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Table 4 Tertiary outcome measures

From: Exercise programme with telephone follow-up for people with hand osteoarthritis – protocol for a randomised controlled trial

Tertiary outcome measures Measurement scale Time*
Hand pain in which hand Left/Right/Both 0, 3, 6
Which hand is most painful Left/Right 0, 3, 6
Hand injury, surgery or injections over past three months Single question 3, 6
Fatigue Numeric rating scale (NRS): 0-10 0, 3, 6
Mental distress (General Health Questionnaire, GHQ-20 [40]) Bi-modal fashion (0-0-1-1) 0 months
Self-reported work ability [41] 5-point scale 0, 3, 6
Physical activity (International Physical Activity Questionnaire-Short Form, IPAQ [42]) Mean minutes/week, MET-minutes/week 0, 3, 6
   • Vigorous-intensity activity   
   • Moderate-intensity activity   
   • Walking   
   • Sitting   
Exercise self-efficacy [43] 7-point scale 0, 3, 6
Exercise diary (intervention group only) dd.mm.yy 0-3
   • Date Minutes  
   • Exercise duration NRS: 0–10  
   • Pain level post-exercise Text  
   • Comments Kilogrammes  
   • Grip strength at group sessions (weeks 2, 3 and 8)   
Adverse events (intervention group only, obtained from the exercise diary + telephone follow-up log) Type, duration 0-3
Direct and indirect costs   
Self-reported sick leave over past three months Number of days 0, 3, 6
Absence from non-paid work over past three months Number of days 0, 3, 6
Self-reported health-care utilisation over past three months: number of visits to general practitioner, medical specialist, physiotherapist, manual therapist, chiropractor, occupational therapist, psychologist, social worker, nurse at general practice/outpatient clinic, “alternative therapy”, hospitalisation Number of visits 0, 3, 6
Pharmacology use for hand OA over past three months Self-reported 0, 3, 6
Medical or technical equipment purchased during the past three months Self-reported  
Costs for attending group sessions (only intervention group): distance travelled, transportation method, transportation costs, work absence, need for accompaniment Self-reported 0
Participant characteristic variables   
Age Birth year 0
Gender Female/Male 0
Marital status Married or cohabiting/Separated or divorced/Widowed/Single 0
Education Lower secondary school/Higher secondary school/University 1–4 years/University >4 years 0
Employment status Working full time/working part time/not working/student/working full-time in the home/unemployed or seeking work/age retired/disability pension/sick leave 0
Height Centimetres 0
Weight Kilogrammes 0
Dominant hand Left/Right 0
Year of OA diagnosis Year 0
Fulfilment of ACR criteria for hand OA Yes/no 0
  1. *0 = baseline, 3 = 3 months, 6 = 6 months.