Table 2.

Inter- and intra-observer reliability for detecting malignant lesions and specific histological entities, for beginners, trained observers and experts

Parameter	Detection of malignant lesion		Detection of specific histological entity
	HDL-NBI	Fibre-optic laryngoscopy	HDL-NBI	Fibre-optic laryngoscopy
Inter-observer reliability
– Beginners	0.55	0.51	0.49	0.41
– Trained observers	0.66	0.51	0.54	0.43
– Experts	0.77	0.56	0.57	0.49
Intra-observer reliability
– Beginners	0.59	0.63	0.55	0.60
– Trained observers	0.83	0.62	0.69	0.63
– Experts	0.70	0.75	0.68	0.66

Data represent κ-values. HDL-NBI = high-definition laryngoscopy with narrow band imaging