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Table 4 Risk factors for VAP in patients undergoing major heart surgery in Europe and a multivariate analysis

From: Ventilator-associated pneumonia in patients undergoing major heart surgery: an incidence study in Europe

Characteristic Odds ratio 95% confidence interval Pvalue
Ascending aortic surgery 6.22 1.69 to 22.89 0.006
Number of blood units transfused (per unit transfused) 1.08 1.04 to 1.13 < 0.001
Need for re-intervention 6.65 2.10 to 21.01 0.001