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Table 1 Summary of outcome measures and respective collection method

From: Rationale, design and protocol of a longitudinal study assessing the effect of total knee arthroplasty on habitual physical activity and sedentary behavior in adults with osteoarthritis

Outcome

Variables

Measurement method

Time points (months)

Primary

Habitual physical activity

Accelerometry (ActiGraph worn on the hip)

0, 1.5, 6

 

Sedentary behaviour

Accelerometry (activPAL worn on thigh)

0, 1.5, 6

Secondary

Knee OA-specific functional ability and quality of life

WOMAC

0, 1.5, 6

KOOS

KSS

OKS

 

Activity

UCLA activity index

0, 1.5, 6

 

Pain

VAS

0, 1.5, 6

 

Sleep quality

Sleep questionnaire

0, 1.5, 6