Table 5. Frequency of meandering main pancreatic duct (MMPD) and its contribution to idiopathic pancreatitis arranged by anatomical subtypes of MMPD and onset types of idiopathic pancreatitis.

	All MMPDb	Non-MMPD	Pc	ORd
Community	11 [2]	493
All idiopathic	6 [20]	24	<0.001a	11.1 [3.1–36.2]
Acute	1 [14]	6	0.154
Chronic	1 [8]	12	0.266
Recurrent acute	4 [40]	6	<0.0001a	29.0 [5.3–144.3]

^a, significant;

^b,numbers in square brackets represent percentages;

^c,Fisher's exact test;

^d,numbers in square brackets represent the 95% confidence interval; OR, odds ratio.