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Combination of Salivary Gland Ultrasonography and Virtual Touch Quantification for Diagnosis of Sjögren's Syndrome: A Preliminary Study

Overview
Journal Biomed Res Int
Publisher Wiley
Date 2017 Jan 13
PMID 28078285
Citations 8
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Abstract

A total of 136 subjects (51 SS patients, 35 sicca syndrome patients without SS, and 50 healthy volunteers) were enrolled in this study. The mean SWV value for salivary glands of SS patients was statistically higher than that of controls (2.81 ± 0.66 m/s versus 1.85 ± 0.28 m/s for parotid glands and 2.29 ± 0.34 m/s versus 1.82 ± 0.25 m/s for submandibular glands, resp.). Combining SWV values of parotid and submandibular glands gives a sensitivity of 88.2% (95% CI: 76.1-95.6%) and specificity of 96.0% (95% CI: 86.3-99.5%) at the cutoff point of 2.19 m/s, with an AUROC of 0.954 (95% CI: 0.893-0.986). In addition, combining SGUS score and SWV value yields a sensitivity of 98.0% (95% CI: 89.6-100%), specificity of 90.0% (95% CI: 78.2-96.7%), and AUROC of 0.962 (95% CI: 0.904-0.990). Classification tree considering the sequential use of SGUS score and SWV value achieved 92.1% accuracy for diagnosis of SS. Similarly, the ROC curve of combined SGUS scores and SWV values yields an AUROC of 0.954 (95% CI: 0.885-0.987), sensitivity of 97.1% (95% CI: 85.1-99.9%), and specificity of 92.2% (95% CI: 81.1-97.8%) for separating sicca syndrome patients (without SS) from SS patients. Combining SGUS and VTQ provides a promising tool for diagnosis of SS.

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