Bedi T R
Dermatologica. 1977;155(5):310-4. doi: 10.1159/000250983.
Analysis of 162 psoriasis patients revealed a distinct male preponderance with a sex ratio of 2.5:1. The mean age of males (31.44) was 6 years higher than that of females (25.73). More than half the patients were in their 3rd to 4th decade and the mean age of onset was lower among the females than the males by approximately 5 years. Two-thirds had onset before the age of 30 years. Familial occurrence was recorded in 13.6% of the cases. Itching appeared to be a prominent feature and only a fourth of the total patients showed traditionally quoted worsening in colder months. The scalp and the extremities were the commonest sites of involvement and a large majority (74%) showed nail changes of one type or another. Psoriatic arthropathy and especially mutilating arthritis were rare.
对162例银屑病患者的分析显示，男性明显居多，性别比为2.5:1。男性的平均年龄（31.44岁）比女性（25.73岁）高6岁。超过一半的患者年龄在30至40岁之间，女性的平均发病年龄比男性低约5岁。三分之二的患者在30岁之前发病。13.6%的病例有家族发病记录。瘙痒似乎是一个突出特征，只有四分之一的患者表现出传统上所说的在较冷月份病情加重。头皮和四肢是最常受累的部位，绝大多数（74%）患者出现了某种类型的指甲改变。银屑病关节炎，尤其是致残性关节炎很少见。
