Table 3. Results of the model comparison for the three subdomains of pain catastrophizing (helplessness, magnification, rumination).

Model names	Differences of log likelihood	Differences of df	P vales of likelihood ratio tests	AIC
The fully saturated model	Reference	Reference	Reference	1481.51
The full ACE Cholesky model compared with the full saturated model	40.64	36	0.27	1450.16
The full ADE Cholesky model compared with the full saturated model	40.47	36	0.27	1449.99
The best model (The full ADE Cholesky model without all D factors and a path from A2 to magnification. Please see Fig 1) compared with the full ADE Choesky model.	2.00	7	0.95	1437.99

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