Impact of a stewardship program on bacteraemia in adult inpatients
ESPERANZA MERINO, ELENA CARO, JOSÉ M. RAMOS, VICENTE BOIX, ADELINA GIMENO, JUAN CARLOS RODRÍGUEZ, GERÓNIMA RIERA, PATRICIO MÁS-SERRANO, JOSÉ SANCHÉZ-PAYA, SERGIO REUS, DIEGO TORRÚS, JOAQUÍN PORTILLA
Background. Bloodstream infections (BSIs) are associated with considerable morbidity and mortality among inpatients. The aim of this study was to evaluate the impact of a stewardship program on clinical and antimicrobial therapy-related outcomes in patients with bacteraemia. Methods. Single-centre, before-and-after quasi-experimental study in adult inpatients. Over 1 January 2013 to 31 June 2013 all patients aged 18 years or older with a bacteraemia (interven-tion group, N=200) were compared to a historical cohort (1 Janu-ary 2012 to 31 December 2012) (control group, N=200). Results. Following blood culture results and adjusting for potential confounders, the stewardship program was associated with more changes to antibiotic regimens (adjusted odds ratio [ORa]: 4.6, 95% CI 2.9, 7.4), more adjustments to antimicrobial therapy (ORa: 2.4, 95% CI 1.5, 3.8), and better source control in the first five days (ORa 1.6, 95% CI: 1.0, 2.7). In the subgroup that initially received inappropriate empiric treatment (n=138), the intervention was associated with more antibiotic changes (OR: 3.9, 95% CI: 1.8, 8.5) and a better choice of definitive antimicrobial therapy (OR 2.3 95% CI: 1.2, 4.6). There were also more antibiotic changes in the subgroups with both Gram-negative (OR: 2.8, 95% CI: 1.6, 4.9; n=217) and Gram-positive (OR: 4.6, 95% CI: 1.8, 9.9; n=135) bacteraemia among those receiving the intervention, while the Gram-positive subgroup also received more appropriate definitive antimicrobial therapy (OR: 3.9, 95% CI: 1.8, 8.8). Conclusion. The stewardship program improved treatment of patients with bacteraemia and appropriateness of therapy.
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