Characteristics of patients with pSS and sicca controls.
| pSS, n = 385 | Sicca Controls, n = 136 | |
|---|---|---|
| Female sex | 349/385 (91) | 115/136 (85) |
| Age, yrs, mean + SD (range) | 52.8 + 13.5* (18–82) | 55.2 + 14.4* (24–79) |
| UWSF ≤ 0.1 mL/min | 233/262 (89) | 30/38 (68) |
| SWSF < 1 mL/min | 284/380 (75) | 51/130 (39) |
| van Bijsterveld score ≥ 4 | 311/382 (81) | 41/133 (31) |
| Schirmer test ≤ 5 | 278/385 (72) | 62/134 (46) |
| Biopsy focus score ≥ 1 | 303/356 (85) | 11/101 (11) |
| Anti-La-positive | 225/381 (59) | 7/135 (5.2) |
| Anti-Ro -positive | 326/382 (85) | 6/135 (4.4) |
Values are expressed as n/N (%) unless otherwise indicated.
↵* P < 0.05 between pSS and sicca cohorts. pSS: primary Sjögren syndrome; SWSF: stimulated whole salivary flow; UWSF: unstimulated whole salivary flow.