Total subjects (n = 2266) | Subjects without depressive mood (n = 1771) | Subjects with depressive mood (n = 495) | P value | |
---|---|---|---|---|
Age (year) | 43.5 ± 9.8 | 44.0 ± 9.8 | 41.7 ± 9.3 | <0.001** |
Proportion of women (%) | 10.6 | 11.0 | 9.3 | 0.273 |
Body mass index (kg/m2) | 23.1 ± 3.3 | 23.0 ± 3.2 | 23.3 ± 3.5 | 0.209 |
Baseline characteristics | ||||
Systolic blood pressure (mmHg) | 123.4 ± 16.1 | 123.7 ± 16.1 | 122.2 ± 16.0 | 0.081 |
Diastolic blood pressure (mmHg) | 77.1 ± 12.0 | 77.1 ± 12.0 | 77.0 ± 11.9 | 0.760 |
Total cholesterol (mg/dL) | 200.0 ± 35.1 | 200.2 ± 35.2 | 199.1 ± 34.5 | 0.582 |
Triglyceride (mg/dL) | 125.8 ± 180.0 | 125.4 ± 195.3 | 127.4 ± 104.5 | 0.840 |
HDL cholesterol (mg/dL) | 61.8 ± 16.5 | 62.0 ± 16.3 | 61.2 ± 17.4 | 0.424 |
Fasting plasma glucose (mg/dL) | 95.0 ± 23.2 | 95.1 ± 21.7 | 94.9 ± 28.0 | 0.933 |
AST (IU/L) | 23.7 ± 18.3 | 23.6 ± 19.7 | 24.0 ± 11.8 | 0.752 |
ALT (IU/L) | 25.8 ± 18.1 | 25.5 ± 18.1 | 26.7 ± 18.0 | 0.245 |
γ-GTP (IU/L) | 47.4 ± 56.8 | 47.1 ± 55.9 | 48.5 ± 60.2 | 0.676 |
SES factors | ||||
Years of education (year) | 14.5 ± 2.5 | 14.6 ± 2.5 | 14.4 ± 2.5 | 0.320 |
Proportion of management position (%) | 22.7 | 24.4 | 16.6 | <0.001** |
Years of continuous employment (year) | 20.6 ± 11.6 | 21.1 ± 11.7 | 19.2 ± 11.1 | 0.001** |
Working hours (hour/week) | 46.6 ± 7.2 | 46.5 ± 7.1 | 47.0 ± 7.6 | 0.185 |
Annual household income (ten thousands yen/year) | 704.4 ± 297.5 | 717.9 ± 303.3 | 656.3 ± 270.7 | <0.001** |
Adjusted annual household income (ten thousands yen/year) | 443.0 ± 188.5 | 446.1 ± 188.7 | 431.8 ± 187.7 | 0.134 |
Number of families (n) | 2.9 ± 1.4 | 2.9 ± 1.4 | 2.8 ± 1.5 | 0.018* |
Job stress scores | ||||
Job Demands | 4.7 ± 2.5 | 4.5 ± 2.4 | 5.5 ± 2.6 | <0.001** |
Job Control | 3.0 ± 1.4 | 3.0 ± 1.4 | 2.7 ± 1.4 | <0.001** |
Job Strain | 4.0 ± 3.4 | 3.7 ± 3.1 | 5.2 ± 4.0 | <0.001** |
Worksite Support | 11.8 ± 1.8 | 11.9 ± 1.6 | 11.3 ± 2.0 | <0.001** |
K6 Score | 5.1 ± 4.6 | 3.2 ± 2.6 | 12.2 ± 3.3 | <0.001** |
Daily folate intake (μg/day) | 295.6 ± 127.3 | 297.6 ± 125.9 | 288.5 ± 131.9 | 0.162 |
Energy-adjusted folate intake (μg/1000 kcal·day) | 163.0 ± 56.9 | 165.0 ± 57.4 | 155.8 ± 54.7 | 0.001** |