Efficacy of SpyGlassTM-directed biopsy compared to brush cytology in obtaining adequate tissue for diagnosis in patients with biliary strictures

Table 3 Inflammatory activity

		Brush				Total
		None	Low	Moderate	High
Biopsy	None	0	1	0	0	1
	Low	0	11	0	0	11
	Moderate	0	8	0	0	8
	High	1	6	0	2	9
Total		1	26	0	2	29

Signs of inflammation by method. Bowker’s test for symmetry of contingency tables yielded a P-value of 0.014.