Incidence of Dermatomyositis and Clinically Amyopathic Dermatomyositis

Objectives

To identify new and existing cases of dermatomyositis and its subtypes in Olmsted County, Minnesota, from 1976 through 2007, and to establish a population-based estimate of the incidence and prevalence of dermatomyositis and amyopathic dermatomyositis.

Design

Retrospective population-based study.

Setting

Community-based epidemiology project.

Patients

Patients with a diagnosis of dermatomyositis were...