• K Stavem, M G Naumann, U Sigurdsen, and S E Utvåg.
• Akershus University Hospital, Lørenskog, Norway.
• Bone Joint J. 2017 Oct 1; 99-B (10): 1389-1398.

AimsThis study assessed the association of classes of body mass index in kg/m2 (classified as normal weight 18.5 kg/m2 to 24.9 kg/m2, overweight 25.0 kg/m2 to 29.9 kg/m2, and obese ≥ 30.0 kg/m2) with short-term complications and functional outcomes three to six years post-operatively for closed ankle fractures.Patients And MethodsWe performed a historical cohort study with chart review of 1011 patients who were treated for ankle fractures by open reduction and internal fixation in two hospitals, with a follow-up postal survey of 959 of the patients using three functional outcome scores.ResultsObese patients had more severe overall complications and higher odds of any complication than the normal weight group, with adjusted odds ratio 1.67 (95% confidence interval (CI) 1.08 to 2.59; p = 0.021) and 1.71 (95% CI 1.10 to 2.65; p = 0.016), respectively. In total 479 patients (54.6%) responded to the questionnaire. Obese patients had worse scores on the Olerud and Molander Ankle Score (p < 0.001), Self-Reported Foot and Ankle Questionnaire (p = 0.003) and Lower Extremity Functional Scale (p = 0.01) than those with normal weight. In contrast, overweight patients did not have worse functional scores than those with normal weight.ConclusionObese patients had more complications, more severe complications, and worse functional outcomes three to six years after ankle surgery compared with those with normal weight. Cite this article: Bone Joint J 2017;99-B:1389-98.©2017 The British Editorial Society of Bone & Joint Surgery.

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