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Table 3 Multivariate analysis of factors associated with Pseudomonas aeruginosa acquisition during ICU staya

From: Acquisition of Pseudomonas aeruginosa and its resistance phenotypes in critically ill medical patients: role of colonization pressure and antibiotic exposure

Variables

OR (95% CI)

P -value

Shock

2.1 (1.2 to 3.7)

0.01

Colonization pressure >0.43

4 (1.2 to 12.8)

0.02

Intubation

  

 No

Reference group

 

 1 to 3 days

2.5 (1.2 to 5)

0.01

 >3 days

3.6 (1.7 to 7.5)

0.001

Enteral nutrition

  

 No

Reference group

 

 1 to 3 days

3.6 (1.8 to 7.6)

0.001

 >3 days

1 (0.5 to 2.1)

1

Tracheostomy

4.4 (2.3 to 8.3)

<0.001

Parenteral nutrition

  

 No

Reference group

 

 1 to 3 days

3.9 (1.6 to 9.6)

0.003

 >3 days

1.1 (0.6 to 2.2)

0.7

Prior exposure to fluoroquinolones

  

 No

Reference group

 

 1 to 3 days

0.5 (0.2 to 1.2)

0.2

 >3 days

0.4 (0.2 to 0.8)

0.01

  1. aCI, Confidence interval; ICU, Intensive care unit; OR, Odds ratio. Hosmer-Lemeshow goodness-of-fit test value of 9.7 (P =0.2).