title: The precision of the conjunctival provocation test.
abstract: Repeated conjunctival provocation tests (CPT) were done in 20 children with rhino-conjunctivitis due to birch pollen allergy. Compared with the first open challenge, three successive blinded CPTs were reproducible within an allergen strength difference of one 10-potency in 92% of the tests. Based on the data, a power function was constructed, making it possible to determine the number of patients needed to discriminate CPT sensitivity of a given magnitude between two populations. During the study period specific serum-IgE increased in only three of 19 patients, indicating that stimulation of IgE antibody production is not a common consequence of repeated tests. We conclude that CPT is useful in clinical research. When indicated in clinical routine, CPT is a safe and easy test with good precision.
mesh_terms: D000293:Adolescent; D000485:Allergens / Q000008:administration & dosage; D002648:Child; D003229:Conjunctival Diseases / Q000276:immunology*; D005260:Female; D006801:Humans; D006967:Hypersensitivity / Q000175:diagnosis*; D008297:Male; D011058:Pollen / Q000276:immunology
chemical_list: D000485:Allergens