Five-Year Revision Surgery Rates After Total Ankle Arthroplasty and Ankle Arthrodesis in Patients With Prior Bariatric Surgery: A Retrospective Cohort Study
Bibliographic record
Abstract
INTRODUCTION: It is unclear how bariatric surgery for the treatment of obesity may affect outcomes of surgical treatment for ankle conditions. The purpose of this study was to compare rates of revision surgery after primary ankle arthrodesis ("arthrodesis") and total ankle arthroplasty ("arthroplasty") for patients who had undergone bariatric surgery and those who had not ("control group"). METHODS: In this retrospective study, we used data from the PearlDiver database to compare 5-year revision surgery rates after arthroplasty and arthrodesis in patients with and without a history of bariatric surgery. Cohorts were propensity-matched by age, sex, and Charlson Comorbidity Index value in a 1:4 ratio. We explored the following surgical outcomes: arthroplasty revision, joint infection, instrumentation removal, open reduction and internal fixation (ORIF), and adjacent joint fusion. Cumulative incidence was calculated through Kaplan-Meier survival analysis and compared using Cox proportional hazard ratios. RESULTS: At 5 years after arthrodesis, the likelihood of adjacent joint fusion was higher among patients with a history of bariatric surgery than among control patients (hazard ratio: 1.8, 95% confidence interval, 1.2 to 2.6); however, we found no differences in surgical outcomes for joint infection, instrumentation removal, or ORIF. At 5 years after arthroplasty, surgical outcomes did not differ between those with a history of bariatric surgery versus control patients. DISCUSSION: These findings suggest that a history of bariatric surgery is not an important predictor of joint infection, instrumentation removal, or ORIF within 5 years after primary total ankle arthroplasty or arthrodesis. When choosing between arthroplasty or arthrodesis in patients who have undergone bariatric surgery, higher incidence of adjacent joint fusion should be a consideration. LEVEL OF EVIDENCE: III, Retrospective cohort study.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.004 |
| Meta-epidemiology (narrow) | 0.000 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".