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. 2012 Sep-Oct;22(5):663-7.
doi: 10.1684/ejd.2012.1802.

Prevalence of psoriasis in China: a population-based study in six cities

Xiaolan Ding  1 , Tinglin Wang, Yiwei Shen, Xiaoyan Wang, Cheng Zhou, Shan Tian, Ying Liu, Guanghui Peng, June Zhou, Shuqi Xue, Renli Wang, Ying Tang, Xuemei Meng, Guangde Pei, Yunhua Bai, Qing Liu, Hang Li, Jianzhong Zhang
Affiliations

Prevalence of psoriasis in China: a population-based study in six cities

Xiaolan Ding et al. Eur J Dermatol. 2012 Sep-Oct.

Abstract

Background: Although psoriasis occurs worldwide, the prevalence varies considerably between different peoples and regions. In China, a questionnaire-based study was carried out in 1987 and the prevalence of psoriasis was found to be 0.12%. Since then, no large-scale, population-based study has been reported.

Objectives: To obtain the accurate figures for the prevalence of psoriasis in China.

Methods: A population-based survey was conducted in 6 cities. The cluster sampling method was used to select communities in each city. The subjects were required to fill out self-reporting questionnaires during a face-to-face interview and also received physical examination by dermatologists.

Results: 19,974 subjects were visited and 17,345 completed the questionnaires and received dermatological examination. 102 subjects (0.59%) were found to have psoriasis. After standardization, the prevalence of psoriasis was 0.47%. The prevalence of psoriasis in males and females was 0.54% and 0.44% respectively. 97.06% of the patients had psoriasis vulgaris. 28.43% of the patients reported a family history of psoriasis. 59.80% of patients experienced a negative influence on the quality of life.

Conclusions: This population-based and dermatologist-confirmed study showed that the prevalence of psoriasis in China is 0.47%, which is higher than that reported in 1987.

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