Table 3. Distribution of folate and vitamin B12 status in patients with major depressive disorder, in different age, and sex groups .
| Variable | Groups | Folate (ng/ml) | Vitamin B12(pg/ml) | ||
| Deficient n (%) | Normal n (%) | Deficient n(%) | Normal n (%) | ||
| Age (yr) | 18-30 (n=29) | 17(58.6) | 12(41.4) | 14(48.3) | 15(51.7) |
| 31-50 (n=33) | 13(39.4) | 20(60.6) | 18(54.5) | 15(45.5) | |
| 51-70 (n=8) | 6(75) | 2(25) | 3(37.5) | 5(62.5) | |
| Sex | Male (n=16) | 11(68.8) | 5(31.3) | 8(50) | 8(50) |
| Female (n=54) | 25(46.3) | 29(53.7) | 27(50) | 27(50) | |
Plasma folate and B12 deficiency were defined as: plasma folate and B12 less than 3 ng/ml, and 200 pg/ml, respectively.