| Parameter | Occupational group | P-value | ||
| Farmers (n = 65 ) | Civil servants (n = 56 ) | Students (n = 39 ) | ||
| Haemoglobin (g/dl) | 12.5 ± 2.1 | 13.3 ± 2.9 | 13.21 ± 2.0 | 0.01 |
| Haematocrit (%) | 41.5 ± 4.0 | 43.8 ± 2.5 | 42 ± 2.5 | 0.01 |
| Serum ferritin (ng/ml) | 78.02 ± 49.10 | 92.5 ± 36 | 87.8 ± 50.5 | 0.01 |