Prognostic value of combining c-reactive protein and quick sequential organ failure assessment for adult inpatients: A systematic review
Abstract ObjectiveTo examine the prognostic performance of combining the biomarker c-reactive protein (CRP) with the quick sequential organ failure assessment (qSOFA) bedside tool on mortality prediction in adult inpatients.MethodsWe searched PubMed, MEDLINE, EMBASE, Scopus, Web of Science, Science Direct, CINAHL, Open Grey, Grey Literature Report, and the Clinical Trials registry. Title, abstract, and full text screening were performed by two independent reviewers using pre-determined eligibility criteria. The eligibility criteria were (i) original research, (ii) adult populations, (iii) a comparison between qSOFA and qSOFA combined with CRP, and (iv) set in a hospital environment. The same two reviewers independently extracted data into a pre-designed form and performed a risk of bias assessment using the Quality Assessment tool for Diagnostic Accuracy Studies version 2 (QUADAS-2). Disagreements were settled through discussion and a third reviewer was consulted if necessary. Our primary outcome is mortality.ResultsThree retrospective studies with a total of 1521 patients were included in the review. Adding CRP to qSOFA improved the Area Under the Receiver Operating Characteristic Curve (AUROC) value in all three studies by 3-10%. In the two studies with available data, the addition of CRP improved the sensitivity of qSOFA for mortality risk stratification by 43% and 71%, while decreasing the specificity by 12% and 7% respectively. The cut-off values of CRP ranged from 60 to 128.8mg/L across the three studies. A meta-analysis was not performed due to the heterogeneity across studies and the small sample size.ConclusionsThis comprehensive review provides initial evidence that combining CRP with qSOFA could improve the prognostic performance of qSOFA alone in identifying patients at risk of dying in hospital. The combined tool demonstrates potential to improve patient outcomes, especially in low resource settings. The review also reveals research gaps in this area.RegistrationPROSPERO registration No. CRD42020190973