Body Mass Index and the Risk of Postoperative Complications After Total Knee Arthroplasty.
Journal
The Journal of the American Academy of Orthopaedic Surgeons
ISSN: 1940-5480
Titre abrégé: J Am Acad Orthop Surg
Pays: United States
ID NLM: 9417468
Informations de publication
Date de publication:
09 Oct 2024
09 Oct 2024
Historique:
received:
27
04
2024
accepted:
17
08
2024
medline:
9
10
2024
pubmed:
9
10
2024
entrez:
9
10
2024
Statut:
aheadofprint
Résumé
Given the growing prevalence of obesity, it is crucial to understand the effect of obesity on complications after total knee arthroplasty (TKA). This study aims to assess the relationship between body mass index (BMI) and postoperative periprosthetic joint infection (PJI), medical complications, and surgical complications after TKA. The Premier Healthcare Database was used to identify all primary elective TKAs between 2016 and 2021. The primary outcome was risk of PJI within 90 days of surgery. Using logistic regression, restricted cubic splines were generated to assess the relationship between BMI as a continuous variable and PJI risk. Bootstrap simulation was then done to identify a BMI inflection point on the final restricted cubic spline model past which the risk of PJI increased. The relationship between BMI and composite 90-day medical and surgical complications was also assessed. A direct relationship was observed between increasing BMI and increasing risk of PJI with a BMI changepoint of 31 kg/m2 identified as being associated with increased risk. Above a BMI of 31 kg/m2, there was an average relative risk increase of PJI of 13.6% for every unit BMI. This relative risk per unit BMI increased from 5.8% for BMI 31 to 39 to 11.5% between BMI 40 and 49 kg/m2, and 21.3% for BMIs ≥50 kg/m2. Similarly, a direct relationship was also found between increasing BMI and both medical and surgical complications with BMI changepoints of 34 and 32 kg/m2 identified, respectively. Obese patients with a BMI >31 kg/m2 were at increased risk of PJI. Although the relative risk increase was small per unit BMI above 31 kg/m2, the cumulative increase in risk may be marked for patients with higher BMIs. These data should be used to inform discussions that involve shared decision making between patients and surgeons who weigh the risks and benefits of surgery.
Identifiants
pubmed: 39383114
doi: 10.5435/JAAOS-D-24-00481
pii: 00124635-990000000-01123
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Informations de copyright
Copyright © 2024 by the American Academy of Orthopaedic Surgeons.
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