Associations among pain catastrophizing, muscle strength, and physical performance after total knee and hip arthroplasty

Table 2 Pre- and postoperative data according to site of replacement

	THA			TKA
	Preoperative	Postoperative at 14-d	P-value	Preoperative	Postoperative at 14-d	P-value
TUG (s)	11.51 ± 3.82	13.67 ± 5.65	0.004a	12.22 ± 4.33	16.42 ± 9.09	0.004a
10 m gait speeds at comfortable (m/s)	0.97 ± 0.23	0.92 ± 0.20	0.187	0.99 ± 0.24	0.77 ± 0.23	0.000a
10 m gait speeds at maximum (m/s)	1.28 ± 0.34	1.11 ± 0.32	0.005a	1.19 ± 0.34	0.95 ± 0.32	0.000a
VAS	37.87 ± 24.20	17.61 ± 20.29	0.001a	41.91 ± 27.09	25.22 ± 20.41	0.004a
PCS	28.70 ± 9.28	18.70 ± 11.19	0.000a	28.26 ± 11.90	20.26 ± 10.72	0.003a
Muscle strength (kgf*m)
Hip abductor strength (operated side)	2.62 ± 1.63	2.04 ± 1.36	0.026a	3.49 ± 2.06	2.10 ± 1.63	0.001a
Knee extensor strength (operated side)	4.78 ± 3.19	3.99 ± 1.59	0.240	4.46 ± 2.82	2.55 ± 2.13	0.001a

These data were analyzed with paired t-tests. Data for TUG, 10-m gait speeds, VAS, PCS, and muscle strength are presented as mean ± SD.

^aP < 0.05. THA: Total hip arthroplasty; TKA: Total knee arthroplasty; TUG: Timed Up and Go; VAS: Visual analog scale; PCS: Pain Catastrophizing Scale.