Table 2 Outcome measures

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 pain^α

0–20

0,3,6,9,18,36

Stiffness^α

0-8

Function^α

0 - 68

(WOMAC[48])

Illness perceptions^α

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 facilities^α

Use of local facilities for physical activity in the last 7 days

0,3,6,9,18,36

Self-efficacy for exercise^α

0-10 (SSE scale[55])

0,3,6

Outcome expectations for exercise^α

1-5 (OEE-2[56])

0,3,6

Physical activity^α

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

Accelerometry^α

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

Depression^α

0-24 (PHQ8[58])

0,3,6,18,36

Anxiety^α

0-21 (GAD7[57])

0,3,6,18,36

Quality of life^α

-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