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Table 1 Characteristics of study patients at ICU admission

From: Hyperoxemia as a risk factor for ventilator-associated pneumonia

  VAP P
  Yes No  
n = 141 n = 362
Age, years 62 (51.5–74) 57 (46–71) 0.004
Male gender 102 (72) 246 (67) 0.339
SAPS II 53 (41–65) 45 (33–59) <0.001
LOD score 6 (3–9) 5 (2–7) 0.241
McCabe score >2 20 (14) 37 (10) 0.382
Transfer from other wards 96 (68) 216 (60) 0.081
Chronic diseases    
 Diabetes 16 (11) 62 (17) 0.108
 COPD 41 (29) 98 (27) 0.651
 Cardiac failure 34 (24) 67 (18) 0.159
 Cirrhosis 4 (3) 14 (4) 0.576
 Chronic dialysis 2 (1) 10 (3) 0.375
 Immunosuppression 38 (27) 78 (22) 0.196
Admission category    0.499
 Medical 91 (65) 245 (67)  
 Surgical 48 (34) 114 (31)  
Cause for ICU admission    
 Acute exacerbation of COPD 16 (11) 46 (12) 0.677
 ARDS 22 (15) 38 (10) 0.113
 Pneumonia 40 (28) 91 (25) 0.458
 Congestive heart failure 5 (3) 9 (2) 0.516
 Neurologic failure 16 (11) 50 (13) 0.462
 Poisoning 16 (11) 30 (8) 0.285
 Shock 64 (45) 111 (30) 0.002a
 Cellulitis 10 (7) 48 (13) 0.052
 Infection 97 (69) 246 (67) 0.856
Prior antimicrobial treatment 70 (50) 178 (49) 0.924
PaO2 > 120 mmHg 95 (67) 193 (53) 0.004b
  1. aOR = 1.9, 95 % CI (1.3, 2.8); bOR = 1.8, 95 % CI (1.2, 2.7). The results are expressed in number (%) for categorical variables and in median (IQR) for quantitative variables. ARDS acute respiratory distress syndrome, COPD, chronic obstructive pulmonary disease, CI confidence interval, ICU intensive care unit, LOD logistic organ dysfunction, MV mechanical ventilation, OR odds ratio, PaO 2 arterial oxygen tension, SAPS simplified acute physiology score, VAP ventilated-associated pneumonia