Table 2. Results of generalized estimating equation analysis examining the effect of maltreatment, the 5-HTTLPR genotype, and frequency of contact with the child's primary support (WALD type 3 statistic).
| Source | df | χ2 test | Significance |
|---|---|---|---|
| Age | 1 | 5.35 | 0.02 |
| Sex | 1 | 2.7 | ns |
| Ancestral proportion score | 1 | 2.2 | ns |
| Genotype | 2 | 55.0 | 0.0001 |
| Maltreatment group | 1 | 4.9 | 0.03 |
| Social support: contact with primary support | 3 | 64.03 | 0.0001 |
| Genotype × maltreatment | 2 | 22.8 | 0.0001 |
| Genotype × social support | 2 | 32.9 | 0.0001 |
| Genotype × maltreatment × social support | 2 | 62.4 | 0.0001 |
ns, not significant.