BACKGROUND: Bloodstream infection represents a major threat among neonates under intensive care with considerable impact on morbidity and mortality. This study evaluated extra stay, attributable mortality and the risk factors associated with late-onset bloodstream infection (LO-BSI) among neonates admitted to a neonatal intensive care unit during a 4-year period. METHODS: A retrospective matched cohort study was conducted. For each case, there was one control patient without LO-BSI matched for sex, birth weight, gestational age, duration of hospitalization prior to the date of LO-BSI in the respective cases, underlying illness and birth date. A novel test, sequential plan, was employed for attributable mortality analysis in addition to standard tests. Multiple logistic regression was employed for risk factor analysis. RESULTS: Fifty pairs of cases and controls were compared. LO-BSI prolonged hospital stay of 25.1 days in pairs where both subjects survived. Overall attributable mortality was 24% (95% CI: 9-39% p < 0.01) and specific attributable mortality due to Staphylococcus epidermidis was 26.7% (95% CI: 23-30.4%; p = 0.01). Blood and/or blood components transfusion was independently associated with neonatal LO-BSI (OR: 21.2; 95% CI: 1.1-423). CONCLUSIONS: LO-BSI infection prolongs hospital stay and is associated with increased mortality among neonates. In the present series, blood transfusion was a significant risk factor for LO-BSI.
BACKGROUND:Bloodstream infection represents a major threat among neonates under intensive care with considerable impact on morbidity and mortality. This study evaluated extra stay, attributable mortality and the risk factors associated with late-onset bloodstream infection (LO-BSI) among neonates admitted to a neonatal intensive care unit during a 4-year period. METHODS: A retrospective matched cohort study was conducted. For each case, there was one control patient without LO-BSI matched for sex, birth weight, gestational age, duration of hospitalization prior to the date of LO-BSI in the respective cases, underlying illness and birth date. A novel test, sequential plan, was employed for attributable mortality analysis in addition to standard tests. Multiple logistic regression was employed for risk factor analysis. RESULTS: Fifty pairs of cases and controls were compared. LO-BSI prolonged hospital stay of 25.1 days in pairs where both subjects survived. Overall attributable mortality was 24% (95% CI: 9-39% p < 0.01) and specific attributable mortality due to Staphylococcus epidermidis was 26.7% (95% CI: 23-30.4%; p = 0.01). Blood and/or blood components transfusion was independently associated with neonatal LO-BSI (OR: 21.2; 95% CI: 1.1-423). CONCLUSIONS: LO-BSI infection prolongs hospital stay and is associated with increased mortality among neonates. In the present series, blood transfusion was a significant risk factor for LO-BSI.
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