| Cases (n = 50) | Controls (n = 50) | P value | |
| Age (years) | 68.0 ± 5.5 | 67.4 ± 5.7 | 0.801 |
| Female gender | 32 (50%) | 32 (50%) | 1.000 |
| Education | <0.001 | ||
| Illiterate | 22 (71.0%) | 9 (29.0%) | |
| Primary | 14 (66.7%) | 7 (33.3%) | |
| Preparatory | 4 (25.0%) | 12 (75.0%) | |
| Secondary | 5 (50%) | 5 (50%) | |
| High education | 5 (22.7%) | 17 (77.3%) | |
| Body mass index (kg/m2) (Mean ± SD) | 25.0 ± 7.7 | 28.4 ± 7.5 | 0.010 |
| Family history of VD | 12 (75.0%) | 4 (25.0%) | 0.060 |
| Hypertension | 32 (59.3%) | 22 (40.7%) | 0.033 |
| Hypertension duration (years) | 18.3 ± 8.9 | 14.6 ± 9.9 | 0.027 |
| Diabetes mellitus | 25 (62.5%) | 15 (37.5%) | 0.026 |
| DM duration (years) | 23.8 ± 10. 9 | 15.1 ± 11.3 | 0.007 |
| IHD | 6 (50.0%) | 6 (50.0%) | 0.978 |
| Heart failure | 8 (66.7%) | 4 (33.3%) | 0.202 |
| Atrial fibrillation | 5 (71.4%) | 2 (28.6%) | 0.158 |
| Geriatric depression scale-15 (Mean ± SD) | 1.85 ± 0.55 | 1.72 ± 0.59 | 0.790 |
| High cholesterol | 7 (63.6%) | 4 (36.4%) | 0.176 |
| High TG | 11 (55.0%) | 9 (45.0%) | 0.541 |
| High LDL-C | 18 (69.2%) | 8 (30.8%) | 0.023 |
| Low HDL-C | 22 (62.9%) | 13 (37.1%) | 0.049 |
| Apo E4 allele | 22 (75.9%) | 7 (24.1%) | 0.001 |