Table 1.
Child and family characteristics by DRD2 genotype.
| Variable | Taq A1/A1 (n = 74) | Taq A1/A2 + A2/A2 (n = 651) |
|---|---|---|
| Child characteristics (mean ± SD) | ||
| IQ | 106.62 ± 17.34 | 107.32 ± 16.91 |
| Blood lead (μg/dL) | 11.66 ± 5.11 | 11.42 ± 5.43 |
| Hemoglobin (g/dL) | 11.95 ± 1.14 | 11.91 ± 1.19 |
| Midarm circumference (cm) | 16 ± 1.61 | 16.05 ± 1.48 |
| Age (years) | 5.05 ± 0.95 | 4.95 ± 0.93 |
| Family characteristics [n (%)] | ||
| Average monthly income (Indian rupees) | ||
| < 2,000 | 12 (16.22) | 97 (14.9) |
| 2,000–4,000 | 30 (40.54) | 291 (44.7) |
| 4,000–6,500 | 19 (25.68) | 157 (24.12) |
| > 6,500 | 13 (17.57) | 106 (16.28) |
| Mother’s education level | ||
| Illiterate/primary school | 15 (20.27) | 118 (18.13) |
| Middle school completion | 23 (31.08) | 224 (34.41) |
| High school certificate | 22 (29.73) | 152 (23.35) |
| College | 14 (18.92) | 157 (24.12) |
| Father’s education level | ||
| Illiterate/primary school | 11 (14.86) | 76 (11.67) |
| Middle school completion | 16 (21.62) | 187 (28.73) |
| High school certificate | 22 (29.73) | 184 (28.26) |
| College | 25 (33.78) | 204 (31.34) |
| No. of other children | ||
| 0 | 12 (16.22) | 148 (22.89) |
| 1 | 47 (63.51) | 419 (64.36) |
| ≥ 2 | 15 (20.27) | 84 (12.90) |