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Table 2 Inter-observer agreement of the CT & MRI & cross section examination per lesion (P lesion) and per patient (P patient) for the primary tumor site

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 K 95% CI P value Percent agreement
P lesion: CT (No = 51) 0.862 0.748–0.977 < 0.001* 90.2%
P lesion: MRI (No = 60) 0.778 0.645–0.912 < 0.001* 85.0%
P lesion: Cross section (No = 111) 0.819 0.731–0.908 < 0.001* 87.39%
P lesion for oral cavity: Cross section (No = 39) 0.80 0.647–0.953 < 0.001* 82.1%
P lesion for larynx: Cross section (No = 38) 0.92 0.817–1.0 < 0.001* 94.7%
P patient: CT (No = 45) 0.843 0.713–0.973 < 0.001* 88.9%
P patient: MRI (No = 52) 0.77 0.627–0.917 < 0.001* 84.62%
P patient: Cross section (No = 97) 0.808 0.710–0.904 < 0.001* 86.6%