Table 4.

Risk factors for death in patients with brucella endocarditis

Risk factor	Hazard Ratio	Associationa	95% CIb
Medical treatment only	15.44	<0.001	4.32 – 55.14
Positive blood culture	0.21	0.01	0.06 – 0.68
Congestive heart failure	2.05	0.04	1.06 – 14.18
Mitral valve involvement	0.28	0.062	0.08 – 1.06
Year of diagnosis	1.04	0.229	0.98 – 1.11
Age > 50	0.44	0.268	0.11 – 1.87
Age 30–49	0.69	0.574	0.19 – 2.53
Female sex	0.79	0.738	0.20 – 3.12
Prosthetic valve endocarditis	1.02	0.979	0.23 – 4.43

^aAssociation is expressed as the p value derived from a chi-square test.

^bConfidence interval.