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Table 1 Clinical characteristics and laboratory findings of patients with primary Sjögren's syndrome and healthy controls

From: Increased serum levels of macrophage migration inhibitory factor in patients with primary Sjögren's syndrome

Parameter pSS Controls
Characteristics   
    n 76 28
   Sex (male, female) 3, 73 6, 22
   Agea (years) 49.2 ± 13.8 51 ± 11.4
   Disease durationa (years) 7.2 ± 4.1 -
Clinical findings   
   Conjunctivitis 26 (34) None
   Parotid swelling 22 (28) None
   Arthralgia 51 (67) None
   Myalgia 17 (22) None
   Raynaud's phenomenon 20 (26) None
   Peripheral neuropathy 11 (14) None
   Generalized tendomyopathy 9 (12) None
   Skin involvement 9 (12) None
   Pulmonary involvement 12 (16) None
   Renal involvement 10 (13) None
   Thyroiditis 12 (16) None
   Lymphoma 3 (4) None
Laboratory findings   
   Antinuclear antibodies 76 (100) Negative
   RF (Waaler–Rose test) 60 (79) Negative
   Anti-Ro/SS-A antibodies 69 (91) Negative
   Anti-La/SS-B antibodies 47 (62) Negative
   Hypergammaglobulinemia 57 (75) Negative
   Leukocytopenia 29 (38) Negative
   Anemia 9 (13) Negative
Thrombopenia 4 (5) Negative
Low complement C3c 20 (26) Negative
Low complement C4 12 (16) Negative
  1. Numbers in parentheses are percentages of the total. pSS, primary Sjögren's syndrome; RF, rheumatoid factor; SS, Sjögren's syndrome. aMean ± SD.