Hip Osteoarthritis
Conditions
Brief summary
The aim of this study is to assess the effect of total hip arthroplasty on hip disability and pain compared to non-surgery in patients with hip osteoarthritis, using target trial emulation to emulate a randomized controlled trial.
Detailed description
The ideal research design to investigate effectiveness of total hip arthroplasty (THA) would be to randomize patients between surgery and (delayed) non-surgery. Such a randomized controlled trial (RCT) is deemed unethical due to the effect size of THA shown in observational studies. In this study a target trial is specified (a randomized controlled trial between THA and non-THA) and the target trial is emulated using observational data of 2 dutch hospitals participating in the value based health care (VBHC) programme for hip osteoarthritis. The objective of this study is to compare the effect of THA surgery on hip disability and pain between patients that did or did not receive THA surgery during the Covid-19 pandemic. It is hypothesized that THA is effective in restoring hip function and reduction of pain compared to the control group. The effect of THA has not been demonstrated by means of an RCT before. This study can contribute to the available evidence by assessing causal effectiveness of THA by means of RCT target trial emulation. As a secondary aim, the assumption of pseudo-random group allocation will be assessed. Logistic regression analysis will be used to test whether group allocation is independent of patient characteristics (age, sex, HOOS-PS baseline, NRS baseline, physical therapy before baseline and follow-up time.
Interventions
PROCEDURETotal hip arthroplasty
Unilateral primary total hip arthroplasty procedure.
Sponsors
JointResearch
Study design
Observational model
OTHER
Time perspective
OTHER
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
Inclusion criteria
* Patients on the waiting list for primary THA between 1-4-2020 up until 31-3-2022 in OLVG or Martini hospital. * Completed intake questionnaire (HOOS-PS baseline) * Indication osteoarthritis of the hip
Exclusion criteria
* Patients that received THA on both sides within follow-up (1-4-2020 and 1-1-2022) will be excluded. * Patients with other indications than osteoarthritis of the hip were excluded.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Hip disability and Osteoarthritis Outcome Score Physical function Short form (HOOS-PS), change score from baseline | 3 months | Ranging from 0 (no difficulty) to 100 (extreme difficulty) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Numerical Rating Scale (NRS) pain during weight bearing, change score from baseline | 3 months | Ranging from 0 (no pain) to 10 (worst pain) |
Countries
Netherlands
Outcome results
None listed