VAP patients stratified by age.

ARDS: Acute respiratory distress syndrome; ICU: intensive care unit; IQR: interquartile range; LOS: length of stay; MRSA: Methicillin-resistant Staphylococcus aureus; MV: mechanical ventilation; SAPS II: simplified acute physiology score II; VAP: ventilator associated pneumonia. *Results shown are percentages of the 167 patients for whom a microbiological diagnosis of VAP was successful. **Results shown are percentages of the 147 patients for whom data on antimicrobial sensitivities were available.