Table 4.

Hierarchical multiple regression results for demographic, clinical, and psychological presurgical predictors of acute postsurgical pain intensity 48 hours after THA (n=64) and TKA (n=60)

Variables	THA (n=64)					TKA (n=60)
	t	β	R2	ΔR2	ΔF	t	β	R2	ΔR2	ΔF
Block 1				0.140	4.981*				0.047	1.352
Sexa	3.057*	0.371				1.560	0.205
Ageb	0.125	0.015				0.537	0.071
Block 2				0.136	5.542*				0.026	0.736
Presurgical pain intensityc	2.344**	0.309				0.418	0.058
Other chronic pain statesd	1.972***	0.241				1.162	0.169
Final model			0.294					0.281
Block 1
Sexa	0.962	0.130				1.000	0.128
Ageb	−0.338	−0.040				1.635	0.210
Block 2
Presurgical pain intensityc	1.746***	0.254				0.479	0.062
Other chronic pain statesd	1.654	0.104				0.315	0.042
Block 3				0.018	0.709				0.208	7.379*
Optimisme	−0.760	−0.092				−2.518*	−0.339
Emotional representatione	0.727	0.097				1.895***	0.254

Notes:

^*p≤0.01,

^**p≤0.05,

^***p≤0.10.

^aDichotomous variable: 0 = men; 1 = women;

^bcontinuous variable in years;

^ccontinuous variable, NRS 0–10 from BPI-SF;

^ddichotomous variable: 0 = no; 1 = yes;

^econtinuous variable.

Abbreviations: BPI–SF, Brief Pain Inventory–Short Form; NRS, Numerical Rating Scale; THA, total hip arthroplasty; TKA, total knee arthroplasty.