Appendectomy as a Risk Factor for Bacteremic Biliary Tract Infection Caused by Antibiotic-Resistant Pathogens

Table 5

Risk factors for antibiotic-resistant bacteria (multivariate analysis).

	Odds ratio
	(95% confidence interval)
Appendectomy	3.02 (1.15–7.87)
Pitt bacteremia score (per 1)	1.31 (0.54–1.48)	0.13
Malignancy	1.47 (0.60–3.56)	0.40
Antibiotic use within the preceding 3 months	3.06 (1.26–7.64)
Indwelling biliary device	1.34 (0.55–3.19)	0.51
Hospitalization within the preceding 30 days	2.45 (0.99–6.09)	0.051
Bilioenteric anastomosis or sphincterotomy	3.77 (1.51–9.66)

means statistically significant.