Standard patch test results in 3,225 consecutive Danish patient from 1973 to 1977

From 1973 to 1977 a total of 3,225 patients were patch tested at the Department of Dermatology, Odense University Hospital, Denmark; 1,038 patients reacted to one or more allergens. The data on frequency of the most common allergens are presented. The most common allergens observed were nickel, dichromate, balsam of Peru, wood tar, carba mix and wool alcohols.