Table 2. Narrow-band imaging (NBI) assessment of microvascular density and histological assessment of vascular density in gastric carcinoma.

	Differentiated type carcinoma	Undifferentiated type carcinoma	P value
NBI microvascular density, %	10.02 ± 4.72	4.02 ± 0.40	< 0.001
Histological vascular density, %
Whole mucosal layer	5.81 ± 3.17	3.25 ± 1.21	0.016
Surficial mucosal layer (0 – 100 μm)	6.38 ± 3.73	3.66 ± 1.46	0.029