紫外线最强的高海拔地区对银屑病的影响初步分析

A PRIMARY STUDY TO PSORIASIS AFFECTED BY HIGH ALTITUDE AREA WITH INTENSIVE UV RAY

本文初步探讨了我国各地区由于海拔、纬度、季节和环境等因素导致阳光辐射至地表的紫外线强度改变的规律及其对银屑病发病的影响。长期居住于高海拔地区的藏族,银屑病住院率明显低于居住于低海拔地区的其他民族。我国南方低纬度地区发病率高于北方高纬度地区。多数银屑病患者的病情夏季缓解,冬季加重,因夏季紫外线强度为冬季的1.92倍。农村大气层较城市洁净,紫外线强度高于城市,银屑病发病率显著低于城市。

In this paper, a primary study of UV ray intensity in different areas of our country showed us that the pathogenic basis of psoriasis could be affected by different altitude, latitude, season and environment. For Tibetan residents lived in high altitude area, the in patient number of psoriasis is obviously less than that of other nationalities lived in lower altitude area. Because the different latitude, the sick rate of the disease in south China is obviously lower than in north China. The reason that the condition of most psoriasis patients remits in summers but exacerbates in winters is due to that UV ray intensity in summers is 1.92 time greater than in winters. In countryside, the atomsphere is cleaner and UV ray is greater than in cities, so the sick rate of psoriasis is lower in countryside.