Prevalence of fibromyalgia and associated factors in Spain.

Objectives: The prevalence of fibromyalgia (FM) differs depending on the population studied. The main objective of the EPISER2016 study was to estimate the prevalence of FM in adults in Spain. The secondary objective was to evaluate the association with sociodemographic and anthropometric characteristics and smoking.

Prevalence of rheumatic diseases in adult population in Spain (EPISER 2016 study): Aims and methodology.

Aims: To describe the methodology of the EPISER 2016 (study of the prevalence of rheumatic diseases in adult population in Spain), as well its strengths and limitations. The aim of this study is to estimate the prevalence of rheumatoid arthritis (RA), psoriatic arthritis (PsA), ankylosing spondylitis (AS), systemic lupus erythematosus (SLE), Sjögren's syndrome (SS), osteoarthritis (knee, hip, hands, and cervical and lumbar spine), fibromyalgia, gout and clinical osteoporotic fracture.

Material And Method: Population-based, multicenter, cross-sectional study, with the participation of 45 municipalities in the 17 Spanish autonomous communities.

Efficacy of rituximab in dermatomyositis and polymyositis refractory to conventional therapy.

We report one case of dermatomyositis and one of polymyositis refractory to several conventional inmunosupressive therapies, which present a response after treatment with rituximab, enabling steroid dose reduction and a prolonged remission.