ArticleFrontiers in medicine2026
Association of mild cognitive impairment and comorbid depression with postoperative delirium in patients undergoing knee/hip arthroplasty: a prospective cohort study.
Article in Frontiers in medicine, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: Postoperative delirium (POD) is common after surgery, involving acute disturbances in attention and cognition. While mild cognitive impairment (MCI) and depression each influence cognition, their combined impact on POD is unclear. We aimed to assess the effect of MCI with comorbid depression on POD and explore whether cerebrospinal fluid (CSF) biomarkers mediate this relationship. Methods: This study included 1,464 knee/hip arthroplasty patients divided into four preoperative diagnostic groups: no disease, MCI only, depression only, and MCI with depression. CSF markers were compared between groups, with subgroup analyses by age/gender. POD risk factors were assessed using multifactorial logistic regression, sensitivity analyses, and mediation effect modeling of CSF markers. A POD prediction model was developed and its performance was evaluated via ROC curve analysis, and three-year postoperative survival differences were analyzed. Results: POD incidence was 13.9% ( Conclusions: MCI with comorbid depression is an independent risk factor for POD, and this association is mediated in part by changes in CSF biomarkers.
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