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- Talk
- UK
Key Learnings from the Registry: The Associations between Obesity, Revision, Mortality and PROMS in Total Hip Replacement
Description
In this presentation, Adrian Sayers, a senior research fellow specializing in statistics at the Musculoskeletal Research Unit at the University of Bristol, discusses two significant research papers from his team. He begins by acknowledging the contributions of co-authors and supporting organizations.
The first paper explores the relationship between obesity, surgical revision, and mortality in nearly 800,000 initial patient samples, ultimately focusing on over 400,000 patients for robust mortality and revision analysis. Key findings indicate that class-III obese patients (BMI > 40) have a 6.7% revision rate after ten years, significantly higher than the 4.9% revision rate of normal weight patients. Adjusted analyses reveal a 43% increased likelihood of revision among class-III obese patients, while mortality results surprisingly show that obesity may offer short-term protective benefits post-surgery, despite being a risk factor for revision.
The second paper delves into the complexities of analyzing Patient-Reported Outcome Measures (PROMs) data, highlighting the need for proper methodological guidance, particularly in cohort studies. Sayers outlines various analysis methods, including simple and complex approaches, cautioning against the biases introduced by less rigorous analyses. He presents simulations that underscore the importance of using multi-level Tobit models for accurate results. The findings suggest that obesity does not lessen the benefits derived from total hip replacement surgery, countering often-held assumptions about BMI influencing surgical outcomes.
Through comprehensive analysis, Sayers concludes that there is no substantial evidence to warrant restricting surgery for obese patients, emphasizing the need for nuanced understanding in patient care and clinical practices.