Table 1 Content of 18-month follow-up questionnaire

Perceived change in knee pain since baseline

Transition index^‡ [40]

Completely recovered / Much better / Better / No change / Worse / Much worse

Knee injury since baseline

Single item (adapted from [41])

Yes/No

GP consultation for knee pain since baseline

Single item (adapted from [41])

Yes/No

Health care utilisation for knee pain

Since baseline... Single item on services (adapted from [41])

In last month... Single item on oral analgesia^§ (adapted from [41])

Single item on non-pharmacological and other^§

Yes/No to physiotherapy, hospital specialist, acupuncture, osteopath/chiropractor, drugs on prescription, knee operation, knee injection, other

Yes/No to ibuprofen, paracetamol, aspirin, coproxamol, cocodamol, dihydrocodeine, diclofenac, naproxen, tramadol, COX-II, other

Yes/No to dieting to lose weight, specific knee exercises, topical, glucosamine/chondroitin sulphate, other

Coping strategies

Single-item CSQ [42]

7 items rating diverting attention, reinterpreting pain sensation, coping self-statements, ignoring sensations, praying/hoping, catastrophising, increase behavioural activities on 7-point scale

Knee pain/disability

Pain days in last 6 months^§

Chronic Pain Grade^§ [32]

Bothersomeness of knee pain [43]

WOMAC (LK3.0)^§ [44]

Symptom satisfaction^§ (adapted from [31])

No days, 1–30, 31–89, 90+ days

7-item scale giving categorical grade I-IV

5-point Likert scale

Pain (0–20)^‡, Stiffness (0–8), Physical functioning (0–68) subscales

5-point Likert scale

Bodily pain

Self-completed manikin^§

Pain lasting a day or more in last 4 weeks. Scored as 44 mutually exclusive areas + LBP, neck pain, and hip pain [45]

Hand

Hand pain in last 12 months^§

Bothersomeness of hand pain [43]

Hand problems in last 12 months^§

Bothersomeness of hand problems [43]

Side of hand pain^§

Duration in last 12 months^§ (adapted from [41])

Yes/No within last 12 months

5-point Likert scale

Yes/No within last 12 months

5-point Likert scale

Right, left, both

<7 days/1–4 weeks/>1 month – <3 months/3+ months

Hand physical features

Single item on nodes [46]

Hand drawing [46]^§

Yes/No for nodes and knobbly swelling

Perceived general health

MOS SF-12^{§ ‡} [47]

Physical and mental component scores

Mobility

Mobility limitation Preclinical mobility adjustment [48]

Yes/No

Yes/No

Anxiety and depression

HAD^§ [49]

Anxiety and depression subscales

Demographic characteristics

Date of birth, gender Current employment status^{§ ‡}

Employed, not working due to ill health, seeking employment, retired, housewife, other

Narrative account

Single item

Open-ended question asking for an account of the course of knee pain