Clinical accuracy of updated version of the Phadebas RAST test.

The clinical sensitivity and specificity of an updated version of the Phadebas RAST test were superior to that of the conventional Phadebas system. In comparison to a three-hour first incubation, an overnight first stage incubation did not contribute to an improvement in the over-all clinical effectiveness of the test system. However, the prolonged first stage incubation did contribute to a better resolution between the normal, non-atopic control group and the atopic patient population.