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Table 5 Intra-observer agreement of the CT & MRI & cross section examination per patient (P patient) for the primary tumor site and LN

From: Interreader reproducibility of the Neck Imaging Reporting and Data system (NI-RADS) lexicon for the detection of residual/recurrent disease in treated head and neck squamous cell carcinoma (HNSCC)

Groups Reader K 95% CI P value Percent agreement
P patient: CT (No = 45) 1 0.813 0.676–0.950 < 0.001* 86.6%
2 0.783 0.634–0.931 < 0.001* 84.5%
P patient: MRI (No = 52) 1 0.915 0.820–1.0 < 0.001* 94.2%
2 0.884 0.774–0.993 < 0.001* 92.2%
P patient: Cross section (No = 97) 1 0.867 0.784–0.949 < 0.001* 90.7%
2 0.838 0.747–0.928 < 0.001* 88.6%
P lesion for oral cavity: Cross section (No = 39) 1 0.879 0.747–1.0 < 0.001* 92.3%
2 0.836 0.685–0.986 < 0.001* 89.8%
P lesion for larynx: Cross section (No = 38) 1 0.883 0.757–1.0 < 0.001* 92.2%
2 0.848 0.706–0.989 < 0.001* 89.5%
LN P patient Scan: CT (No = 45) 1 1 1–1 < 0.001* 100%
2 0.873 0.710–1.0 < 0.001* 95.6%
LN P patient Scan: MRI (No = 52) 1 0.755 0.567–0.943 < 0.001* 83.9%
2 0.834 0.681–0.986 < 0.001* 92.3%
LN P patient Scan: Cross section (No = 97) 1 0.860 0.744–0.975 < 0.001* 94.9%
2 0.851 0.739–0.962 < 0.001* 93.9%