Table 3.
Biological characteristics of SS patients with or without SLE-associated autoantibodies.
| Biological characteristics | All SS patients (n = 87) |
SS patients with SLE-associated autoantibodies (n = 13) |
SS patients without SLE-associated autoantibodies (n = 74) |
P value |
|---|---|---|---|---|
| ANA positivity | 0.340 | |||
| ≤ 1:100 ANA (n, %) | 11,(12.64%) | 1,(7.69%) | 10,(13.51%) | |
| 1:320 ANA (n, %) | 12,(13.79%) | 1,(7.69%) | 11,(14.86%) | |
| 1:1000 ANA (n, %) | 45,(51.72%) | 5,(38.46%) | 40,(54.05%) | |
| ≥ 1:3200 ANA (n, %) | 19,(21.84%) | 6,(46.15%) | 13,(17.58%) | |
| Anti-ENA Abs positivity | ||||
| anti-SSA (n, %) | 64,(73.56%) | 11,(84.62%) | 53,(71.62%) | 0.330 |
| anti-SSB (n, %) | 29,(33.33%) | 4,(30.77%) | 25,(33.78%) | 0.833 |
| anti-nRNP/Sm (n, %) | 7,(8.05%) | 4,(30.77%) | 3,(4.05%) | 0.001*** |
| anti-Sm (n, %) | 1,(1.15%) | 0,(0%) | 1,(1.35%) | 0.675 |
| anti- Scl-70 (n, %) | 0,(0%) | 0,(0%) | 0,(0%) | 1.000 |
| anti- Ro52 (n, %) | 67,(77.01%) | 11,(84.62%) | 56,(75.68%) | 0.482 |
| anti- Jo-1 (n, %) | 3,(3.45%) | 1,(7.69%) | 2,(2.70%) | 0.366 |
| anti-CENP-B (n, %) | 7,(8.05%) | 0,(0%) | 7,(9.46%) | 0.250 |
Abs: antibodies; ENA: Extractable nuclear antigen; *P<0.05; **P<0.01; ***P<0.001.