Prospective evaluation of the cause of acute pancreatitis, with special attention to medicines

Table 2 Investigations during hospital stay and/or follow-up, n (%)

	Prospective group (n = 57)	Retrospective group (n = 585 evaluable)	P value
All patients with ultrasonography	51 (89.5)	420 (71.8)	0.007
All patients with CT	45 (78.9)	311 (53.1)
All patients with MRI	32 (56.1)	196 (33.5)	0.001
US	5 (8.8)	142 (24.3)
US + CT	16 (28.1)	143 (24.4)
US + MRI	7 (12.3)	86 (14.7)
US + CT+ MRI	23 (40.3)	49 (8.4)
CT alone	4 (7.0)	88 (15.4)
CT + MRI	2 (3.5)	31 (5.3)
MRI alone	0	30 (5.1)
No imaging	0	16 (2.7)

CT: Computed tomography; MRI: Magnetic resonance imaging; US: Ultrasonography.