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Table 1 Characteristics of the study population

From: Salivary gland ultrasonography: a highly specific tool for the early diagnosis of primary Sjögren’s syndrome

Characteristics Primary Sjögren’s syndrome (n = 50) No Sjögren’s syndrome (n = 57) P value
Age, years, mean (SD) 47 (13) 53 (12) 0.006
Symptom duration, mean (SD) 2.3 (1.8) 2.1(1.7) ns
Female sex, number (%) 48 (96 %) 55 (97 %) ns
Xerophtalmia, number (%) 44 (88 %) 47 (83 %) ns
Xerostomia, number (%) 46 (92 %) 49 (86 %) ns
Abnormal ocular tests, number (%) 37 (74 %) 32 (56 %) ns
USFR, ml/15 minutes, mean (SD) 2.3 (2.6) 4.8 (3.4) <0.0001
Focus score, mean (SD) 3.0 (2.3) 0(0) <0.0001
Hypergammaglobulinemia, number (%) 27 (54 %) 3 (5 %) <0.0001
Rheumatoid factor, number (%) 26 (52 %) 4 (7 %) <0.0001
Anti-Ro/SSA, number (%) 30 (60 %) 1 (2 %) <0.0001
Anti-La/SSB, number (%) 17 (34 %) none <0.0001
  1. USFR unstimulated salivary flow rate