Background: Parenteral nutrition (PN) is an available option for nutritional therapy and is often required in the hospital setting to overcome malnutrition.
Objectives: The aim of this study was to assess whether PN is associated with an increased risk of mortality or infectious complications in all groups of hospitalized patients compared with those receiving other nutritional support strategies.
Methods: For this systematic review and meta-analysis MEDLINE, Embase, Cochrane Central, Scopus, clinicaltrials.gov, and Web of Science were searched for randomized controlled trials (RCTs) and observational studies with parallel groups that explored the effect of PN on mortality and infectious complications, published until March 2021. Two independent reviewers extracted the data and assessed the risk of bias. Fixed-effects meta-analysis was performed to compare the groups from RCTs. Trial sequential analysis (TSA) was used to identify whether the results were sufficient to reach definitive conclusions.
Results: Of the 83 included studies that compared patients receiving PN with those receiving other strategies, 67 RCTs were included in the meta-analysis. PN was not associated with a higher risk of mortality (RR: 1.01; 95% CI: 0.95, 1.07). On the other hand, PN was associated with a higher risk of infectious events (RR: 1.23; 95% CI: 1.12, 1.36). PN was specifically associated with abdominal infection and catheter infection. The TSA showed that there were sufficient data to make numerical conclusions about mortality, any infectious event, and abdominal infectious complications.
Conclusions: This study suggests that although PN is not associated with greater mortality in hospitalized patients, it is associated with infectious complications. Through TSA, definite conclusions about survival and infection rates could be made.This review was registered at www.crd.york.ac.uk/prospero/ as CRD42018075599.
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