Table 3.

Summary of measures collected as part of the study

Primary outcome measures	Data collection instrument
Average overall pain in past week	11-point numerical rating scale (NRS)
Physical function in past 48 hours	Western Ontario McMaster Universities (WOMAC) Osteoarthritis Index 3.1 Likert version
Secondary outcome measures
Average pain on i) walking and ii) standing in past week	11-point NRS
Pain over past 48 hours	WOMAC Osteoarthritis Index 3.1 Likert version
Average restriction to daily activity in past week	11-point NRS
Participant global rating of change in i) pain ii) physical function and iii) overall.	5-point ordinal scales (12 weeks and 12 months)
Health-related quality of life	Assessment of Quality of Life Instrument (AQoL II)
	12-item Short Form Health Survey (SF-12)
Other measures
Psychosocial parameters	Arthritis Self-Efficacy Questionnaire
	Illness Perception Questionnaire Revised (IPQ-R)
	Medical Outcomes Study (MOS) Social Support Survey
	9-item Patient Health Questionnaire (PHQ-9)
	Revised Health Hardiness Inventory
Physical activity	Physical Activity Scale for the Elderly (PASE)
Use of health care/home assistance and work absences	Log book (retrospectively for prior 4 weeks)
Adverse events	Open-ended questioning (12 weeks)
Treatment session attendance	General practitioner treatment records (12 weeks)

All measures are recorded at baseline, 12 weeks and 12 months unless otherwise stated.