Light and the outcome of the critically ill: an observational cohort study. Critical care, July 2012, 16: R132.
Castro, R.A., et al.
http://ccforum.com/content/16/4/R132/abstract
Light before and during acute illness has been associated with both benefit and harm in animal models and small human studies. Our objective was to determine the associations of light duration (photoperiod) and intensity (insolation) before and during critical illness with hospital mortality in ICU patients. Based on the 'winter immunoenhancement' theory, we tested the hypothesis that a shorter photoperiod before critical illness is associated with improved survival.
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