Impact of Obesity on Short-Stem Total Hip Arthroplasty
Author Information
Author(s): Gruber Michael Stephan, Schöning Johannes, Bischofreiter Martin, Kindermann Harald, Schulz Arndt-Peter, Hinz Nico, Mayböck Emanuel, Ortmaier Reinhold
Primary Institution: Department of Orthopedic Surgery, Ordensklinikum Linz Barmherzige Schwestern, Vinzenzgruppe Center of Orthopedic Excellence, Teaching Hospital of the Paracelsus Medical University, Salzburg, Austria
Hypothesis
Does obesity influence postoperative subsidence and clinical outcomes after short-stem total hip arthroplasty?
Conclusion
Obesity is associated with increased subsidence in short-stem total hip arthroplasty, especially in patients with larger planned stem sizes.
Supporting Evidence
- The obesity group had a mean subsidence of 2.6 mm compared to 2.2 mm in the nonobesity group.
- Regression analysis showed that planned stem size significantly correlated with subsidence (p = 0.005).
- Clinical outcomes improved significantly in both groups, but the obesity group had lower Harris Hip Scores.
Takeaway
This study found that heavier people tend to have more problems with their hip implants sinking into the bone after surgery, especially if they have bigger implants.
Methodology
A retrospective cohort study analyzing 163 patients who underwent short-stem THA, categorized by BMI, with subsidence and clinical outcomes assessed.
Potential Biases
Potential selection bias due to uniform surgical technique and experience of surgeons.
Limitations
Single-institution study, limited BMI classification, and lack of evaluation of other confounding factors like smoking.
Participant Demographics
Patients included 86 with obesity (BMI ≥ 30 kg/m2) and 77 nonobese (BMI < 30 kg/m2), with no significant differences in age or sex.
Statistical Information
P-Value
0.015
Statistical Significance
p = 0.015
Digital Object Identifier (DOI)
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