中文摘要：

目的探讨寻常性银屑病的临床流行病学特征。方法采用统一设计的临床流行病学调查问卷，应用EpiData3．1和SPSS13．0程序软件进行数据处理与分析。结果531例寻常性银屑病患者中男女比例为1．31：1；患者的平均首次发病年龄为（25．7±13．1）岁；皮损表现以点滴状银屑病居多（49．5％），发病部位以下肢为首；有家族史者发病年龄早于无家族史者（P〈0．05）；病情加重季节主要为春季和冬季。结论寻常性银屑病的发生无性别差异，环境与遗传因素在寻常性银屑病的发生、发展中起重要作用。

英文摘要：

Objective To describe the clinical and epidemiological characteristics of psoriasis vulgaris in Liaoning region. Methods Five hundred and thirty-one outpatients with psoriasis vulgaris were surveyed by using a consensusly-designed questionnaire. EpiData3.1 and SPSS13.0 statistical softwares were used for data analysis. Results In the 531 patients with psoriasis vulgaris, the male to female ratio was 1.31 ： 1, and the average age at the first onset was 25.7± 13.1 years. Guttate lesions were the commonest clinical manifestation, and observed in 49.5% of these patients. Lower limbs seemed to be the predilection site. The age at onset was younger in patients with family history than in those without （22.5 - 12.6 years vs. 26.9 ± 13.2 years, t=3.437, P〈 0.05）. The exacerbation of psoriasis vulgaris often occurred in winter or spring. Conclusions There seems no gender difference in the development of psoriasis vulgaris, environmental and genetic factors appear to play an important role in the initiation and development of psoriasis vulgaris.