Early gastric cancer diagnostic ability of ultrathin endoscope loaded with laser light source

Table 1 Clinical background, gastric cancer detection rates, and the details of the two groups before matching

	Ultrathin endoscope	Conventional endoscope	P value
Number of screened subjects	140	235
Transnasal	41 (29.3%)	0 (0%)	-
Sedation	16 (11.4%)	74 (31.5%)	< 0.001
Age in yr, median (range)	74 (43-89)	73 (43-93)	0.49
Gender, male	99 (70.7%)	187 (79.6%)	0.05
Helicobacter pylori positive	6 (4.3%)	9 (3.8%)	0.83
Atrophy, open type	108 (77.1%)	197 (83.8%)	0.11
Operator (expert/nonexpert)	99/41	178/57	0.28
Number of gastric cancer	12	20
Number of subjects with gastric cancer/detection rate	12 (8.6%)	18 (7.7%)	0.75
Location (U/M, L)	4/4, 4	3/11, 6	0.22
Size in mm, median (range)	5 (3-30)	6.5 (3-18)	0.37
Morphological type (I, IIa/IIb, IIc)	0, 6/0, 6	2, 6/0, 12	0.09
Depth of invasion (m/sm)	10/2	20/0	0.06