Patient and control populations used for the ROC curve analysis
| Diagnosis | No of patients | Mean (SD) age (years) | Sex (M/F) |
|---|---|---|---|
| SS, Sjögren's syndrome; CTD without SS, connective tissue diseases without secondary SS; controls (no SS), patients with sicca complaints but without SS. | |||
| Primary SS | 76 | 58.1 (14.9) | 2/74 |
| CTD without SS | 41 | 46.5 (14.7) | 1/40 |
| Controls (no SS) | 63 | 50.4 (14.6) | 8/55 |