Table 4

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

Characteristic

Odds ratio

95% confidence interval

P value

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

Hortal et al. Critical Care 2009 13:R80   doi:10.1186/cc7896