2-Item Screening Tool of Lai et al for Dengue Fever in Children (DF-2)

 

Patient selection: child <= 16 years of age in southern Taiwan

 

Parameters:

(1) white blood cell count

(2) platelet count

Parameter	Finding	Points
white blood cell count	< 3,000 per µL	2
	3,000 to 5,000 per µL	1
	> 5,000 per µL	0
platelet count	< 100,000 per µL	2
	100,000 to 150,000 per µL	1
	> 150,000 per µL	0

 

total score =

= SUM(points for both parameters)

 

Interpretation:

• minimum score: 0

• maximum score: 4

• The higher the score the greater the risk for Dengue Fever.

• A score >= 2 was considered a positive screen for Dengue Fever.

• If the screening test is positive then serologic testing should be performed.

 

Performance:

• This would depend on the prevalence of Dengue Fever in the community.