Factors associated with physical activity following total knee arthroplasty for knee osteoarthritis: a longitudinal study

Table 3 Spearman correlation coefficients for associations between physical activity 6 months postoperatively and variables measured preoperatively

	Average daily step count 6 months postoperatively		Time spent in MVPA 6 months postoperatively
Variables	Correlation coefficient	p-value	Correlation coefficient	p-value
Knee-flexion ROM operated side preoperatively	0.238	0.020	0.214	0.037
Knee-flexion ROM contralateral side preoperatively	0.286	0.005	0.245	0.016
Knee-extension ROM operated side preoperatively	0.135	0.193	0.099	0.340
Knee-extension ROM contralateral side preoperatively	0.210	0.041	0.170	0.099
Knee-extension muscle strength operated side preoperatively	0.312	0.002	0.295	0.004
Knee-extension muscle strength contralateral side preoperatively	0.323	0.001	0.356	< 0.001
Knee pain, VAS operated side preoperatively	-0.036	0.728	-0.144	0.164
Knee pain, VAS contralateral side preoperatively	0.071	0.494	-0.090	0.384
TUG test time preoperatively	-0.344	0.001	-0.396	< 0.001
Average daily step count preoperatively	0.845	< 0.001	–	–
Time spent in MVPA preoperatively	–	–	0.763	< 0.001

ROM, range-of-motion; VAS, visual analog scale; TUG, timed up-and-go; MVPA, moderate-to-vigorous-intensity physical activity
Note: Statistically significant p values (p < 0.05) are shown in bold font

ISSN: 1471-2474