Diagnosis of mild chronic pancreatitis (Cambridge classification): Comparative study using secretin injection-magnetic resonance cholangiopancreatography and endoscopic retrograde pancreatography

Table 1a Sensitivity and specificity of MRCP for abnormal branch pancreatic ducts as compared with ERCP by Reviewer 1. Result of the assessment of images

Location of abnormal	Number of lesions				Sensitivity (%)	Specificity (%)
branch pancreatic ducts	TP	TN	FP	FN
Head	25	40	13	15	25/40 (63)	40/53 (75)
Body	16	88	18	12	16/28 (57)	88/106 (83)
Tail	4	19	6	5	4/9 (44)	19/25 (76)

TP: True positive; TN: True negative; FP: False positive; FN: False negative; Numbers are numbers of patients (numbers in parentheses are percentages).

Table 1b Sensitivity and specificity of MRCP for abnormal branch pancreatic ducts as compared with ERCP findings by Reviewer 2. Result of the assessment of images

Location of abnormal	Number of lesions				Sensitivity (%)	Specificity (%)
branch pancreatic ducts	TP	TN	FP	FN
Head	22	44	9	18	22/40 (55)	44/53 (83)
Body	18	87	19	10	18/28 (64)	87/106 (82)
Tail	4	18	7	5	4/9 (44)	18/25 (72)

Table 2 Sensitivity and specificity of MRCP for mild chronic pancreatitis (Cambridge Classification)

	Sensitivity (%)	Specificity (%)
Reviewer 1	10/16 (63)	9/12 (75)
Reviewer 2	9/16 (56)	10/12 (83)

Table 3 Interobserver agreement regarding the identification of abnormal branch pancreatic ducts (κ statics)

Location of abnormal branch pancreatic ducts	κvalue
Abnormal branch, head	0.67
Abnormal branch, body	0.68
Abnormal branch, tail	0.86
Diagnosis of mild chronic pancreatitis	0.79