Endoscopists and endoscopic assistants’ qualifications, but not their biopsy rates, improve gastric precancerous lesions detection rate

Table 1 Baseline data and proportions of pathological diagnoses by biopsy site, n (%)

	Gastroscopes	NAG, %	AG/IM, %	GPLs, %	GC, %	Other tumors, %
Total	45805 (100)	62.45	28.98	5.64	2.75	0.18
Age groups (median age, 55 years; range: 18-95 years)
18-49 years	15005 (32.76)	25.13	6.38	0.94	0.28	0.03
50-69 years	25037 (54.66)	31.69	18.02	3.53	1.32	0.10
≥ 70 years	5763 (12.58)	5.64	4.58	1.17	1.15	0.05
Sex
Male	24455 (53.39)	31.56	16.16	3.70	1.90	0.06
Female	21350 (46.61)	30.89	12.82	1.93	0.84	0.12

NAG: Nonatrophic gastritis; AG/IM: Atrophic gastritis/intestinal metaplasia; GPLs: Gastric precancerous lesions; GC: Gastric cancer.