National rates and regional differences in sensitization to allergens of the standard series. Population-adjusted frequencies of sensitization (PAFS) in 40,000 patients from a multicenter study (IVDK).

Sensitization rates to contact allergens vary between centers and are influenced by sex and age. Eliminating the latter 2 factors by standardization of data by age and sex, the present analysis addresses possible differences between centers remaining after elimination of these confounders, and analyzes other factors which might influence rates, e.g.

[Copper allergy--a rare form of sensitization].

It is reported on a 41 years old man who suffered from dermatitis by contact with technical carbon and graphite products. In patch testing we found positive reactions to colophony, metallic copper and copper sulfate. By avoidance, of noxae the patient was free of symptoms.