2033. A Systematic Review of Systematic Reviews: Procalcitonin in the ICU to Guide Antibiotic Therapy

BACKGROUND: Antimicrobial resistance is an emerging global health crisis with overall antimicrobial use a key contributor. Strategies to safely reduce antibiotic course length are important. Procalcitonin (PCT) is a serum biomarker produced in the presence of bacterial infection. There have been many systematic reviews (SRs) evaluating PCT in various populations but its use remains controversial. The aim of this SR of SRs was to evaluate the extent to which PCT in critical care (ICU) impacts antibiotic duration and other reported outcomes. METHODS: A systematic search of major databases using an “a priori” strategy and protocol was performed. SRs were included if one of the reported outcomes related to antibiotic duration or initiation in the ICU. Data were extracted by an author, checked and corrected independently by another author. The quality of SRs was assessed by 2 authors independently using AMSTAR II. Disagreements were resolved by consensus with a third author. Results are presented narratively and in tabular format (Table 1). RESULTS: Figure 1 shows the PRISMA diagram. 19 SRs were included. The number of patients included ranged from 308 to 6,037 (median = 1,316) across SRs. Overall, there was a consistent finding of a statistically significant (sf) reduction in antibiotic duration in study groups using PCT cessation protocols (all studies in Table 1). 3 SRs did not contain suitable statistics for inclusion in Table 1. SRs that presented the antibiotic duration outcome as a mean or median difference in exposure days (N = 16) showed a median reduction of 2.10 days (range −1.19 to -5) with PCT use. 1 SR found an sf decrease in mortality with PCT use. 4 SRs included antibiotic initiation as an outcome: 2 found an sf decrease in antibiotic prescription rate with PCT; 2 found no difference. CONCLUSION: SRs have found that PCT use in ICU leads to an sf reduction in antibiotic duration without impacting mortality. There are no data presented in the SRs about the impact of this on antimicrobial resistance. Few SRs detail the infections included; thus the applicability of these findings to a single ICU remains challenging. Other outcomes, such as length of stay, are not affected by PCT use in ICU. [Image: see text] [Image: see text] DISCLOSURES: All authors: No reported disclosures.