Table 3.

Risk Factors for Infective Endocarditis in Patients Who Had Both TTE and TEE

Variablea	Odds Ratio	95% CI	P Value
History of endocarditis	10	1.5–66	.017
Source of bacteremia not known	4.3	1.4–13	.01
Underlying heart disease known to predispose to endocarditis	3	1.0–9	.045

^aVariables included hemodialysis, presence of underlying heart disease known to predispose to endocarditis, history of endocarditis, intravenous illicit drug use, origin of infection (community associated, healthcare associated, nosocomial); whether source of bacteremia was known, whether Staphylococcus aureus were methicillin resistant, and presence of prolonged bacteremia [26] or prolonged fever [16]. Omnibus Test of Model Coefficients P < .001; Nagelkerke R2 = 0.362, Cox and Snell R2 = 0.243; Hosmer Lemeshow test P = .59. There was no interaction between terms.