Role of original and modified Frey's procedures in chronic pancreatitis

Table 1 Clinical characteristics of patients

Characteristic	O Frey(n = 44)	M Frey(n = 36)	P value
Age (yr)	46 ± 12.5	48 ± 8.4	0.560
Sex			0.130
Male	35	33
Female	9	3
Etiology			0.720
Alcohol	22	21
Nicotine	7	4
Idiopathic	15	11
Pain severity index	3.84 ± 1.14	2.92 ± 1.47	0.020
Exocrine insufficiency	3	0	0.580
Endocrine insufficiency	14	17	0.450
Morphologic characters
Stone of calcification	39	29	0.360
Large cavities (> 10 mm)	7	11	0.120
Gland enlargement (> 2 × normal)	7	9	0.310
Severe organ complications
Obstruction of ductus choledochus	0	2	0.200
Ascites	0	0
Weight loss	13	9	0.650
M-ANNHEIM severity index			0.060
A	1	4
B	29	17
C	12	15
D	2	0
E	0	0
Indication for surgery
Intractable pain	38	28	0.315
Recurrent episodes	2	2
Bile duct stenosis	0	2
Risk of malignancy	4	4
Follow-up time (mo)	50.3 ± 17.3	48.7 ± 15.6	0.670

M Frey: Modified Frey’s procedure; O Frey: Original Frey’s procedure.