Reproducibility of patch tests

Rainer Gollhausen, Bernhard Przybilla, Johannes Ring

Research output: Contribution to journalArticlepeer-review

87 Scopus citations


Patch tests with a series of 39 substances were performed in 41 patients on one side of the upper aspect of the back. Testing was repeated on the contralateral side of the back 1 week later (sequential testing). In 35 other patients, duplicate patch test series were simultaneously applied on both sides of the back (concomitant testing). If a positive reaction to a test substance was obtained at only one side of the back, the result was regarded as nonreproducible. Of all positive reactions, 40.0% were nonreproducible at sequential testing and 43.8% were nonreproducible at concomitant testing. Weakly positive reactions were far more often non-reproducible than stronger reactions.

Original languageEnglish
Pages (from-to)1196-1202
Number of pages7
JournalJournal of the American Academy of Dermatology
Issue number6
StatePublished - 1989
Externally publishedYes


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