Is early-onset primary Sjögren's syndrome a worse prognosis form of the disease?

The article discusses research which examined prognosis, phenotypes, and outcomes associated with early-onset primary Sjögren's syndrome (pSS). Topics explored include the clinical manifestations and characteristics of pSS, the comparison of clinical and biological phenotypes in two groups of patients with pSS, and the European League Against Rheumatism (EULAR) Sjögren's syndrome disease activity index (ESSDAI) scores recorded.