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Table 4 Comparison of copeptin levels between survivors and nonsurvivors (Mann–Whitney test)

From: Copeptin, a novel prognostic biomarker in ventilator-associated pneumonia

Variable   Median (pmol/l) Interquartile range P value
Copeptin on day 0 Survivor 44.7 7.8 to 81.6 0.006
  Nonsurvivor 74.2 12.3 to 136.1  
Copeptin on day 4 Survivor 34.5 2.6 to 66.4 0.006
  Nonsurvivor 72.3 38.6 to 106.0