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Risk factors for delirium in advanced cancer patients: A systematic review and meta-analysis

Published:January 07, 2023DOI:https://doi.org/10.1016/j.ejon.2023.102267

      Highlights

      • Here, we first report specific risk factors for delirium in advanced cancer patients as identified via meta-analysis.
      • This study reports 12 independent risk factors and details the strength of their associations via pooled analyses.
      • Our evidence-based risk stratification to guide clinical management of delirium in advanced cancer patients.

      Abstract

      Purpose

      To systematically collect published research in order to identify and quantify risk factors for delirium in advanced cancer patients.

      Methods

      The Cochrane Library, PubMed, Proquest, CINAHL, Web of Science, Ovid MEDLINE, Embase, Scopus, Chinese Wanfang Data, Chinese Periodical Full-text Database (VIP), Chinese Biomedical Literature Database (CBM), and Chinese National Knowledge Infrastructure (CNKI) were systematically searched for cohort or case-control studies reporting individual risk factors for delirium among advanced-stage cancer patients published prior to March 2022. The Newcastle-Ottawa Scale was used to assess the methodological quality of included studies. The pooled adjusted odds ratio (aOR) and its 95% confidence interval were calculated using the RevMan 5.4 software package.

      Results

      A total of 15 studies with data from 3106 advanced cancer patients were included in our analysis. Nine studies were high-quality and six were of moderate quality. Pooled analyses revealed that 11 risk factors were statistically significant. High-intensity risk factors included sleep disturbance, infection, cachexia and the Palliative Prognostic Index; medium-intensity risk factors included male sex, renal failure, dehydration and drowsiness; low-intensity risk factors included age, total bilirubin and opioid use. Antibiotic use was found to have been a protective factor.

      Conclusions

      We identified 12 independent risk factors that were significantly associated with delirium in advanced cancer patients and provide an evidence-based foundation to implement appropriate preventive strategies.

      Keywords

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