Table 1

Data collection time points

Time pointData collection
BaselineDemographics, physical activity (UCLA Activity Scale),29 iHOT-33, SF-12,EQ-5D
Preoperative imaging, economics questionnaire
InterventionOperation notes and photographs; or PHT log. Complications records 6 weeks post start of intervention. Postoperative MRI (surgery intervention only)
6 monthsiHOT-33, SF-12, EQ-5D, resource usage, adverse events
12 months (primary outcome)iHOT-33, SF-12, EQ-5D, patient satisfaction, resource usage, adverse events
2 yearsFurther procedures questionnaire
3 yearsFurther procedures questionnaire
5 and 10 yearsLinkage to National Joint Registry and HES to identify need for hip replacement