Total Hip and Knee Replacement Surgeries in Alberta Utilization and Associated Outcomes
Bibliographic record
Abstract
OBJECTIVE: Between 1994/95 and 1996/7, the healthcare system in Alberta underwent a radical transformation that saw the regionalization of service delivery and a reduction in overall healthcare funding. The aim of this study is to examine trends in utilization and associated post-operative complications and readmissions for two procedures, total hip arthroplasty (THA) and total knee arthroplasty (TKA) during this period of restructuring. METHODS: This is a six-year retrospective analysis using hospital separation and healthcare insurance plan registry databases. During the study period, we looked at trends in inpatient procedure volumes, average lengths of stay, post-operative complications during the index hospital stay and readmissions within one year. RESULTS: Over a six-year period, the age-sex standardized provincial rate of THAs increased by 18% while the rate of TKAs increased by 73%. Average lengths of stay decreased for both procedures by over 50%. The rate of procedures with at least one post-operative complication within the index episode of care decreased over the study period by 19% for THA and 21% for TKA. Readmissions due to complications of surgery increased overall by 32% for THA and 2% for TKA. Regional and sex differences were observed throughout the period. CONCLUSIONS: While the overall rate of hospitalizations has decreased in Alberta, the rates of THA and TKA procedures have increased. The lengths of stay following these procedures have, at the same time, reduced dramatically. Adverse outcomes as measured by complication rates associated with these procedures have decreased, though readmissions due to complications after surgery have increased.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 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".