Demographic and clinical data of 41 patients with primary SS
| Age (y) | 50 (20–80) |
|---|---|
| Sex (% women) | 98 |
| Disease duration (y) | 8 (1–30) |
| ESR (mm 1st h) | 39 (11–110) |
| ANA (% positive) | 67 |
| RF (% positive) | 53 |
| SS-A (% positive) | 64 |
| Schirmer test (mm/5min) | 8.7 (0–35) |
| Saxon (mg/2min) | 1.5 (0–20.7) |
| Sialography (% positive) | 80 |
| Salivary gland biopsy (% positive)* | 89 |
All values are presented as mean and range unless indicated otherwise. ESR = erythrocyte sedimentation rate. ANA = anti-nuclear antibodies. RF = rheumatoid factor. SS-A = Sjögren's syndrome A antibodies. *Lymphocytic infiltration in salivary gland biopsy (⩾2 foci of >50 lymphocytes/4 mm2 gland tissue).