Table 5.
Fit statistics from models of variance components allowing for gene-environment interaction and correlation.
| Fit Statistics | Model Comparisons | |||||||
|---|---|---|---|---|---|---|---|---|
| Moderator | Model | -2LL | df | AIC | BICadj | LRT | df | p |
| Achievement | ||||||||
| Girls | Full G × E | 6045.9 | 2318 | 1409.9 | -768.0 | -- | -- | -- |
| No G × E | 6079.2 | 2324 | 1431.2 | -761.1 | 33.4 | 6 | < .001 | |
| Moderation of unique | 6052.2 | 2322 | 1408.2 | -771.6 | 6.3 | 4 | ns | |
| A and E variance | ||||||||
| Boys | Full G × E | 5600.7 | 2037 | 1526.7 | -347.9 | -- | -- | -- |
| No G × E | 5627.8 | 2043 | 1541.8 | -343.6 | 27.1 | 6 | < .001 | |
| Moderation of unique | 5602.8 | 2041 | 1520.8 | -353.0 | 2.1 | 4 | ns | |
| C and E variance | ||||||||
| Control | ||||||||
| Girls | Full G × E | 6070.0 | 2312 | 1446.0 | -742.4 | -- | -- | -- |
| No G × E | 6102.9 | 2318 | 1466.9 | -735.8 | 32.9 | 6 | < .001 | |
| Moderation of unique | 6072.1 | 2316 | 1440.1 | -747.9 | 2.10 | 4 | ns | |
| A and E variance | ||||||||
| Boys | Full G × E | 5534.2 | 2041 | 1452.2 | -389.3 | -- | -- | -- |
| No G × E | 5541.6 | 2047 | 1447.6 | -394.8 | 7.4 | 6 | ns | |
| Aggression | ||||||||
| Girls | Full G × E | 6127.4 | 2322 | 1483.4 | -735.6 | -- | -- | -- |
| No G × E | 6140.9 | 2328 | 1484.9 | -738.6 | 13.5 | 6 | < .05 | |
| Boys | Full G × E | 5749.9 | 2037 | 1675.9 | -273.3 | -- | -- | -- |
| No G × E | 5756.5 | 2043 | 1670.5 | -279.2 | 6.6 | 6 | ns | |
Note. –2LL = -2*loglikelihood; df = degrees of freedom; AIC = Akaike Information Criterion; BICadj = sample-size adjusted Bayesian Information Criterion; LRT = likelihood ratio test; G × E = gene-environment interplay model with gene-environment interactions and correlations; A = additive genetic variance; C = shared environmental variance; E = nonshared environmental variance; ns = nonsignificant at p < .05.