Sonographic appearance of anal cushions of hemorrhoids

Table 3 Cohen’s kappa co-efficiency between mosaic pattern in transrectal ultrasound and arteriovenous fistula in pathology in stages III and IV hemorrhoids

Pathology	Mosaic pattern in transrectal US		Total
	Positive	Negative
Positive	20	0	20
Negative	2	16	18
Total	22	16	38

The compatibility (Cohen’s kappa co-efficiency value) between the transperianal US and pathology was calculated as 0.8939. The distribution of the Cohen kappa (κ) co-efficiency values: very high (κ > 0.8), high (κ = 0.61-0.8), moderate (κ = 0.41-0.6), low (κ = 0.21-0.4), very low (κ ≤ 0.2).