Knee extension range of motion and self-report physical function in total knee arthroplasty: mediating effects of knee extensor strength

Table 2 Postoperative recovery of SF-36 and knee measures ( n = 441)

Variables	Pre TKA	Post TKA	P-value^†
SF-36 variables
Physical function	38.8 (22.7)	66.6 (17.9)	<0.001
Bodily Pain	36.8 (18.3)	69.0 (23.5)	<0.001
Mental Health	75.9 (19.1)	82.7 (14.5)	<0.001
Knee variables
Extensor strength, %BW	18.0 (8.0)	25.6 (8.6)	<0.001
Extension ROM, deg	8.2 (8.2)	4.3 (4.9)	<0.001

Note: Values reported were mean (SD) unless stated otherwise.
Abbreviations: SF-36 = Medical Outcomes Study 36-Item Short-Form Health Survey; ROM, range of motion; BW, body weight; TKA, total knee arthroplasty.
^† P-values derived from repeated-measure ANOVA.

ISSN: 1471-2474