| Variable (Income Groups) | N | % | Hb gram/dL | |
| Minimum | Maximum | |||
| 15,000 - 20,000 | 928 | 55.04 | 9.4 | 14.8 |
| 21,000 - 27,000 | 518 | 30.72 | 10.6 | 14.8 |
| 28,000 - 50,000 | 240 | 14.23 | 10.6 | 15.4 |