Health-related quality of life and mobility of patients awaiting elective total hip arthroplasty: a prospective study.
Bibliographic record
Abstract
BACKGROUND: Waits for elective total hip arthroplasty for osteoarthritis are common in publicly funded health care systems, but they may lead to poorer postoperative outcomes and loss of health-related quality of life (HRQOL) through progressive pain and immobility during the wait. These issues have not been examined from the time of referral for surgery. Our primary objective was to test whether a longer wait was associated with poorer postoperative HRQOL. METHODS: Patients needing possible total hip arthroplasty for osteoarthritis were identified upon referral to a surgeon in London, Ont. Outcome measures, including the Western Ontario McMaster (WOMAC) Osteoarthritis Index and mobility in the 6-Minute Walk, were assessed at baseline and every 3-6 months thereafter until at least 3 months after the surgery. RESULTS: Of 553 potentially eligible patients referred for surgical assessment, 123 were placed on a waiting list for total hip arthroplasty; 114 underwent the procedure, and 99 of them returned for postoperative assessment. No significant differences in HRQOL or mobility were seen postoperatively between patients with short waits and those with long waits (a priori definitions < or = 6 months and > 6 months respectively). At referral, however, patients with short waits had poorer HRQOL and were less mobile than those with long waits (p = 0.002 for WOMAC Osteoarthritis Index total score, 0.001 for pain, 0.009 for stiffness and 0.008 for function; p = 0.006 for 6-Minute Walk results). Patients with short waits experienced larger gains in these measures from the time of referral until the postoperative assessment than did patients with long waits (p = 0.002 for WOMAC Osteoarthritis Index total score, < 0.001 for pain, 0.005 for stiffness and 0.005 for function; p = 0.06 for 6-Minute Walk results). For patients with long waits, increases in the WOMAC Osteoarthritis Index total score exceeded 10% and losses in walking distance exceeded 30 m from the time of referral to surgery. INTERPRETATION: The length of wait for elective total hip arthroplasty is not associated with postoperative HRQOL and mobility. However, patients who undergo the procedure within 6 months after referral have greater disability at referral, and realize greater gains in HRQOL and mobility after surgery, than patients waiting more than 6 months. Clinically important losses in HRQOL and mobility occur in patients waiting more than 6 months.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".