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Table 2 Patient characteristics during the ICU stay

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

  VAP P
Yes No  
n = 141 n = 362
Stress ulcer prophylaxis    0.002
 Proton-pump inhibitor 122 (86) 279 (77)  
 Sucralfate 9 (6) 46 (13)  
 No 10 (7) 40 (11)  
Tracheostomy 24 (17) 47 (13) 0.243
Red blood cell transfusion 86 (61) 139 (38) <0.001a
Sedation 122 (86) 284 (78) 0.039b
Neuromuscular-blocking agent use 10 (7) 20 (6) 0.505
Mean number of ABG per day 3 (1–6) 2 (1–5) 0.261
Number of days with PaO2 > 120 mmHg 5 (2–7) 3 (1–5) <0.001
Percentage of days with PaO2 > 120 mmHg 0.33 (0.19–0.58) 0.33 (0.14–0.50) 0.282
Duration of MV prior to VAP, days 14 (8–23) 9 (5–17) <0.001
Total duration of MV, days 30 (17–43) 9 (5–17) <0.001
Length of ICU stay, days 34 (19–45.5) 12 (7–21) <0.001
ICU mortality 73 (52) 130 (35) 0.001c
  1. The results are expressed in number (%) for categorical variables and in median (IQR) for quantitative variables. Exposure to potential risk factors for VAP was taken into account until VAP occurrence, or until ICU discharge in patients with and without VAP, respectively. aOR = 2.5 (1.7, 3.7); bOR = 1.8 (1.02, 3.0); cOR = 1.9 (1.3, 2.8)
  2. VAP ventilator-associated pneumonia, CI confidence interval, ICU intensive care unit, OR odds ratio, ABG arterial blood gas, PaO 2 arterial oxygen tension, MV mechanical ventilation