Table 5. Results of the model comparison for pain catastrophizing, neuroticism, anxiety sensitivity, and fear of pain among the full ADE Cholesky model and the sub-models.

Model names	Differences of log likelihood	Differences of df	P vales of likelihood ratio tests	AIC
The fully saturated model	Reference	Reference	Reference	4565.75
The full ACE Cholesky model compared with the fully saturated model	66.92	58	0.15	4518.80
The full ADE Cholesky model compared with the fully saturated model	69.05	58	0.19	4516.67
The best model (the full ADE Cholesky model without all D factors and a path from A4 to PCS) compared with the full ADE Cholesky model	4.39	11	0.95	4499.06

Abbreviations: A = additive genetic factors; D = non-additive genetic factors; E = non-shared environmental factors; AIC = Akaike information criterion; df = degree of freedom; PCS = Pain Catastrophizing Scale.