Body Mass Index and the Impact on Hospital Resource Use in Patients Undergoing Total Knee Arthroplasty

Abstract We identified all total knee arthroplasty patients between 1996 and 2004 and classified them by preoperative body mass index (BMI) as normal (BMI, 18.5-24.9 kg/m2 ), overweight (BMI, 25.0-29.9 kg/m2 ), obese (30-34.9 kg/m2 ), or morbidly obese (≥ 35.0 kg/m2 ). Of 5521 patients, 769 had a no...

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Bibliographic Details
Published in:The Journal of arthroplasty 2010-12, Vol.25 (8), p.1250-1257.e1
Main Authors: Batsis, John A., MD, Naessens, James M., ScD, MPH, Keegan, Mark T., MD, Huddleston, Paul M., MD, Wagie, Amy E., BS, Huddleston, Jeanne M., MD
Format: Article
Language:English
Subjects:
Aged
Aged, 80 and over
arthroplasty
Arthroplasty, Replacement, Knee - economics
Body Mass Index
costs
Female
Health Resources - economics
Health Resources - utilization
Hospital Costs - statistics & numerical data
Humans
length of stay
Length of Stay - economics
Male
Middle Aged
Obesity - economics
Obesity, Morbid - economics
Orthopedics
Overweight - economics
resource use
Retrospective Studies
Treatment Outcome
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Summary:Abstract We identified all total knee arthroplasty patients between 1996 and 2004 and classified them by preoperative body mass index (BMI) as normal (BMI, 18.5-24.9 kg/m2 ), overweight (BMI, 25.0-29.9 kg/m2 ), obese (30-34.9 kg/m2 ), or morbidly obese (≥ 35.0 kg/m2 ). Of 5521 patients, 769 had a normal BMI, 1938 were overweight, 1539 were obese, and 1275 were morbidly obese. Adjusted length of stay was no different between normal (4.85 days), overweight (4.84 days), obese (4.86 days), or morbidly obese patients (4.93 days) ( P = .30). Overall costs were similar among normal ($15 386), overweight ($15 430), obese ($15 646), or morbidly obese patients ($15 752) ( P = .24). Postsurgical costs were no different among normal ($9860), overweight ($9889), obese ($10 063), or morbidly obese patients ($10 136) ( P = .44). Our results suggest that increased BMI does not lead to increased hospital resource use for total knee arthroplasty.
ISSN:0883-5403
1532-8406
DOI:10.1016/j.arth.2009.09.009