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Table 2 Questionnaire items

From: Prospective observational cohort study of Health Related Quality of Life (HRQOL), chronic foot problems and their determinants in gout: a research protocol

Conceptual domain Operational definition Empirical measure Number of items Time point
Section A: About Gout
Gout frequency No. of attacks in the last 12 months/since last contact Numerical rating scale 0- ≥ 5 1 All
Age at diagnosis Age in years Numerical free text box 1 BL
Acute attack of gout Acute episode at time of questionnaire Yes/No 1 All
Allopurinol Reported use of allopurinol Yes/No 1 All
Current daily dose of allopurinol Nine daily dose options: 50 mg-900 mg 1 All
Section B: How gout affects your life
Gout concern, wellbeing, productivity, convenience and satisfaction Gout Impact Scale[11] 5-item Likert scale 18 All
Illness perception Modified Illness perception questionnaire[12] 5-item Likert scale 4 BL, 12 months, 36 months
Section C: General Health
Physical function SF36 Physical function sub-scale (PF10)[13] 3-item Likert scale 10 All
Health Assessment Questionnaire Disability Index[14] 4-item Likert scale 17 All
Co-morbidities Diabetes mellitus, Renal failure, renal calculi, Cerebrovascular accident, Transient ischaemic attacks, ischaemic heart disease, hyperlipidaemia Yes/No 9 BL
Section D: How you feel
Depression Patient health questionnaire (PHQ 9)[15] 4 point Likert scale 16 BL, 12 months, 36 months
Anxiety Generalised anxiety disorder questionnaire (GAD)[16]
Section E: Foot and other joint problems
Hallux valgus Self-completed line drawings[17] 5 line-drawings for each foot depicting increasing severity of hallux valgus 2 BL, 12 months, 36 months
Pain Pain in the hands, hips, knees and feet in the last year Yes/No 4 BL, 12 months, 36 months
Location of body pain in last 4 weeks Self-completed body manikin[18, 19] 1 BL, 12 months, 36 months
Foot pain Foot pain, aching, stiffness in last month[20] Frequency on 5-point Likert scale 1 BL, 12 months, 36 months
Foot pain location Location of foot pain in last four weeks Self-completed foot manikin[21] 1 BL, 12 months, 36 months
Foot function Manchester Foot Pain and Disability Index[22] Frequency on 3-point likert scale 17 BL, 12 months, 36 months
Consultation for foot problems Consultation with GP, physiotherapy, podiatry, in last 12 months/since last contact Yes/No 4 BL, 12 months, 36 months
Section F: Work
Occupational characteristics Current employment status 11-response options 1 BL, 12 months, 36 months
Work absence during last 6 months due to joint/back problems Yes/No 1 BL, 12 months, 36 months
Ability to do usual job 5-response options 1 BL, 12 months, 36 months
Section G: Demographic/socioeconomic characteristics
Date of birth Date of birth Date of birth 1 BL
Gender Gender Male/Female 1 BL
Anthropometric characteristics Height Meters or feet/inches 1 All
Weight Kilogram or stones/pounds 1 All
Marital status Marital status 6-response options 1 BL
Living alone Living alone Yes/No 1 BL
Adequacy of income Adequacy of income 4-response options 1 BL
Education Higher education Yes/No 1 BL
Ethnicity Ethnicity 6-response options 1 BL
Life-style-characteristics Frequency of alcohol consumption 6-response options 1 BL
Weekly amount of beer/spirits/wine consumed Free-text 1 BL
Smoking status 3-response options 1 BL