Patients with Negative Patch Tests: Retrospective Analysis of North American Contact Dermatitis Group (NACDG) Data 2001-2016

•We characterized patients with negative patch tests; this population has not been studied. Patients with negative patch tests have distinct characteristics. They are more likely to be male and have irritant dermatitis, and less likely to have occupationally related skin disease when compared to patients with positive patch tests.

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