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.