Risk Factors of Harris et al for Patient Colonization with an Extended Spectrum Beta-Lactamase Producing Bacteria on ICU Admission

 

Parameters:

(1) age of the patient in years

(2) recent history of in-hospital therapy with vancomycin

(3) recent history of in-hospital therapy with piperacillin-tazobactam

(4) infectious disease specific chronic disease score (CDS)

 

Parameter	Finding	Points
age of the patient	<= 60 years	0
	> 60 years	1
therapy with vancomycin	no	0
	yes	1
therapy with piperacillin-tazobactam	no	0
	yes	1
infectious disease specific chronic disease score	low	0
	high	1

 

where:

• There was considerable overlap in the infectious disease specific chronic disease score between colonized and noncolonized groups, with distinction seen only with higher scores.

• The hazard ratios for the different risk factors range from 1 to 2.

 

total score =

= SUM(points for all 4 parameters)

 

Interpretation:

• minimum score: 0

• maximum score: 4

• The higher the score the more likely the patient will be colonized on ICU admission.