Table 4 Content of follow-up measures from self-completed questionnaire collected at 6-weeks, 6- and 12-months
Concept | Measurement method | Details |
|---|---|---|
Bodily pain | - self-completed manikin | "In the past 4 weeks have you had pain that has lasted for one day or longer in any part of your body?" |
Complaint specific functioning | Western Ontario and McMaster Universities OA index (WOMAC LK3.0) [61] | pain (0–20), stiffness (0–8), physical function (0–68) subscales |
Participant-nominated principal functional problem | Â | "Because of your knee, what one thing gives you the most problems?" 11 point NRS |
Knee pain intensity and unpleasantness | Â | 11 point NRS |
Bothersomeness of knee problem | Â | 5 point scale: not at all, slightly, moderately, very much, extremely |
Illness perceptions | Illness Perceptions Questionnaire Revised (IPQ(R)) [54] | 9 dimensions: illness coherence, treatment control, personal control, timeline (acute/chronic), timeline (cyclical), consequences, emotional representation, identify, causes |
Patient's self-efficacy | Arthritis Self-Efficacy Scale [62] | 11 items measuring patient's "certainty" |
Global outcome | [67] | 6 point scale: completely recovered, much improved, improved, same, worse, much worse |
Credibility of interventions | - confidence in received treatment - logic of received treatment Adapted from [58] | 5 point Likert scale |
Side effects | - self-reported side effects | nausea/vomiting, drowsiness/sleepiness, bruising, fainting, headaches, soreness to joints |
Health care utilisation for knee problem | - consultations | GP, district nurse, physiotherapist, hospital consultant, osteopath, chiropractor, homeopath, acupuncturist |
Medication for knee problem | - prescribed/OTC medication | medicine name, dose, number taken |
Experiences and preferences for treatment | - previous experience with exercise - preference for trial treatments - perceived helpfulness of trial treatments - outcome expectancy with trial treatments | yes, no 5 point Likert scale 4 point Likert scale 11 point NRS |
Quality of life | EuroQol EQ-5D [63] | Summary score and VAS score |
Occupational characteristics | - current employment status - satisfaction with employment situation - current/recent job title - socio-economic classification - work loss since last questionnaire due to knee problem | working full time, working part time, working in the home, unemployed/seeking employment, not working due to ill health/disability, student, retired very satisfied, satisfied, neither, unsatisfied, very unsatisfied SOC 2000 [63,64] |
Demographic characteristics | - date of birth, gender - marital status | single, married, widowed, divorced, cohabiting, single |