Endoscopic diagnosis of cervical esophageal heterotopic gastric mucosa with conventional and narrow-band images

Table 1 Demographics, social habits, and clinical symptoms in the 2 arms of the study n (%)

	NBI (n = 760)	CI (n = 760)	P value
Men	349 (46)	363 (48)	0.50
Age (yr), mean ± SD	51.2 ± 15.3	51.6 ± 13.7	0.58
Social habits
Alcohol use	75 (10)	56 (7)	0.10
Smoking	161 (21)	176 (23)	0.92
Clinical symptoms
Reflux symptoms	260 (34)	240 (32)	0.30
Throat symptoms	61 (8)	64 (8)	0.85
Dysphagia	16 (2.1)	12 (1.6)	0.57

CI: Conventional imaging; NBI: Narrow-band imaging.