Item | PG | SMG |
Echogenicity | ||
Mean | 0.62 | 0.28 |
Min–Max | 0.42–1.00 | 0.00–0.58 |
Homogeneity | ||
Mean | 0.52 | 0.26 |
Min–Max | 0.16–0.87 | −0.05 to 0.87 |
Hyperechoic bands | ||
Mean | 0.38 | 0.19 |
Min–Max | 0.11–0.64 | −0.09 to 0.39 |
Number of hypoechoic/anechoic areas* | ||
Mean | 0.54 | 0.27 |
Min–Max | 0.34–0.88 | 0.09–0.51 |
Size of the largest hypoechoic/anechoic area* | ||
Mean | 0.41 | 0.17 |
Min–Max | 0.29–0.79 | 0.04–0.41 |
Location of hypoechoic/anechoic areas | ||
Mean | 0.58 | 0.30 |
Min–Max | 0.26–0.85 | 0.08–0.65 |
Number of abnormal lymph nodes * | ||
Mean | – | – |
Min–Max | – | – |
Normal lymph nodes | ||
Mean | 0.13 | 0.01 |
Min–Max | −0.07 to 0.28 | −0.09 to 0.26 |
Calcifications | ||
Mean | 0.03 | 0.03 |
Min–Max | −0.05 to 0.37 | −0.10 to 0.19 |
Posterior border visibility | ||
Mean | 0.02 | 0.15 |
Min–Max | −0.16 to 0.18 | 0.00–0.48 |
Diagnosis advice* | ||
Mean | 0.66 | 0.38 |
Min–Max | 0.30–0.97 | 0.12–0.65 |
Quantitative variables were then categorised as follows: number of hypoechoic/anechoic areas: None (0), 1–4 (1),≥5 (2); size of the largest area: None (0), ≤2 (1), >2 (2); abnormal lymph nodes: No (0), Yes (1).
*Diagnosis advice was given in regard with the typical pattern of pSS on images and not in patients with pSS.
PG, parotid gland; pSS, primary Sjögren’s syndrome; SMG, submandibular gland.