Characteristics of Patients with Primary Sjögren's Syndrome and Non-specific Chronic Sialadenitis: A Subtype in Elderly Patients.

The pSS patients with NSCS were older than corresponding non-NSCS pSS individuals, but they had similar clinical features. NSCS is associated with age and seldom occurred below the age of 45 years, regardless of the presence or absence of pSS. NSCS may be a subtype of pSS in elderly patients.