Table 1.

Reliability of KOOS-PS and EQ-5D-5L Scores at Five Time Points from Before Surgery to 6 Months After Surgery

Variable	Before Surgery	7 Days After TKA	1 Month After TKA	3 Months After TKA	6 Months After TKA
KOOS-PS score
Cronbach’s alpha	0.85	0.83	0.81	0.81	0.80
EQ-5D-5L score
Cronbach’s alpha	0.77	0.78	0.72	0.79	0.79

Abbreviations: EQ-5D-5L, European Quality of Life Five Dimension Five Level; KOOS-PS, Knee Injury and Osteoarthritis Outcome Score; TKA, total knee arthroplasty.