The ARC Study is a national observational cohort study to investigate patient reported and clinical outcomes after hip and knee replacements. The study has the following objectives: 1. To evaluate outcomes following hip and knee replacements. 2. To determine risk factors for adverse outcomes in primary hip and knee replacements. 3. To identify targets for future research and intervention in patients undergoing primary hip and knee replacements 4. To provide a resource from which to identify potential participants for future clinical trials, and to use data collected in the ARC Study as comparison or control data for trial participants who have been randomised to receive one or more interventions. Participants are recruited and consented online. Patients are invited to participate by collaborating surgical teams nationally in outpatient clinics at the time of being added to a waiting list, in addition to an advertising campaign to recruit patients. They are directed to an online portal where they will be able to review further information. Consent and data collection is completed electronically through patients entering data online. Baseline demographics and characteristics are recorded, including details of socio-demographics, lifestyle, health status and patient reported outcome measures (PROMs). Patients then undergo hip/knee replacement and postoperative rehabilitation according to the standard care and protocols of the hospital and the preferences of their treating surgeon. Follow-up data, including PROMs, is collected via online questionnaires up to two years following surgery. The study will ultimately also enable multiple trials to be embedded within the cohort study, using a 'Trials within Cohorts' (TwiCs) methodology.
Study Type
OBSERVATIONAL
Enrollment
5,000
Hip/Knee Replacement
Northumbria Healthcare NHS Foundation Trust
Ashington, United Kingdom
RECRUITINGEQ-5D-5L health-related quality of life score
Time frame: 2 years
PROMIS-10
Patient-Reported Outcomes Measurement Information System Global Health
Time frame: 2 years
Oxford Hip Score
Time frame: 2 years
Oxford Knee Score
Time frame: 2 years
Musculoskeletal Health Questionnaire
MSK-HQ
Time frame: 2 years
Hospital for Special Surgery Hip/Knee Replacement Expectations Surveys
Perception of success/fulfilment of expectations
Time frame: 2 years
Patient Health Questionnaire-4
PHQ-4
Time frame: 2 years
11-point Numerical Pain Rating Scale
Pain
Time frame: 2 years
Pain Catastrophising Scale
Time frame: 2 years
Length of stay
Self-reported by study specific electronic questionnaire
Time frame: 2 years
Activity
Levels of exercise and activity self-reported by study specific electronic questionnaire
Time frame: 2 years
Return to work
Work status self-reported by electronic questionnaire using National Statistics Socio-economic Classification
Time frame: 2 years
Readmission within 30 days
Time frame: 30 days
Surgical Site Infection
Time frame: 2 years
Periprosthetic Fracture
Time frame: 2 years
Dislocation
Time frame: 2 years
Revision/Re-operation
Time frame: 2 years
Mortality
Time frame: 2 years
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