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Table 2 Study questionnaires

From: Acute flares of knee osteoarthritis in primary care: a feasibility and pilot case-crossover study

Concept Measurement method Detail Time available for completion Reminder sent
Baseline questionnaire
 Section A: knee pain Duration Pain in last 12 months. Left, right 7 days Yes
Time since onset < 1 year, 1–4 years, 5–9 years, 10+ years. Left, right   
Pattern [36] 5 flare pattern illustrations. Left, right   
Experience of knee pain [37] In past 6 months: no pain, predictable pain, some unpredictability, constant. Left, right   
Walking difficulty [38] Injury induced walking problems for at least 1 week. Left, right   
Pain, aching, stiffness in last month [39, 40] No days, few days, some days, all days. Left, right   
Worst/least in last week, average, current [41] 0–10 NRS with anchors (no pain, pain as bad as you can imagine)   
Flare-up at present Yes/no. Left, right   
Self-reported main flare trigger Free text   
Bothersomeness in last 24 h [42] Not at all, slightly, moderately, very much, extremely. Left, right   
Leg angles [43] Very bow legged, bowed legged, normal, knock-knee, very knock-knee. Left, right   
Foot angles [43] Very turned out feet, turned out feet, straight, turned in feet, very turned in feet. Left, right   
KOOS-PS [44] 7-item and 5-option categories for difficulties with daily activities in last week   
KOOS-Qol [45] 4-item and 5-option categories for quality of life in last week   
Medications for knee pain, last week
Health professional consultation for knee pain, last year
17-option categories for drug use
General practitioner, practice/district nurse, physiotherapist, surgeon, rheumatologist, acupuncturist, occupational therapist.
  
 Section B: general health Perceived general health [46]
Physical activity(GPPAQ) [47]
Excellent, very good, good, fair, poor
Work physical activity (5-response options), general physical activity in last week (5-response options, 4-option categories), walking pace
  
Self-reported weight Stones/lbs. or kg   
Self-reported height Feet/inches or cm   
 Section C:
demographics
Gender
Date of birth
Current employment
Male/female
Date/month/year
Paid employment or self-employed, retired, looking after home and/or family, unable to work because of sickness or disability, unemployed, doing unpaid or voluntary work, full or part-time student
  
Scheduled (control-period) and event-driven (case-period) questionnaires*
 Knee pain Flare-up at present Yes/no. Left, right 7 days/ 2 days Yes
Average pain in last 24 h [27] 0–10 NRS with anchors (no pain, pain as bad as you can imagine). Left, right   
 Changes noticed since flare-up† Limping, swelling, stiffness, increased difficulty with activities of daily living, sleep disturbed by knee pain Tick as many boxes as apply   
 Physical activities Vigorous physical activity > 10 mins [48] Yes/no   
Climbing several flights of stairs Yes/no   
Repetitive or prolonged squatting Yes/no   
Repetitive or prolonged kneeling Yes/no   
Climbing up and down ladders Yes/no   
Lifting or moving heavy objects Yes/no   
Prolonged periods of sitting without a break Yes/no   
Prolonged periods of standing without a break Yes/no   
Any unusual activities involving knees Yes/no   
 Slips, trips, sprains, strains Slip, trip, or fall
Episode of buckling or giving way [49]
Yes/no
Yes/no. Left, right
  
 Health and healthcare Reduce or miss medication
Take extra medication
Yes/no
Yes/no
  
Cough, cold, other minor infection Yes/no   
 Stress and other things Work related stress [50]
Home related stress [50]
Yes/no
Yes/no
  
Friend/family-related stress [50] Yes/no   
Low mood/depression Yes/no   
Feeling angry, irritable, hostile Yes/no   
Poor night’s sleep Yes/no   
Eat foods usually avoided Yes/no   
Cold/damp weather Not at all, slightly, moderately, severely, extremely   
 Day of above exposure All yes responses from above sections (physical activity; slips, trips, sprains, strains; health and healthcare; stress and other things) anchored to day of the week Grid of previous 7 days from declared flare-up onset. Tick as many boxes as apply   
Brief daily questionnaire during flare-up
 Knee pain Average pain in last 24 h [27] 0–10 NRS with anchors (no pain, pain as bad as you can imagine). Left, right 6 h No
 Impact of pain Bothersomeness in last 24 h [42] Not at all, slightly, moderately, very much, extremely. Left, right   
 Medication use Pain medication taken in last 24 h No; yes, but less than usual; yes, but about the same as usual; yes, more than usual   
 Flare-up resolution Has your flare-up ended Yes/no   
Brief daily questionnaire for sub-study
 Main flare-up trigger Did your main trigger for a flare-up of knee pain [baseline response reminder] happen today Yes/no 6 h No
 Knee pain Average pain in last 24 h [27] 0–10 NRS with anchors (no pain, pain as bad as you can imagine). Left, right   
  1. KOOS-PS Knee injury and Osteoarthritis Outcome Score-Physical Function Short Form, Qol qualify of life, GPPAQ General Practice Physical Activity Questionnaire, NRS numerical rating scale
  2. *Control-period questionnaires scheduled for week 1, 5, and 9 post-baseline completion; event-driven questionnaires initiated by participant if and when flare-ups occur
  3. Question applied to event-driven questionnaires only