Table 2.
Characteristics of patients in Groups I and II
| Group I | Group II | |
| Number of patients | 45 | 53 |
| Male/female | 18/27 | 17/36 |
| Mean age (yr) | 52.8 | 52.8 |
| Mean age of first onset (yr) | 41.9 | 47.8 |
| Biliary visualization rate during duodenography | 42.2% | 0% |
| Mean follow-up period (mo) | 38.4 | 41.9 |
| Simple IHL/IHL with choledocholithiasis | 15/30 | 14/39 |
| Recurrence rate | 22.2% | 11.3% |
| Mean number of operations | 2.07 | 1.21 |
| Number of patients with 1 operation | 22 | 45 |
| Number of patients with 2 operations | 12 | 7 |
| Number of patients with 3 operations | 7 | 0 |
| Number of patients with 4 operations | 1 | 0 |
| Number of patients with 5 operations | 0 | 1 |
| Number of patients with 6 operations | 2 | 0 |
| Number of patients with 11 operations | 1 | 0 |
| Number of patients with simple choledocholithotomy and T-tube drainage | 14 | 21 |
| Number of patients with simple hepatectomy | 7 | 13 |
| Number of patients with choledocholithotomy, T-tube drainage and hepatectomy | 18 | 17 |
| Number of patients with simple choledochojejunostomy | 4 | 1 |
| Number of patients with choledochojejunostomy and hepatectomy | 2 | 1 |