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Table 1 Characteristics of patients with or without ventilator-associated pneumonia (VAP) within 9 days of ICU admission in University of Lyon hospitals (France), January 2001-December 2009

From: Early-onset ventilator-associated pneumonia incidence in intensive care units: a surveillance-based study

Characteristics VAP within 9 days (n = 367) No VAP within 9 days (n = 3,020) p-value
Categorical variable, n (%)    
   Year of admission    < 0.001
2001-2003 95 (25.9) 1,202 (39.8)  
2004-2006 116 (31.6) 937 (31.0)  
2007-2009 156 (42.5) 881 (29.2)  
   Gender, female 109 (29.7) 1,165 (38.6) 0.001
   Neutrophil count < 500/mm3 23 (6.3) 189 (6.3) 1.0
   Trauma 160 (43.6) 754 (25.0) < 0.001
   Diagnosis category    < 0.001
Medical 152 (41.5) 1,844 (61.1)  
Surgical 214 (58.5) 1,176 (38.9)  
   Deceased in-hospital 75 (20.5) 656 (21.8) 0.6
Continuous variable, median (interquartile range)    
   Age, years 51 (36-66) 55 (40-69) 0.002
   Simplified Acute Physiology Score 47 (36-56) 44 (32-56) 0.011
   Length of hospital stay, days 21 (12-33) 5 (3-12) < 0.001
   Length of intubation, days 15 (9-25) 2 (1-8) < 0.001