Nutritonal iron intake (mg/day) | Period (weeks of gestation) | Frequency of anemia | OR | CI 95% | p |
| 14 - 19 | 39/39 (100%) | 2.2 | 1.7 - 2.9 | 0.101 |
<48 | 28 - 32 | 43/44 (97.7%) | 3.1 | 0.3 - 35.5 | 0.358 |
| At term | 38/39 (97.4%) | 2.3 | 0.2 - 26.6 | 0.459 |
| 14 - 19 | 39/39 (100%) | 2.3 | 1.7 - 2.9 | <0.05 |
<47 | 28 - 32 | 43/44 (97.7%) | 4.8 | 0.5 - 48.3 | 0.179 |
| A term | 38/39 (97.4%) | 3.6 | 0.4 - 35.9 | 0.267 |
| 14 - 19 | 38/39 (97.4%) | 15.2 | 1.8 - 126.2 | <0.01 |
<35 | 28 - 32 | 41/44 (93.2%) | 4.9 | 1.2 - 20.7 | <0.03 |
| A term | 35/39 (89.7%) | 2.2 | 0.6 - 8.2 | 0.198 |
| 14 - 19 | 11/39 (28.2%) | 13.4 | 1.6 - 109.9 | <0.01 |
<21 | 28 - 32 | 11/44 (25%) | 9.7 | 1.2 - 79.5 | <0.02 |
| At term | 8/39 (20.5%) | 2 | 0.6 - 7.3 | 0.230 |
| 14 - 19 | 7/39 (17.9%) | 0.5 | 0.4 - 0.6 | <0.01 |
<19 | 28 - 32 | 7/44 (15.9%) | 0.6 | 0.5 - 0.7 | <0.03 |
| At term | 5/39 (12.8%) | 2.4 | 0.4 - 13.4 | 0.262 |
| 14 - 19 | 4/39 (10.3%) | 0.5 | 0.4 - 0.6 | 0.071 |
<18 | 28 - 32 | 4/44 (9.1%) | 0.6 | 0.5 - 0.7 | 0.118 |
| At term | 3/39 (7.7%) | 2.8 | 0.3 - 28.6 | 0.349 |