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Characteristics of patients
| Group F | Group S | P value | |
| No. of patients | 88 | 85 | |
| Sex (male/female) | 48/40 | 47/38 | NS |
| Mean age (yr) | 68 (36–93) | 70 (32–96) | NS1 |
| Diagnosis | |||
| Choledocholithiasis | 58 | 59 | |
| Malignant stenosis | 20 | 17 | |
| Benign stenosis | 6 | 8 | |
| Postoperative leak | 2 | 1 | |
| Scleroses cholangitis | 1 | 0 | |
| Mirizzi’s syndrome | 1 | 0 |
Evaluation of statistical significance according to Student t test for unpaired data. Evaluation of statistical significance according to χ2 test. NS: Not significant.
