Negative HCV-IgG | Positive HCV-IgG | Bilateral P value | |
---|---|---|---|
N = 678 | N = 105 | ||
Mean age, years | 56.36 ± 14.83 | 62.93 ± 11.86 | <0.001* |
Sex, male | 45 (7 %) | 17 (16 %) | 0.003 |
Dry mouth | 661 (98 %) | 103 (98 %) | 1 |
Dry eye | 661 (98 %) | 104 (99 %) | 0.493 |
Altered ocular tests | 559/609 (92 %) | 82/88 (93 %) | 0.834 |
Altered parotid scintigraphy | 486/554 (88 %) | 45/54 (83 %) | 0.389 |
Positive salivary gland biopsy | 198/309 (64 %) | 21/30 (70 %) | 0.556 |
Criteria SS | |||
- 1993 only | 230 (34 %) | 54 (51 %) | <0.001 |
- 2002 | 432 (64 %) | 38 (26 %) | |
- ACR only | 16 (2 %) | 13 (12 %) | |
Antinuclear antibody+ | 568/676 (84 %) | 79/104 (76 %) | 0.05 |
Rheumatoid factor+ | 267/663 (40 %) | 57/102 (56 %) | 0.004 |
Anti-Ro/SS-A+ | 292/676 (43 %) | 16/103 (15 %) | <0.001* |
Anti-La/SS-B+ | 200/676 (30 %) | 17/103 (17 %) | 0.006 |
Monoclonal gammopathy | 85/492 (17 %) | 35/75 (47 %) | <0.001 |
Type of monoclonal band | |||
- mIgA | 9 (11 %) | 1 (3 %) | 0.047 |
- mIgG | 47 (55 %) | 13 (37 %) | |
- mIgM | 18 (21 %) | 15 (43 %) | |
- Free chains | 11 (13 %) | 6 (17 %) | |
Type of monoclonal light chain | |||
- Kappa:lambda | 50:35 | 19:16 | 0.65 |
Cryoglobulin+ | 41/626 (7 %) | 63/104 (61 %) | <0.001* |
Low C3 levels, <0.82 g/l | 70/660 (11 %) | 37/103 (36 %) | <0.001* |
Low C4 levels, <0.11 g/l | 45/660 (7 %) | 49/103 (48 %) | <0.001* |
Hematological neoplasia | 26 (4 %) | 9 (9 %) | 0.04* |
Neoplasia | 54 (8 %) | 21 (20 %) | <0.001* |
Death | 52 (8 %) | 35 (33 %) | <0.001 |