Patients in group VIS high versus VIS low with longer duration of mechanical ventilation (p = 0.001; OR = 5.8 95% CI was 1.9 to 18.0), length of stay in intensive care (p = 0.001; OR = 6.5; 95% CI: 2.1 - 20.5) and negative fluid balance (p = 0.005; OR = 4.6; 95% CI: 1, 5 - 14.4).