Validation of the Use of Dried Blood Spot (DBS) Method to Assess Vitamin A Status

Elham Fallah & Seyed Hadi Peighambardoust
Background: Vitamin A deficiency is an important dietary deficiency in the world. Thus, the ne¬cessity of screening for deficient populations is obvious. This paper introduces a fast, cheap and relatively reliable method called �dried blood spot� (DBS) method in screening the deficient populations. The validity of this method for retinol measurement was investigated. Method: The �precision� and �agreement� criteria of the DBS method were assessed. The preci¬sion was calculated and compared with those of plasma...