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Scoring Algorithm of Chen et al for Predicting Vascular Infection in an Adult with Nontyphoidal Salmonella Bacteremia

Description

Chen et al developed a simple score for identifying an adult with nontyphoid Salmonella bacteremia who may have a vascular invasion. These can help to identify a patient who may benefit from more aggressive management. The authors are from National Cheng Kung University Hospital, Chi Mei Medical Center and Chia Nan University of Pharmacy and Science in Taiwan.


 

Patient selection: bacteremia with Salmonella species other than typhi

 

Outcome: vascular infection

 

Parameters:

(1) hypertension

(2) gender

(3) serogroup C1 nontyphoid Salmonella

(4) coronary artery disease

(5) malignancy

(6) immunosuppressive therapy

Parameter

Finding

Points

hypertension

No

0

 

Yes

1

gender

Female

0

 

Male

1

serogroup C1

No

0

 

Yes

1

coronary artery disease

No

0

 

Yes

1

malignancy

No

0

 

Yes

-1

immunosuppressive therapy

No

0

 

yes

-1

 

total score =

= SUM(points for all 6 parameters)

 

Interpretation:

• minimum score: -2

• maximum score: 4

• The higher the score the greater the risk of vascular infection.

 

Total Score

Prevalence Vascular Infection

<= 0

2.2%

1

10.6%

2

39.4%

3

55.2%

4

100%

 

Performance:

• The area under the ROC curve is 0.83.

• A cutoff of +1 has a sensitivity of 95% and specificity of 45%.

 


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