Impaired swallowing mechanics of post radiation therapy head and neck cancer patients: A retrospective videofluoroscopic study

Table 1 Inter-rater reliability of each swallowing outcome and kinematic measurement as determined by intraclass correlation coefficients

	Intraclass correlation coefficient	Lower 95%CI limit	Upper 95%CI limit
Penetration-aspiration scale	0.87	0.75	0.93
Normalized residue ratio scale (valleculae)	0.93	0.85	0.97
Normalized residue ratio scale (piriform recess)	0.91	0.82	0.96
Anterior sling distance measurement	0.87	0.75	0.93
Posterior sling distance measurement	0.88	0.77	0.94
Anterior sling time measurement	0.88	0.74	0.95
Posterior sling time measurement	0.90	0.77	0.96
Pharyngeal constriction ratio	0.81	0.66	0.90