Internal gallbladder drainage prevents development of acute cholecystitis in a pig model: a randomized study

Table 3 Histopathological scoring system.

	Lymphatic dilatation (0-1)	Polymorphnuclear cells (0-1)	Hemorrhage (0-3)	Edema (0-3)	Pregranulation tissue (0-3)	Sum (0-11)
Drained	0.25(-0.14; 0.64)	0.25(-0.14; 0.64)	0 (0; 0)	0.25 (-0.14; 0.64)	0.38(-0.06; 0.81)	1.13(-0.39;2.64)
Undrained	1(1;1)	1(1;1)	0.75(0.36;1.14)	1.50 (0.87; 2.13)	2(01.55;2.45)	6.25(5.38;7.12)
p-value	0.0027	0.0027	0.0027	0.0023	0.0008	0.0006

The range of the possible categorical score is indicated in the paragraph in the top line. The scores for drained and undrained are demonstrated as mean (confidence interval). In the bottom line the p-values are presented.

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