Methods Single centre cohort study. All adult patients admitted to the medical emergency ward of Odense University Hospital from March 2009 to August 2011, who had an arterial blood gas sample taken within six hours after admission were enrolled. Lactate was stratified in 1mmol/l (mM) intervals. Ten-day mortality after admission was assessed through the Danish Centralised Civil Registration system. A further stratification according to systolic hypotension (< 90 mmHg) was performed. Finally, a survival analysis (Kaplan-Meyer plot) was performed for the first ten days.
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