[Specificity and sensitivity of the 4-N-acetyl-L-tyrosyl-p- aminobenzoic acid test in childhood with serum p-aminobenzoic acid determination].

Specificity and sensitivity of ALTAB test have been estimated in 40 healthy children and 13 cystic fibrosis patients. The test has been carried out in the modification as 2-hour-serum PABA-test. The found specificity was 90%, the sensitivity 100% respectively. Therefore this test is suitable for evaluation of exocrine pancreas function.