Table 3.

Multivariate Analyses for Mortality in Patients With Pitt Score <2 According to Gram-Negative and Gram-Positive BSI

A, Patients With Gram-Negative Isolates (n = 295)	30 d			90 d
Variables	HR	P	95% CI	HR	P	95% CI
Age	0.98	.14	0.95–1.00	0.99	.58	0.97–1.01
Immunosuppression	1.69	.14	0.82–3.47	1.98	.016	1.13–3.45
Charlson CI >4 vs <4	7.73	.001	2.32–25.7	7.30	<.001	2.79–19.0
MDR vs no MDR	1.19	.63	0.56–2.51	1.54	.11	0.89–1.86
XDR vs no MDR	7.25	.002	2.07–25.3	7.25	.001	2.13–24.6
B, Patients with gram-positive isolates (n = 236)	30 d			90 d
Variables	HR	P	95% CI	HR	P	95% CI
Age	1.01	.23	0.98–1.05	1.01	.15	0.99–1.03
Immunosuppression	0.57	.27	0.21–1.56	0.96	.90	1.52–1.77
Charlson CI >4 vs <4	4.19	.03	1.12–15.6	4.30	.001	1.79–10.3
MDR vs no MDR	1.38	.41	0.63–3.03	1.17	.58	0.66–2.05

Abbreviations: BSI, bloodstream infection; CI, comorbidity index; MDR, multidrug-resistant; XDR, extensively drug-resistant.