Preoperative osteoarthritis severity influences quality of life trajectories following hip arthroscopy in individuals with femoroacetabular impingement syndrome
Bibliographic record
Abstract
INTRODUCTION/OBJECTIVES: Femoroacetabular impingement syndrome (FAIS), a known contributor to hip osteoarthritis, is frequently treated through hip arthroscopy. However, the impact of preoperative hip osteoarthritis severity on quality of life (QoL) post-surgery remains unclear. This study tested the hypothesis that individuals with moderate-to-severe hip osteoarthritis would show smaller QoL improvement over two years compared to those without or mild hip osteoarthritis. METHODS: In this retrospective cohort study, 259 patients diagnosed with FAIS were included from a single orthopaedic clinic. Participants were categorized based on hip osteoarthritis severity using the Kellgren and Lawrence grade (KLG), with 147 classified as having no hip osteoarthritis (KLG = 0), 77 with mild osteoarthritis (KLG = 1), and 36 with moderate-to-severe osteoarthritis (KLG≥2 (72 % KLG = 2, 25 % KLG = 3, 3 % KLG = 4)). QoL was assessed pre-operatively and at multiple post-operative time points using the 33-item International Hip Outcome Tool (iHOT-33). Linear mixed effects modelling assessed QoL changes over two years. RESULTS: All groups, regardless of hip osteoarthritis severity, demonstrated statistically significant improvements in iHOT-33 scores over two years postoperatively (p < 0.001, d = 0.20-0.79). Patients without hip osteoarthritis (β = 0.32, 95%CI: 0.01:0.64, p = 0.049) and those with mild osteoarthritis (β = 0.28, 95%CI: 0.04:0.52, p = 0.031) showed steady improvements in QoL. Conversely, those with moderate-to-severe osteoarthritis exhibited more limited QoL improvement (β = 0.05, 95%CI: -0.14:0.23, p = 0.452). CONCLUSIONS: Pre-operative hip osteoarthritis severity influenced postoperative QoL outcomes following hip arthroscopy in individuals with FAIS. Individuals without or with mild hip osteoarthritis experienced more consistent QoL improvements over two years compared to those with moderate-to-severe osteoarthritis. These findings highlight the importance of tailoring treatment strategies and managing patient expectations based on hip osteoarthritis severity. LEVEL OF EVIDENCE: Level III (Observational Studies).
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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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".