Independent of pneumonia etiology , CT-ProVasopressin correlated significantly with the pneumonia severity index ( r = 0.56 , p < 0.05 ) , ICU admission ( adjusted odds ratio per decile , 95 % CI ) ( 1.6 , 1.2 - 2.0 ) , and 30-day-mortality ( 1.8 , 1.3 - 2.4 ) .