Table 1.
Background characteristics*
| Group | Former IDA | Nonanemic controls | |
|---|---|---|---|
| Total n | 27 | 28 | |
| Child | |||
| Age at preschool follow-up (y) | 3.9 ± 0.6 | 3.9 ± 0.5 | |
| Gender [% male (n)] | 74% (20) | 57% (16) | |
| Gestational age (wk) | 39.3 ± 1.0 | 39.3 ± 1.0 | |
| Birth weight (kg) | 3.43 ± 0.39 | 3.51 ± 0.42 | |
| Birth length (cm) | 50.4 ± 2.4 | 50.5 ± 1.7 | |
| Growth in infancy (12 mo) | |||
| Weight-for-age z-score | −0.03 ± 0.89 | −0.14 ± 0.85 | |
| Height-for-age z-score | 0.01 ± 0.88 | −0.15 ± 0.94 | |
| Iron status at study entry in infancy§ | |||
| Hemoglobin (g/L) | 101.3 ± 7.9 | 124.4 ± 6.8 | |
| Mean corpuscular volume (fL) | 67.0 ± 4.5 | 75.5 ± 2.3 | |
| Erythrocyte protoporphyrin(μg/dL RBC) | 181.9 ± 100.9 | 79.6 ± 21.3 | |
| Ferritin (μg/L) | 5.9 ± 5.8 | 17.2 ± 11.2 | |
| Family | |||
| Socioeconomic status index | 27.3 ± 6.7 | 27.6 ± 5.9 | |
| HOME score in infancy | 30.3 ± 4.5 | 30.4 ± 3.5 | |
| Father’s education (y) | 10.1 ± 2.4 | 10.2 ± 2.0 | |
| Mother’s education (y) | 10.0 ± 2.3 | 9.6 ± 3.2 | |
*
Values are means ± SD for continuous variables and percentages (n) for categorical variables. Statistical significance was determined by the t test or χ2.
§
There were no significant differences except for hematologic status in infancy. By design, iron status at study entry in infancy was different between groups, with statistical significance on all iron measures (p < 0.0001).