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Int J Geriatr Psychiatry · Sep 2008
Pre-operative inflammatory markers and the risk of postoperative delirium in elderly patients.
- Afina W Lemstra, Kees J Kalisvaart, Ralph Vreeswijk, Willem A van Gool, and Piet Eikelenboom.
- Department of Neurology, Academic Medical Centre, Amsterdam, The Netherlands. a.w.lemstra@gmail.com
- Int J Geriatr Psychiatry. 2008 Sep 1;23(9):943-8.
ObjectivePathophysiological mechanisms leading to delirium are not clear. Age is a known risk factor and hypothesised to be accompanied by a low-grade inflammatory state. Previous studies have shown an association between delirium and circulating proinflammatory markers in acutely ill and postoperative patients. In light of the ageing/inflammation theory, we investigated the association of these markers with delirium in not acutely ill, elderly patients.MethodsIn a prospective nested case-control study levels of C-reactive protein (CRP), interleukin 6 (Il-6), insulin growth factor 1 (IGF-1) were measured pre-operatively in elderly patients admitted for hip-surgery. These levels were compared between patients who later developed a post-operative delirium and patients who did not. Patients were matched for age and disease severity.ResultsEighteen patients who developed delirium post-operatively were matched with 50 controls. Median APACHE-scores were below 16 in both groups. Pre-operative serum concentrations of CRP, Il-6 and IGF-1 did not differ between groups. IL-6 levels were associated with a measure of cognitive impairment.ConclusionIn the present study no relationship was found between levels of pre-operative circulating pro-inflammatory markers and post-operative delirium in elderly patients, who were free from acute or severe disease.
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