Proposed core set of outcome measures in patients with primary Sjögren's syndrome: 5 year follow up.
Objective. To clarify the spontaneous course of important disease manifestations (a core set of outcome measures) over a period of 5 years in patients with primary Sjögren's syndrome (SS), and to analyze predictors of unfavorable outcome. To test the usefulness of the recently proposed core set of outcome measures. Methods. A cohort of patients with primary SS according to the American-European c