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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%