Objectives: Late-onset sepsis is a frequent complication in neonatal intensive care units. This study aims to understand the effect of late-onset sepsis on mortality in hospitalised neonatal patients across different gestational ages.
Design: This is a single-centre, historical cohort study including neonates admitted to hospital during a 10-year period (2002 - 2011). Neonates were stratified by gestational age: extremely preterm (<28 weeks), very preterm (28 to 32 weeks), late preterm (33 to 36 weeks), full term (>37 weeks).
Setting: Tertiary NICU in Ghent, Belgium.
Main Outcome Measures: Logistic regression analysis was used to assess adjusted relationships between late-onset sepsis and mortality, reported as odds ratio (OR) and 95% confidence interval (CI).
Results: A total of 4928 neonates were included, of which 2071 were term (42.0%), 1425 were late preterm (28.9%), 1165 very preterm (23.6%) and 264 were extremely preterm neonates (5.4%). 40 neonates developed late-onset sepsis (8.2 episodes/1000 patient days). Overall, in-hospital mortality was 5.4%. Late-onset sepsis was an independent risk factor for mortality in the total cohort (OR = 2.41; 95% CI = 1.46-3.96). However, when gestational age groups were considered separately, late-onset sepsis was associated with mortality in very preterm neonates (OR = 2.45; 95% CI = 1.03-5.84) and in the late preterm neonates (OR = 3.92; 95% CI = 1.41-10.87), but not in other neonates. Comorbidities burdening neonatal hospital survival include acute lung disease, brain damage, periventricular leukomalacia, surgery, and broncho-pulmonary dysplasia.
Conclusion: Late-onset sepsis is an independent risk factor for mortality in very preterm and late preterm neonates. Understanding how late-onset sepsis among other factors impact mortality enables a patient and family-centred approach to nursing care including the anticipation of realistic milestones.
Implications For Clinical Practice: Late-onset sepsis is especially detrimental to preterm neonates and this could be taken into consideration by nurses when communicating with families in the perinatal period.
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