 | 3.8 |
| Personal consumption expenditure (×10 000 JPY/month) | 25.6 | 27.3 | 29.5 | 24.6 | 24.3 | 27.3 | 26.2 | 27.3 | 24.2 | 25.8 | 30.1 | 26.3 |
| Severe depressive symptoms (%) | 10.6 | 23.3† | 27.3† | 43.2‡ | 12.1 | 23.3* | 25.3* | 40.8‡ | 10.8 | 16.1 | 46.3‡ | 81.1‡ |
| Chronic pain (%; number of participants with chronic pain, n=223) | 30.0 (48) | 31.4 (66) | 37.2 (41) | 35.4 (68) | 33.6 (50) | 31.6 (68) | 26.3 (25) | 37.6 (80) | 29.7 (22) | 29.2 (120) | 44.0* (59) | 41.5 (22) |
| Intensity of pain of participants with chronic pain (Numerical Rating Scale) | 7.5 | 6.9 | 7.4 | 7.8 | 7.5 | 7.2 | 6.8* | 7.6 | 7.4 | 7.2 | 7.7 | 7.5 |
Test for significance from the category of Q4, or satisfied.
In parentheses: SEs.
The quartiles of scores for social support from supervisors and from co-workers were calculated, and classified as low (Q1), intermediate (Q2; Q3) or high (Q4).
*p<0.05, †<0.01, ‡<0.001.