| Socio-economic condition | Normal Hb level | Anemic (Hb < 11.5 g/dL) | Total |
| n (%) | n (%) | n = 420 | |
| Lower class < 15,000 | 53 (44.2) | 67 (55.8) | 120 |
| Middle class = 15,000 up to 20,000 | 105 (67.7) | 50 (32.2) | 155 |
| Upper class > 20,000 | 119 (82.0) | 26 (17.9) | 145 |
| Total | 277 (65.9) | 143 (34.0) | 420 |