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Table 2 Outcome measures

From: A multicentre, pragmatic, parallel group, randomised controlled trial to compare the clinical and cost-effectiveness of three physiotherapy-led exercise interventions for knee osteoarthritis in older adults: the BEEP trial protocol (ISRCTN: 93634563)

Data collection Measurement scale Time points (months)
Participant characteristics   
Age Years 0,3,6,9,18,36
Gender Female/Male 0,3,6,9,18,36
Weight Stones and lbs or Kilograms 0,3,6,9,18,36
Height Feet and inches or centimeters 0
Marital status Married/separated/divorced/widowed/cohabiting/single 0
Work factors   
Current/most recent job title Free Text 0,6,18,36
Currently in a paid Job Yes/No 0,6,18,36
Working hours Working full time (30 hours or more per week)/working part time (29 hours or less per week)/ 6,18,36
Time off because of knee pain including time off to visit any health care professional Yes/No (during last 6 months) 6,18,36
How many days weeks, weeks or months were you absent from work due to knee problem Number of days/weeks/months (during last 6 months) 6,18,36
Knee Problem   
Knee with most discomfort Tick boxes for left or right 0,3,6,9,18,36
Duration of knee problem In the last 12 months/More than 1 year but less than 5 years ago/More than 5 years but less than 10 years ago/I have had this knee problem for more than 10 years 0
Global assessment of change in knee problem Completely recovered/much better/better/no change/worse/much worse (since first seen by the physiotherapist) 3,6,9,18,36
Knee painα 0–20 0,3,6,9,18,36
Stiffnessα 0-8
Functionα 0 - 68
Illness perceptionsα   0,3,6,
  - Consequences 0-10
  - Timeline 0-10
  - Personal control 0-10
  - Treatment control 0-10
  - Identity 0-10
  - Concern 0-10
  - Understanding 0-10
  - Emotional response 0-10
  (IPQ-brief modified for knee pain[54])
Physical Activity & Exercise   
Experience of exercise Personal experiences of exercise 0
Use of local facilitiesα Use of local facilities for physical activity in the last 7 days 0,3,6,9,18,36
Self-efficacy for exerciseα 0-10 (SSE scale[55]) 0,3,6
Outcome expectations for exerciseα 1-5 (OEE-2[56]) 0,3,6
Physical activityα 0-400+ (PASE[51]) 0,3,6,9,18,36
Exercise adherence and treatment credibility Confidence in and adherence to treatment plan 3,6,9,18,36
Accelerometryα Average counts per minute For a sub-sample of participants 0,3,6,9,18,36
Meeting physical activity guidelines[60]
General health and well being   
Depressionα 0-24 (PHQ8[58]) 0,3,6,18,36
Anxietyα 0-21 (GAD7[57]) 0,3,6,18,36
Quality of lifeα -0.59-1 (EQ-5D-3 L[59]) 0,3,6,9,18,36
Body manikin (pain) Body area shaded to represent pain last a day or longer in the last 4 weeks 0
Co-morbidity Tick boxes for key co-morbidities 0
Managing your knee problem   
Current medication for knee problem Prescribed and over the counter medications (with dosage and length of supply) 0,3
Prescribed medication for knee problem Prescribed medications in the last 6 months/12 months/18 months (with dosage and length of supply) 6,18,36
Cost of over the counter treatments/appliances e.g. painkillers, anti-inflammatory drugs, TENS machine, hot and cold packs, knee supports (£ in the last 6 months/12 months/18 months) 6,18,36
Costs for use of local facilities/opportunities involving physical activity (£ in the last 6 months/12 months/18 months) 6,18,36
Healthcare Utilisation Contact with NHS and private healthcare professionals, number of visits/inpatient stays, types of investigations/treatments in the last 6 months/12 months/18 months 6,18,36
  1. Key: EQ-5D-3 L = Quality of Life; GAD 7 = Generalized Anxiety Disorder 7; IPQ – Brief = The Brief Illness Perception Questionnaire; OEE-2 = Outcome Expectations for Exercise Scale - 2; PASE = Physical Activity Scale for the Elderly; PHQ8 = Patient Health Questionnaire 8; SEE = Self-Efficacy for Exercise Scale; WOMAC = Western Ontario and McMaster Universities Arthritis Index. α = Measure used as an outcome to test for clinical effectiveness (along with Body mass index (BMI) and the OMERACT-OARSI responder criteria[16, 17], which are not indicated on this table as derived by combining individual measures of height and weight for BMI and WOMAC pain and function with global assessment of change for the OMERACT-OARSI responder criteria).