Table 1

Results of fitting genotype × environment (G × E) interaction models to depression and anxiety

Model -2LL d.f. χ 2 difference P
-2LL, -2(log likelihood).
I Full G × E interaction model 4440.029 2059
II Drop G × E interaction for depression 4456.278 2061 16.25 0.000
III Drop G × E interaction for anxiety 4450.158 2061 10.13 0.006
IV Drop G × E interaction for covariance between depression and anxiety 4444.476 2060 4.45 0.035