Application of narrow band imaging and Lugol's iodine staining in screening for nasopharyngeal carcinoma

Table 2 Comparison of findings on endoscopic screening and histopathology

Endoscope mode	Endoscopic screening results	Histopathological results		Total	χ²	p
Endoscope mode	Endoscopic screening results	Chronic hyperplastic nasopharyngitis (n = 130)	NPC (n = 29)	Total	χ²	p
WLE	Chronic nasopharyngitis	98	8	106	24.377	< 0.01
WLE	NPC	32	21	53	24.377	< 0.01
NBI	Chronic nasopharyngitis	111	10	121	33.778	< 0.01
NBI	NPC	19	19	38	33.778	< 0.01
Iodine staining	Chronic nasopharyngitis	106	5	111	19.392	< 0.01
Iodine staining	NPC	24	24	48	19.392	< 0.01
Combined prediction	Chronic nasopharyngitis	127	12	139	68.901	< 0.01
Combined prediction	NPC	3	17	20	68.901	< 0.01

NPC Nasopharyngeal carcinoma, WLE White light endoscopy, NBI Narrow band imaging

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