Monday, February 21, 2011

Quantitative evaluation of patch test reactions: a comparison between visual grading and erythema index image analysis


Background/aims: The interpretation of patch test reactions may vary between examiners. As test results are graded, an issue also arises when differing degrees of erythema are placed in the same grade. The purpose of this study was to quantitatively evaluate the degree of erythema in patch tests using image analysis and to study the usefulness of this method by comparing it with visual grading.


Methods: A total of 121 Japanese patients were patch tested with various materials. At 48 h, digital photographs of the patch test areas were taken, in ...

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