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Table 3 Summary of measures collected as part of the study

From: Efficacy of acupuncture for chronic knee pain: protocol for a randomised controlled trial using a Zelen design

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