Effectiveness of narrow-band imaging magnification for invasion depth in early colorectal cancer

Table 2 Microvascular architecture & invasion depth

Variables			Univariate analysis P-value1	Multivariate analysis
				P-value1	Odds ratio	95% CI
		Non-dense/dense
Vessel density	m/sm-s	1/68	< 0.001	0.001	402.5	12.4-13 133.1
	sm-d	33/10
		Negative/positive
Vessel regularity	m/sm-s	8/61	< 0.001	0.038	15.9	1.2-219.1
	sm-d	38/5
		Negative/positive
Caliber regularity	m/sm-s	44/25	< 0.001	0.056	17.3	0.9-323.4
	sm-d	42/1
		Short/long
Vessel length	m/sm-s	20/49	< 0.001	0.161	0.2	0.01-2.10
	sm-d	37/6
		Positive/negative
Meandering	m/sm-s	49/20	0.002	0.110	0.1	0.01-1.60
	sm-d	41/2
		Wide/narrow
Caliber	m/sm-s	62/7	NS
	sm-d	41/2

¹χ² or Fisher’s test. 95% CI: 95% confidence interval; NS: Not significant.