Lower preoperative serum uric acid level may be a risk factor for postoperative delirium in older patients undergoing hip fracture ... View Full Text


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Article Info

DATE

2022-09-07

AUTHORS

Lin Xu, Wenyuan Lyu, Penghui Wei, Qiang Zheng, Chengwei Li, Zheng Zhang, Jianjun Li

ABSTRACT

BackgroundPostoperative delirium (POD) is a common complication after hip fracture surgery that is associated with various short- and long-term outcomes. The mechanism of POD may be associated with the oxidative stress process. Uric acid has been shown to provide a neuroprotective effect in various neurodegenerative diseases through its antioxidant properties. However, it is unclear whether lower preoperative serum uric acid levels are associated with the development of POD after hip fracture surgery. Therefore, this study assessed the association of lower preoperative uric acid levels in patients with POD during hospitalization.MethodsThis is a matched retrospective case-control study that included 96 older patients (≥65 y) who underwent hip fracture surgery. POD was diagnosed using the Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition. Patients diagnosed with POD (cases) were matched 1:1 with patients without POD (controls) on the basis of age, sex, and anesthesia type. The relationship between preoperative uric acid and POD was analyzed by multivariable analysis.ResultsThe POD and non-POD groups each had 48 patients. In the univariate analysis, lower log preoperative serum uric acid value, higher neutrophil-to-lymphocyte ratio, and cerebrovascular disease were more likely in patients with POD than in those with no POD. Multivariable conditional logistic regression analysis showed that lower log preoperative serum uric acid (adjusted odds ratio [aOR], 0.028; confidence interval [CI], 0.001–0.844; p = 0.040), higher neutrophil-to-lymphocyte ratio (aOR, 1.314; 95% CI, 1.053–1.638; p = 0.015), and increased surgery duration (aOR, 1.034; 95% CI, 1.004–1.065; p = 0.024) were associated with increased risk of POD.ConclusionsLower preoperative serum uric acid levels may be an independent risk factor for POD after adjustment for possible confounding factors. However, large prospective studies are needed to confirm this finding. More... »

PAGES

282

Identifiers

URI

http://scigraph.springernature.com/pub.10.1186/s12871-022-01824-0

DOI

http://dx.doi.org/10.1186/s12871-022-01824-0

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1150816017

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/36071379


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