Risk factors for ICU mortality Survived (n=60) Deceased (n=16) p value
Age, years 53,79 ± 18,95 59,37 ±  14,36 0,26
Female sex (%) 10 (16,67) 9 (56,25) <0,01
Patients baseline conditions (%)      
Alcohol abuse (%) 3 (5) 2 (12,5) 0,32
Cirrhosis (%) 1 (1,67) 1 (6,25) 0,36
COPD (%) 11 (18,33) 3 (43,7) 0,91
Diabetes (%) 6 (10) 3 (43,75) 0,36
Surgery (%) 30 (50) 11 (68,75) 0,22
Charlson Comorbidity Index 1,36 ± 2,04 1,94   ± 1,73 0,51
Previous 6 months hospitalisation (%) 19 (31,67) 6 (37,5) 0,66
Provenance from other wards (%) 26 (43,33) 11 (68,75) 0,10
Days of pre-ICU hospitalisation 2,57 ±  8,86 5,87 ± 6,56 0,15
Predicted mortality by SAPS     0,24
SAPS II 44,64  ± 15,19 51 ± 16,04   
SAPS III 62.42  ± 20,40 60,33  ±  17,27  
Duration of antibiotic therapy, days 18,46 ± 11,63 20,75 ± 23,64 0,64
Central venous catheter (%) 57 (95) 16 (100) 0,95
Number of catheter-days 20 ± 13,49 31,57 ±  26,25 0,03
Length of mechanical ventilation, days 17,42 ± 10,79 31,25 ± 26,73 <0,01
Pseudomonas infection (%) 27( 45) 11 (68,75) 0,88
Multi Drug Resistant pathogen infection (%) 13 (21,67) 5 (31,25) 0,072
MDR-Pseudomonas VAP (%) 9 (69,23) 5(100)  
Dialysis (%) 2 (3,33) 4 (25) 0,01
Duration of dialysis, days 1,36 ± 6,21 2,25 ±  5,98 0,12
Steroid therapy (%) 14 (23,33) 7 (43,75) <0,01
Days with steroid therapy 2,08 ± 5,46 4,57 ±  9,21 0,93
Tracheostomy (%) 54 (90) 12 (75) 0,11
Days of hospital stay preceding VAP 7,87 ± 7,61 13,06 ± 12,34 0,48
Length of hospital stay, days 23,76 ± 13,57  28,87 ± 24,83  0.10
Table 3: Univariate analysis of risk factors for ICU mortality