Characteristics of SGUS score in the whole cohort and in SSA-negative patients
| SGUS score | Se (%) | Sp (%) | PPV (%) | NPV (%) | |
| Whole cohort N=269 | ≥2 | 57 | 92 | 72 | 82 |
| ≥3 | 49 | 97 | 87 | 81 | |
| 3F | 14 | 99 | 82 | 74 | |
| Anti-SSA-negative patients N=215 | ≥2 | 41 | 91 | 42 | 92 |
NPV, negative predictive value; PPV, positive predictive value; Se, sensitivity; SGUS, salivary gland ultrasound; Sp, specificity.