Table 1.
Characteristics of pSS patients and the control subjects.
| pSS (n = 41) |
Control (n = 29) |
|
|---|---|---|
| Age (years) | 36.42 ± 18.71 | 34.53 ± 21.47 |
| Sex (female/male) | 39/2 | 28/1 |
| Disease duration (months) | 36.33 ± 42.25 | — |
| Arthritis (%) | 6 (14.63) | — |
| Fever (%) | 8 (19.51) | — |
| Anemia (%) | 12 (29.27) | — |
| Leukopenia (%) | 20 (48.78) | — |
| Thrombocytopenia (%) | 4 (9.76) | — |
| Renal disease (%) | 7 (17.07) | — |
| Pulmonary interstitial changes (%) | 5 (12.20) | — |
| Autoimmune liver disfunction (%) | 4 (9.76) | — |
| ANA positive (%) | 36 (87.80) | — |
| A—SSA positive (%) | 34 (82.93) | — |
| A—SSB positive (%) | 19 (46.34) | — |
| ESR (mm/H) | 56.75 ± 39.38 | — |
| CRP (mg/L) | 4.86 ± 3.21 | — |
| IgG (g/L) | 24.76 ± 8.12 | — |
| IgM (g/L) | 1.97 ± 1.87 | — |
| IgA (g/L) | 3.76 ± 1.51 | — |
| RF (IU/L) | 67.79 ± 32.47 | — |
| Focus index (1–3) | 1.56 ± 0.77 | — |
pSS: primary Sjögren's syndrome; ANA: antinuclear antibody; A-SSA: anti-Ro/SSA antibody; A-SSB: anti-La/SSB antibody; ESR: erythrocyte sedimentation rate; CRP: C-reactive protein; IgG: immunoglobulin G; IgM: immunoglobulin M; IgA: immunoglobulin A; RF: rheumatoid factor; Focus index: the number of foci per 4 mm2 of tissue.
Values are expressed as mean ± standard deviation.