Effect of body mass index on patients with multiligamentous knee injuries

T J Ridley; Shane Cook; Matthew Bollier; Mark McCarthy; Yubo Gao; Brian Wolf; Annunziato Amendola

doi:10.1016/j.arthro.2014.05.035

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Effect of body mass index on patients with multiligamentous knee injuries

Journal article

Peer reviewed

Effect of body mass index on patients with multiligamentous knee injuries

T J Ridley, Shane Cook, Matthew Bollier, Mark McCarthy, Yubo Gao, Brian Wolf and Annunziato Amendola

Arthroscopy, Vol.30(11), pp.1447-1452

11/2014

DOI: 10.1016/j.arthro.2014.05.035

PMID: 25064756

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Abstract

Our goal was to evaluate the impact of body mass index (BMI) on complications and associated injuries in patients undergoing surgical treatment for multiligamentous knee injuries (MLKIs). Over a period of 10 years, 126 MLKIs (123 patients) were included in the study. The inclusion criteria were (1) injury to 2 or more knee ligaments, (2) multiligament repair and/or reconstruction performed by 1 of 3 sports medicine orthopaedic surgeons at our institution, and (3) minimum of 1 year of follow-up. A chart review was performed to collect demographic data, mechanism of injury, ligaments involved, complications, and associated neurovascular injuries. Lastly, patients were divided by BMI into non-obese (<30 kg/m(2)) and obese (≥30 kg/m(2)) groups. Of the 126 MLKIs, 87 occurred in non-obese patients and 39 occurred in obese patients. Surgical complication rates for non-obese and obese patients were 8.05% and 15.4%, respectively (P = .21). Revisions were needed in 8.05% and 5.1% of patients in these groups, respectively (P = .72). Three wound complications were found in the obese group only. Vascular injuries were found in 2.3% and 7.7% of patients in the non-obese and obese groups, respectively (P = .17). The rates of nerve injuries were 11.49% and 20.51%, respectively (P = .18). Patients in the obese group were most likely to have an MLKI from low-energy mechanisms, disregarding sports-related injuries (51.28%, P = .02). Using a logistic model and BMI as a continuous variable, we found that a 1-unit increase in BMI increased the odds ratio of complications by 9.2%, with statistical significance (P = .0174). In addition, post hoc power analysis using previous literature showed that this study could produce satisfactory power. Our results indicate that (1) obese individuals are significantly more likely to have an MLKI caused by low-energy mechanisms and (2) complication rates increase by 9.2% for every 1-unit increase in BMI. Level III, retrospective comparative study.

Body Mass Index

Obesity - complications

Humans

Ligaments, Articular - surgery

Male

Postoperative Complications - epidemiology

Ligaments, Articular - injuries

Knee Injuries - surgery

Obesity - epidemiology

Adult

Female

Knee Injuries - complications

Multiple Trauma - complications

Retrospective Studies

Multiple Trauma - surgery

Vascular System Injuries - epidemiology

Details

Title: Subtitle: Effect of body mass index on patients with multiligamentous knee injuries
Creators: T J Ridley - University of Iowa Carver College of Medicine, Iowa City, Iowa, U.S.A.. Electronic address: taylor-ridley@uiowa.edu
Shane Cook - Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, Iowa, U.S.A
Matthew Bollier - Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, Iowa, U.S.A
Mark McCarthy - Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, Iowa, U.S.A
Yubo Gao - Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, Iowa, U.S.A
Brian Wolf - Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, Iowa, U.S.A
Annunziato Amendola - Department of Orthopaedics and Rehabilitation, University of Iowa, Iowa City, Iowa, U.S.A
Resource Type: Journal article
Publication Details: Arthroscopy, Vol.30(11), pp.1447-1452
DOI: 10.1016/j.arthro.2014.05.035
PMID: 25064756
NLM abbreviation: Arthroscopy
ISSN: 0749-8063
eISSN: 1526-3231
Publisher: Elsevier; United States
Language: English
Date published: 11/2014
Academic Unit: Orthopedics and Rehabilitation; Physical Therapy and Rehabilitation Science; Internal Medicine
Record Identifier: 9984040253002771

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