Table 1.

Summary of outcome measures and respective collection method

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