Table II. Risk factors for bactibilia in patients with and without bacteria present in their bile.

Parameter	Bacteria present 20 (15.6%)	Bacteria absent 108 (84.4%)
Risk factors for bactibilia
Acute cholecystitis	4 (20%)*	4 (4.3%)
Common duct stones	5 (25%)*	11 (10.8%)
Emergency surgery	5 (25%)*	2 (2.2%)
Intraoperative findings	5 (20%)*	7 (7.6%)
Age > 70 years	1 (5%)	5 (5.4%)
Overall proportion with risk factors for bactibilia	20 (100%)*	29 (30.3%)

*p<0.05 for bacteria present versus organisms absent (χ² test).