Domain | Instrument | Timepoint |
---|---|---|
Descriptive measures | Â | Baseline |
 Age, sex, height |  | Baseline |
 Duration of hip symptoms |  | Baseline |
 Geographical location |  | Baseline |
 Education level |  | Baseline |
 Current employment status |  | Baseline |
 Problem in other joints |  | Baseline |
 Radiographic disease severity | Kellgren and Lawrence grading scale | Baseline |
 Comorbidities | Self-Administered comorbidity questionnaire | Baseline |
 Treatment expectation | 5-point ordinal scale | At group allocation |
Primary outcome | ||
 Overall average hip pain in past week | 11-point NRS | Baseline, 6 and 12 months |
Secondary outcomes | ||
 Weight | Self-reported | Baseline, 6 and 12 months |
 Body mass index |  | Baseline, 6 and 12 months |
 Visceral fat mass | Dual energy x-ray absorptiometry | Baseline and 6 months |
 Total body fat mass | Dual energy x-ray absorptiometry | Baseline and 6 months |
 Hip pain | 11-point NRS | 6 and 12 months |
 Hip pain, difficulty with activities of daily life, hip-related quality of life | HOOS | Baseline, 6 and 12 months |
 Health-related quality of life | AQoL-8D | Baseline, 6 and 12 months |
 Perceived change in physical activity since baseline | 7-point ordinal scale | 6 and 12 months |
 Perceived change in hip problem since baseline | 7-point ordinal scale | 6 and 12 months |
Other measures | ||
 Total body lean mass | Dual energy x-ray absorptiometry | Baseline and 6 months |
 Depression, anxiety and stress | Depression, Anxiety and Stress Scale | Baseline, 6 and 12 months |
 Pain-related fear of movement | Brief Fear of Movement Scale | Baseline, 6 and 12 months |
 Self-reported medication use |  | Baseline, 6 and 12 months |
 Self-reported use of co-interventions |  | 6 and 12 months |
 Self-control for eating | Weight Efficacy Lifestyle Questionnaire | Baseline, 6 and 12 months |
Adherence | ||
 Self-rated adherence to physical activity plan | 5-point Likert scale | Baseline to 6 months |
 Self-rated adherence to weight management | 5-point Likert scale | Baseline to 6 months |
 Self-rated number of strengthening exercise sessions completed over past 2 weeks |  | 6 months |
 Number and duration of consultations with physiotherapist |  | Baseline to 6 months |
 Number and duration of consultations with dietitian (diet and exercise group only) |  | Baseline to 6 months |
 Number of weeks using meal replacements (diet and exercise group only) |  | Baseline to 6 months |
Harms | ||
 Adverse events |  | 6 and 12 months |