Early disease course and predictors of disability in juvenile rheumatoid arthritis and juvenile spondyloarthropathy: a 3 year prospective study.

Abstract

Health status and disease activity improved over time in patients under medical treatment. The patients with JAS/SEA and RF positive polyarthritis had poorer health than the patients in other subtypes. A high disability index and a poor well-being at baseline predicted reduced physical function after 3 years.