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Does body mass index affect the outcome of unicompartmental knee replacement?
Knee. 2013 Dec; 20(6):461-5.KNEE

Abstract

BACKGROUND

Obesity is considered to be a contraindication for unicompartmental knee replacement (UKR). The aim was to study the impact of BMI on failure rate and clinical outcome of the Oxford mobile bearing UKR.

METHOD

Two thousand four hundred and thirty-eight medial Oxford UKRs were studied prospectively and divided into groups: BMI<25 (n=378), BMI 25 to <30 (n=856), BMI 30 to <35 (n=712), BMI 35 to <40 (n=286), and BMI 40 to <45 (n=126) and BMI≥45 (n=80).

RESULTS

There was no significant difference in survival rate between groups. At a mean follow-up of 5years (range 1-12years) there was no significant difference in the Objective American Knee Society Score between groups. There was a significant (p<0.01) trend with the Oxford Knee Score (OKS) and Functional American Knee Society Scores decreasing with increasing BMI. As there was an opposite trend (p<0.01) in pre-operative OKS, the change in OKS increased with increasing BMI (p=0.048). The mean age at surgery was significantly (p<0.01) lower in patients with higher BMI.

CONCLUSIONS

Increasing BMI was not associated with an increasing failure rate. It was also not associated with a decreasing benefit from the operation. Therefore, a high BMI should not be considered a contra-indication to mobile bearing UKR.

LEVEL OF EVIDENCE

IV.

Authors+Show Affiliations

The Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Headington, Oxford, UK; The Nuffield Orthopaedic Centre, Headington, Oxford, UK. Electronic address: david.murray@ndorms.ox.ac.uk.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

23110877

Citation

Murray, D W., et al. "Does Body Mass Index Affect the Outcome of Unicompartmental Knee Replacement?" The Knee, vol. 20, no. 6, 2013, pp. 461-5.
Murray DW, Pandit H, Weston-Simons JS, et al. Does body mass index affect the outcome of unicompartmental knee replacement? Knee. 2013;20(6):461-5.
Murray, D. W., Pandit, H., Weston-Simons, J. S., Jenkins, C., Gill, H. S., Lombardi, A. V., Dodd, C. A., & Berend, K. R. (2013). Does body mass index affect the outcome of unicompartmental knee replacement? The Knee, 20(6), 461-5. https://doi.org/10.1016/j.knee.2012.09.017
Murray DW, et al. Does Body Mass Index Affect the Outcome of Unicompartmental Knee Replacement. Knee. 2013;20(6):461-5. PubMed PMID: 23110877.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Does body mass index affect the outcome of unicompartmental knee replacement? AU - Murray,D W, AU - Pandit,H, AU - Weston-Simons,J S, AU - Jenkins,C, AU - Gill,H S, AU - Lombardi,A V, AU - Dodd,C A F, AU - Berend,K R, Y1 - 2012/10/27/ PY - 2012/05/08/received PY - 2012/09/26/revised PY - 2012/09/28/accepted PY - 2012/11/1/entrez PY - 2012/11/1/pubmed PY - 2014/8/13/medline KW - Obesity KW - Outcomes KW - Unicompartmental knee replacement SP - 461 EP - 5 JF - The Knee JO - Knee VL - 20 IS - 6 N2 - BACKGROUND: Obesity is considered to be a contraindication for unicompartmental knee replacement (UKR). The aim was to study the impact of BMI on failure rate and clinical outcome of the Oxford mobile bearing UKR. METHOD: Two thousand four hundred and thirty-eight medial Oxford UKRs were studied prospectively and divided into groups: BMI<25 (n=378), BMI 25 to <30 (n=856), BMI 30 to <35 (n=712), BMI 35 to <40 (n=286), and BMI 40 to <45 (n=126) and BMI≥45 (n=80). RESULTS: There was no significant difference in survival rate between groups. At a mean follow-up of 5years (range 1-12years) there was no significant difference in the Objective American Knee Society Score between groups. There was a significant (p<0.01) trend with the Oxford Knee Score (OKS) and Functional American Knee Society Scores decreasing with increasing BMI. As there was an opposite trend (p<0.01) in pre-operative OKS, the change in OKS increased with increasing BMI (p=0.048). The mean age at surgery was significantly (p<0.01) lower in patients with higher BMI. CONCLUSIONS: Increasing BMI was not associated with an increasing failure rate. It was also not associated with a decreasing benefit from the operation. Therefore, a high BMI should not be considered a contra-indication to mobile bearing UKR. LEVEL OF EVIDENCE: IV. SN - 1873-5800 UR - https://www.unboundmedicine.com/medline/citation/23110877/Does_body_mass_index_affect_the_outcome_of_unicompartmental_knee_replacement L2 - https://linkinghub.elsevier.com/retrieve/pii/S0968-0160(12)00169-X DB - PRIME DP - Unbound Medicine ER -