Salivary gland ultrasonography in primary Sjögren’s syndrome from diagnosis to clinical stratification: a multicentre study

Table 2 Diagnostic accuracy of the OMERACT scoring system for pSS

	Area under the curve (95% CI)	Cut-off value	SEN, %	SPE,%	PPV,%	NPV,%
Right PG	0.90 (0.869–0.930)	2	77.6	88.6	91.4	72.9
Right SMG	0.879 (0.845–0.912)	2	82.9	79.6	85.7	76
Left PG	0.893 (0.861–0.924)	2	76.0	89.8	91.7	71.8
Left SMG	0.874 (0.84–0.908)	2	83.3	77.8	84.7	76.0
Right PG + SMG^a	0.910 (0.881–0.939)	4	77.2	92.2	93.6	73.3
Left PG + SMG^b	0.904 (0.875–0.934)	4	75.6	91.6	93	71.8
Total four glands^c	0.908 (0.879–0.938)	7	78	91.6	93.2	73.9

P <0.05 determined by the McNemar test was considered statistically significant. a vs b, p =0.508; b vs c, p =0.062, a vs c, p =0.625. PG parotid gland, SMG submandibular gland, SEN sensitivity, SPE specificity, PPV positive predictive value, NPV negative predictive value

ISSN: 1478-6362