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Predisposing and precipitating risk factors for delirium in palliative care patients


Seiler, Annina; Schubert, Maria; Hertler, Caroline; Schettle, Markus; Blum, David; Guckenberger, Matthias; Weller, Michael; Ernst, Jutta; von Känel, Roland; Boettger, Soenke (2019). Predisposing and precipitating risk factors for delirium in palliative care patients. Palliative & Supportive Care:Epub ahead of print.

Abstract

OBJECTIVE: Delirium is a common complication in palliative care patients, especially in the terminal phase of the illness. To date, evidence regarding risk factors and prognostic outcomes of delirium in this vulnerable population remains sparse.
METHOD: In this prospective observational cohort study at a tertiary care center, 410 palliative care patients were included. Simple and multiple logistic regression models were used to identify associations between predisposing and precipitating factors and delirium in palliative care patients.
RESULTS: The prevalence of delirium in this palliative care cohort was 55.9% and reached 93% in the terminally ill. Delirium was associated with prolonged hospitalization (p < 0.001), increased care requirements (p < 0.001) and health care costs (p < 0.001), requirement for institutionalization (OR 0.11; CI 0.069-0.171; p < 0.001), and increased mortality (OR 18.29; CI 8.918-37.530; p < 0.001). Predisposing factors for delirium were male gender (OR 2.19; CI 1.251-3.841; p < 0.01), frailty (OR 15.28; CI 5.885-39.665; p < 0.001), hearing (OR 3.52; CI 1.721-7.210; p < 0.001), visual impairment (OR 3.15; CI 1.765-5.607; p < 0.001), and neoplastic brain disease (OR 3.63; CI 1.033-12.771; p < 0.05). Precipitating factors for delirium were acute renal failure (OR 6.79; CI 1.062-43.405; p < 0.05) and pressure sores (OR 3.66; CI 1.102-12.149; p < 0.05).
SIGNIFICANCE OF RESULTS: Our study identified several predisposing and precipitating risk factors for delirium in palliative care patients, some of which can be targeted early and modified to reduce symptom burden.

Abstract

OBJECTIVE: Delirium is a common complication in palliative care patients, especially in the terminal phase of the illness. To date, evidence regarding risk factors and prognostic outcomes of delirium in this vulnerable population remains sparse.
METHOD: In this prospective observational cohort study at a tertiary care center, 410 palliative care patients were included. Simple and multiple logistic regression models were used to identify associations between predisposing and precipitating factors and delirium in palliative care patients.
RESULTS: The prevalence of delirium in this palliative care cohort was 55.9% and reached 93% in the terminally ill. Delirium was associated with prolonged hospitalization (p < 0.001), increased care requirements (p < 0.001) and health care costs (p < 0.001), requirement for institutionalization (OR 0.11; CI 0.069-0.171; p < 0.001), and increased mortality (OR 18.29; CI 8.918-37.530; p < 0.001). Predisposing factors for delirium were male gender (OR 2.19; CI 1.251-3.841; p < 0.01), frailty (OR 15.28; CI 5.885-39.665; p < 0.001), hearing (OR 3.52; CI 1.721-7.210; p < 0.001), visual impairment (OR 3.15; CI 1.765-5.607; p < 0.001), and neoplastic brain disease (OR 3.63; CI 1.033-12.771; p < 0.05). Precipitating factors for delirium were acute renal failure (OR 6.79; CI 1.062-43.405; p < 0.05) and pressure sores (OR 3.66; CI 1.102-12.149; p < 0.05).
SIGNIFICANCE OF RESULTS: Our study identified several predisposing and precipitating risk factors for delirium in palliative care patients, some of which can be targeted early and modified to reduce symptom burden.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Radiation Oncology
04 Faculty of Medicine > University Hospital Zurich > Klinik für Konsiliarpsychiatrie und Psychosomatik
Dewey Decimal Classification:610 Medicine & health
Uncontrolled Keywords:General Nursing, Clinical Psychology, Psychiatry and Mental health, General Medicine, Delirium; Palliative care patients; Palliative treatment; Precipitating factors; Predisposing factors; Risk factors
Language:English
Date:14 November 2019
Deposited On:04 Feb 2020 15:57
Last Modified:29 Jul 2020 13:20
Publisher:Cambridge University Press
ISSN:1478-9515
OA Status:Closed
Publisher DOI:https://doi.org/10.1017/s1478951519000919
PubMed ID:31722766

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