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Higher BMI may lead to smaller improvements and higher complications after THA
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Patients with a higher body mass index who underwent total hip arthroplasty experienced marginally smaller improvements and higher complication rates, according to study results.
Researchers examined the influence of body mass index (BMI) on patient outcomes and complications following total hip arthroplasty (THA) by comparing outcomes by BMI groups. Patients with a BMI of 19 kg/m2 to 29.9 kg/m2 were classified as the reference group, 30 kg/m2 to 34.9 kg/m2 as obese class I and 35 kg/m2 or greater as obese class II/III.
After adjusting for other influential variables, study results showed patients in obese class I and class II/III with a cemented THA and patients in obese class II/III with cementless THA had significantly lower improvements in Oxford Hip Score (OHS). Overall, self-reported disability, preoperative function and health scores, and comorbidities had a greater influence on change in OHS than BMI, according to the researchers.
Although a lower preoperative OHS predicted greater improvement, the researchers found lower improvements were predicted by the presence of disability and comorbidities, poorer health and higher BMI.
Univariate analysis showed patients in cementless obese class II/III experienced significantly lower improvements in the EQ5D index compared with the reference BMI group. The researchers also found wound complication was significantly higher in obese class II/III for both cemented and cementless patients.
Disclosure: Reed is on the speakers’ bureau for Biomet and received research support from Heraeus.
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