Table 4 Intra- and interobserver agreement of apparent diffusion coefficient (ADC) value and ADC histogram parameters

From: Whole-volume ADC Histogram and Texture Analyses of Parotid Glands as an Image Biomarker in Evaluating Disease Activity of Primary Sjögren’s Syndrome

Index

Low-activity group

Moderate–high-activity group

Intraobserver

Interobserver

Intraobserver

Interobserver

ADC

0.932 (0.902–0.948)

0.956 (0.913–0.974)

0.899 (0.892–0.932)

0.907 (0.893–0.923)

ADCmean

0.982 (0.975–0.990)

0.989 (0.974–0.993)

0.908 (0.899–0.923)

0.905 (0.900–0.913)

Skewness

0.915 (0.910–0.918)

0.917 (0.910–0.922)

0.899 (0.889–0.912)

0.932 (0.892–0.951)

Kurtosis

0.924 (0.910–0.953)

0.938 (0.921–0.979)

0.911 (0.899–0.921)

0.915 (0.903–0.922)

Entropy

0.957 (0.950–0.965)

0.935 (0.923–0.942)

0.926 (0.912–0.935)

0.937 (0.921–0.943)

  1. All data in the tables are ICC (95% CI).
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