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Vitamin D and delirium in critically ill patients: a preliminary investigation.


ABSTRACT: The pathophysiology of delirium in critical illness is unclear. 25-OH vitamin D (25-OHD) has neuroprotective properties but a relationship between serum 25-OHD and delirium has not been examined. We tested the hypothesis that low serum 25-OHD is associated with delirium during critical illness.In a prospective cohort of 120 medical intensive care unit (ICU) patients, blood was collected within 24 hours of ICU admission for measurement of 25-OHD. Delirium was identified once daily using the Confusion Assessment Method for the ICU. Multivariable logistic regression was used to analyze the association between 25-OHD and delirium assessed the same day and the subsequent day after 25-OHD measurement, with adjustments for age and severity of illness.Median age was 52 years (interquartile range, 40-62), and Acute Physiology and Chronic Health Evaluation II was 23 (interquartile range, 17-30). Thirty-seven patients (41%) were delirious on the day of 25-OHD measurement. 25-OHD levels were not associated with delirium on the day of 25-OHD measurement (odds ratio, 1.01; 95% confidence interval, 0.98-1.02) or on the day after measurement (odds ratio, 1.01; 95% confidence interval, 0.99-1.03).This pilot study suggests that 25-OHD levels measured early during critical illness are not important determinants of delirium risk. Since 25-OHD levels can fluctuate during critical illness, a study of daily serial measurements of 25-OHD levels and their relationship to delirium during the duration of critical illness may yield different results.

SUBMITTER: Morandi A 

PROVIDER: S-EPMC3498519 | biostudies-literature | 2013 Jun

REPOSITORIES: biostudies-literature

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Vitamin D and delirium in critically ill patients: a preliminary investigation.

Morandi Alessandro A   Barnett Nicolas N   Miller Russel R RR   Girard Timothy D TD   Pandharipande Pratik P PP   Ely Eugene W EW   Ware L B LB  

Journal of critical care 20120809 3


<h4>Purpose</h4>The pathophysiology of delirium in critical illness is unclear. 25-OH vitamin D (25-OHD) has neuroprotective properties but a relationship between serum 25-OHD and delirium has not been examined. We tested the hypothesis that low serum 25-OHD is associated with delirium during critical illness.<h4>Materials and methods</h4>In a prospective cohort of 120 medical intensive care unit (ICU) patients, blood was collected within 24 hours of ICU admission for measurement of 25-OHD. Deli  ...[more]

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