Table 2.

Frequencies and percentages of the different types of superior mesenteric arteries according to evaluation type and Yada classification

Artery location	Evaluation type	Frequency	%	95% CI lower %	95% CI upper %
Anterior	Intraoperative	190	59.9	54.7	65.0
	Contrast-enhanced CT	127	40.1	35.0	45.3
	Total	317	100.0	100.0	100.0
Posterior	Intraoperative	125	50.8	44.5	57.7
	Contrast-enhanced CT	121	49.2	42.3	55.5
	Total	246	100.0	100.0	100.0