Changes in Chinese patch testing practices over 13 years: Updated cross‐sectional survey and possible international implications

Abstract

Background Patch testing, the standard method for diagnosing allergic contact dermatitis, has been utilized for ~30 years in China. A 2006 survey found that patch testing was widespread among Chinese dermatologists, but the practice and perceptions were unsatisfactory. Objective To evaluate the current situation of patch testing practice and perception, we re‐surveyed Chinese dermatologists. Methods A cross‐sectional survey of Chinese dermatologists was conducted by electronic questionnaires at the 15^th National Congress of Dermatology in November 2019. Results There were 2199 valid questionnaires collected. Seventy‐five per cent of dermatologists performed patch testing; the majority (59.2%) utilized the baseline (standard) allergen series made in China; more used TRUE Test or the Chemotechnique Diagnostics series, compared with 2006. Most (92.8%) performed only one single reading, more than 2006. About two‐thirds offered patient education post patch testing, but only 27% were executed by trained dermatologists. Dermatologists from regional hospitals more likely performed patch testing and had better perception of patch testing. The majority (88.1%) had received patch testing training, which however did not significantly improve dermatologists’ perception. Conclusions There was insignificant improvement in practice and perception of dermatologists compared with 2006. Further education and studies should be conducted. Similar surveys in other countries would be of interest.