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The article presents a study that determines the prevalence of contact sensitization to textile dyes in a non-patient population and in eczema patients patch tested in a tertiary hospital in Beijing, China. The study shows lower total positivity rate for patch testing with the baseline series of allergens in volunteers than that for patients. It found no significant difference in the prevalence of contact sensitization to any allergens between volunters and patients.

The article presents a study to find the pervasiveness of contact sensitization in university students in Beijing and to find the link in the prevalence of delayed hypersensitivity between eczema patients and a non-patient population. Volunteers from Peking University were recruited by stating that healthy volunteers were needed to test for the frequency of allergic reactions to common environmental allergens. Two hundred and five volunteers were patch tested.