Table 1: Patient characteristics.

Group AGroup B value

Age 68.8 ± 9.2 69.6 ± 9.7 0.815
Gender
 Male : female4 : 5 27 : 10 0.127
Symptom
 Jaundice 6 29 0.460
 Abdominal pain 7 8 0.001
 Fever 2 5 0.609
 Anorexia 0 10 0.172
 Asymptomatic 2 5 0.609
Associated disease
 GS 9 7*<0.01
 Cholangitis 2 4 0.581

*following cholecystectomy in one case.