First signs and symptoms of spondyloarthritis--data from an inception cohort with a disease course of two years or less (REGISPONSER-Early)

OBJECTIVE: To determine the first signs and symptoms, and the clinical, biological and radiological characteristics of patients with early SpA. METHODS: A total of 150 SpA patients were selected from 2367 listed in REGISPONSER (Registro Español de Espondiloartritis de la Sociedad Española de Reumatología). The inclusion criterion was a disease course of