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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.