TABLE 2.

Multiple regression analysis for predictors of mean pain intensity (n=67)

Variable	Beta	P	Total R2	R2Δ	FΔ
Step 1
Model 1: Components of Turk model
Summary			0.270	0.270	4.502
FPQ-III	0.454	0.001
ASI	0.069	0.593
PASS-AVO	−0.009	0.946
PCS	0.049	0.706
Sex	0.294	0.015
Step 2: After controlling for components of Turk model
Model 2A: Alexithymia
Final model			0.352	0.083	7.642
FPQ-III	0.453	0.001
ASI	0.012	0.922
PASS-AVO	−0.002	0.987
PCS	−0.025	0.841
Sex	0.263	0.023
TAS-20	0.307	0.008
Model 2b-1: TAS-F1 – Difficulty identifying feelings
Final model			0.319	0.049	4.333
FPQ-III	0.472	0.001
ASI	−0.010	0.940
PASS-AVO	0.022	0.867
PCS	−0.060	0.663
Sex	0.292	0.014
TAS-F1	0.259	0.042
Model 2b-2: TAS-F2 – Difficulty describing feelings
Final model			0.370	0.100	9.541
FPQ-III	0.475	0.000
ASI	0.019	0.876
PASS-AVO	0.030	0.818
PCS	−0.002	0.987
Sex	0.315	0.006
TAS-F2	0.324	0.003
Model 2b-3: TAS-F3 – Externally oriented thinking
Final model			0.289	0.019	1.612
FPQ-III	0.433	0.002
ASI	0.076	0.554
PASS-AVO	−0.039	0.780
PCS	0.055	0.668
Sex	0.250	0.045
TAS-F3	0.148	0.209

Sex coded as 0 (female) and 1 (male). ASI Anxiety Sensitivity Index; FPQ-III Fear of Pain Questionnaire III; PASS-AVO Avoidance subscale of the Pain Anxiety Symptom Scale-20; PCS Pain Catastrophizing Scale; TAS-20 Toronto Alexithymia Scale-20; TAS-F1 Total score on the difficulty identifying feelings subscale of the TAS-20; TAS-F2 Total score on the difficulty describing feelings subscale of the TAS-20; TAS-F3 Total score on the externally oriented thinking subscale of the TAS-20