Nasobiliary drainage after endoscopic papillary balloon dilatation may prevent postoperative pancreatitis

Table 1 Baseline characteristics and results

Variable	Group 1(n = 113)	Group 2(n = 105)	P value
Age (yr)	60.1 ± 9.7	57.9 ± 10.3	0.105
Sex, male/female	68/45	71/34	0.253
Presence of gallstones (n)	13	9	0.473
History of cholecystectomy (n)	7	9	0.501
Total leukocyte count (× 109/L)	5.8 ± 1.8	6.1 ± 2.1	0.259
Amylase (U/L)	88.5 ± 22.3	91.2 ± 24.5	0.396
TB (mg/dL)	4.6 ± 1.1	4.5 ± 1.0	0.482
ALT (IU/L)	124.8 ± 33.6	115.6 ± 36.1	0.052
Aspartate aminotransferase (IU/L)	98.6 ± 26.7	102.6 ± 33.4	0.088
Prothrombin time (s)	11.2 ± 2.1	11.1 ± 2.7	0.761
Platelet count (× 106/L)	145.2 ± 33.1	151.1 ± 31.2	0.176
Maximum diameter of CBD (mm)	12.5 ± 2.6	13.1 ± 2.7	0.095

Data are expressed as mean ± SD. TB: Total serum bilirubin; ALT: Alanine aminotransferase; CBD: Common bile duct.