Sjögren's disease & overlap diseases

Diagnostic utility of salivary gland ultrasonography in suspected primary Sjögren’s disease: a comparison of OMERACT-based ordinal and summative scoring

Arthritis Res TherPublished Diagnostic accuracy study

Authors' conclusion

Although overall diagnostic performance was modest, SGUS scoring based on OMERACT definitions demonstrated high specificity at selected thresholds.

Study context

Population
Consecutive patients with suspected primary Sjögren’s disease (SjD) undergoing salivary gland ultrasonography (SGUS) of the four major salivary glands23 biopsy-positive (38.3%)
Participants
60 patients
Comparison
SGUS ordinal score (0-6) vs SGUS sum score (0-12), both derived from OMERACT 0-3 grading
Outcome
Diagnostic accuracy (ROC curve analysis) vs labial salivary gland biopsy
Methodological detailsconsecutive patients, labial salivary gland biopsy as reference standard, ROC curve analysis
  • Consecutive patients
  • Labial salivary gland biopsy as reference standard
  • ROC curve analysis

Performance

As reported in the abstract

Diagnostic accuracy vs labial biopsy
Test or modelAUCSpecificity at threshold ≥ 4Specificity at ≥ 5
Ordinal score0.687 (95% CI: 0.546-0.828)91.9% (95% CI: 83.1-100%)— not stated in the abstract
Sum score0.683 (95% CI: 0.543-0.824)— not stated in the abstract89.2% (95% CI: 79.2-99.2%)

AUC

Ordinal score0.687 (95% CI: 0.546-0.828)
Sum score0.683 (95% CI: 0.543-0.824)

Specificity at threshold ≥ 4

Ordinal score91.9% (95% CI: 83.1-100%)
Sum score— not stated in the abstract

Specificity at ≥ 5

Ordinal score— not stated in the abstract
Sum score89.2% (95% CI: 79.2-99.2%)

— not stated in the abstract

Further findings

Biopsy-positive cases in which labial biopsy could potentially have been deferred

OutcomeP value
Association with anti-Ro52 antibody positivityOrdinal score · score ≥ 2P = 0.017
Association with anti-Ro52 antibody positivitySum score · score ≥ 3P = 0.007
  • Biopsy-positive cases in which labial biopsy could potentially have been deferred: at high-specificity thresholds (ordinal ≥ 4; sum score ≥ 5)

Original publication

Diagnostic utility of salivary gland ultrasonography in suspected primary Sjögren’s disease: a comparison of OMERACT-based ordinal and summative scoring. Arthritis Res Ther. Published 19 February 2026. doi:10.1186/s13075-026-03772-3

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