Könönen M, Torppa J, Lassus A
Acta Derm Venereol Suppl (Stockh). 1986;124:1-10.
A questionnaire survey of all members of the Psoriasis Society of the Greater Helsinki area was carried out during March and April 1984 in order to determine the course of psoriasis. 1517 (85.4%) of the members responded; 1050 of them had psoriasis with skin symptoms only (psoriasis; P) and 400 had also joint symptoms (psoriatic arthritis; PA). In two thirds, the psoriasis had started before the age of 30 years. Skin lesions were more frequent in the PA-group than in the P-group, and more severe in men than in women in both groups. Of the 400 with PA, about 70% had moderate to very severe discomfort in their joints. Most of the patients had experienced their first joint symptoms at the age of 20 to 49 years. In the majority of the patients with PA the skin symptoms begun before the joint symptoms; in 7% the joint symptoms had preceded the skin symptoms; and in 10% both symptoms had begun simultaneously.
1984年3月至4月间，对大赫尔辛基地区银屑病协会的所有成员进行了问卷调查，以确定银屑病的病程。1517名成员（85.4%）做出了回应；其中1050人仅有皮肤症状的银屑病（银屑病；P），400人还有关节症状（银屑病关节炎；PA）。三分之二的患者银屑病发病年龄在30岁之前。PA组的皮肤损害比P组更常见，且两组中男性的皮肤损害比女性更严重。在400名PA患者中，约70%的人关节有中度至非常严重的不适。大多数患者在20至49岁时首次出现关节症状。在大多数PA患者中，皮肤症状先于关节症状出现；7%的患者关节症状先于皮肤症状；10%的患者两种症状同时出现。
