Table 4.
Goodness-of-Fit Results from TwinModels for Univariate Models of Mastery and Alcohol Dependence
| Model | Compared with model |
df | Δ χ 2 | p | AIC | |
|---|---|---|---|---|---|---|
| Mastery | ||||||
| 1 | General sex- limitation ACE |
— | 6642 | — | — | 7850.86 |
| 2 | Common sex- limitation ACE |
1 | 6643 | 0.17 | 0.68 | 7849.03 |
| 3 | No sex- limitation ACE |
2 | 6646 | 0.16 | 0.98 | 7843.19 |
| 4 | No sex- limitation AE |
3 | 6647 | 0.00 | 1.00 | 7841.19 |
| 5 | No sex- limitation E |
3 | 6648 | 122.25 | <0.001 | 7961.44 |
| Alcohol dependence | ||||||
| 1 | General sex- limitation ACE |
— | 6648 | — | — | −7103.44 |
| 2 | Common sex-limitation ACE |
1 | 6649 | 0.004 | 0.95 | −7105.44 |
| 3 | No sex- limitation ACE |
2 | 6652 | 1.05 | 0.79 | −7110.38 |
| 4 | No sex- limitation AE |
3 | 6653 | 0.00 | 1.00 | −7112.38 |
| 5 | No sex- limitation E |
3 | 6650 | 116.10 | <0.001 | −6998.28 |
Mastery was a 5-category ordinal variable. Model descriptors correspond to additive genetic (A), common environmental (C), and unique environmental (E) influences. Results for the best-fitting models are shown in bold.