by Sophie Lekkerkerker, Karin A. H. Kaasjager, Saskia Haitjema, Cornelia Hulsbergen-Veelken, Karin H. Herbschleb, Marianne C. Verhaar, Meriem Khairoun, Gurbey Ocak
BackgroundAlthough immune checkpoint inhibitors improve survival in patients with malignancies, a substantial number of patients treated with these agents experience immune-related adverse events. It is unknown whether inflammation-related hematological ratios are associated with immune-related adverse events or mortality.
ObjectiveWe aimed to investigate the association between pretreatment inflammation-related hematological ratios and the occurrence of immune-related adverse events and mortality in patients receiving checkpoint inhibitors.
MethodsPatients treated with checkpoint inhibitors within a tertiary hospital in the Netherlands were studied using routine care data between January 2013 and May 2020. Cox regression analysis was performed to assess the association between neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), neutrophil-to-lymphocytes and platelets ratio (NLPR), and systemic immune-inflammation index (SII) and outcomes (immune-related adverse events or mortality).
ResultsAmong 664 patients treated with checkpoint inhibitors, 397 (59.8%) patients developed an immune-related adverse event and 363 (54.7%) patients died during a median follow-up period of 17 months (interquartile range 7–30 months). Hematological ratios were not associated with immune-related adverse events. However, highest tertiles as compared with lowest tertiles of all hematological ratios were independently associated with mortality (NLR: adjusted hazard ratio (HR) 2.23, 95% CI 1.69–2.95; PLR: adjusted HR 1.88, 95% CI 1.43–2.47; NLPR: adjusted 1.59, 95% CI 1.22–2.06; SII: adjusted HR 2.33, 95% CI 1.77–3.08).
ConclusionIn this study, pretreatment inflammation-based hematological ratios were not associated with future immune-related adverse events in patients treated with checkpoint inhibitors. However, elevated hematological ratios were associated with an increased mortality risk.
Rapid identification of high-risk and low-risk patients presenting to the emergency department (ED) influences clinical management and can help optimise patient outcomes as well as resource allocation. This study aims to externally validate the Risk Stratification in the Emergency Department in Acutely Ill Older Patients (RISE UP) score in adult patients in the ED with suspected infection. Furthermore, generalisability was assessed by comparing the discriminatory ability of the RISE UP with the quick Sequential Organ Failure Assessment (qSOFA) as well as the Modified Early Warning Score (MEWS) and National Early Warning Score (NEWS).
Retrospective cohort study.
Single-centre study in the ED of a tertiary, university-affiliated hospital.
Adult patients with suspected infection presenting at the ED for internal medicine from 2016 to 2022.
The primary outcome was all-cause 30-day mortality. Secondary outcomes were all-cause 14-day mortality, 7-day mortality and intensive care unit (ICU) admission.
Prognostic performance was evaluated using discrimination (area under the receiver operating characteristic curve (AUC)) and a calibration plot.
Of the included 5038 ED visits, there was a 30-day mortality of 7.1%. Discrimination of RISE UP for 30-day mortality was good (AUC 0.809; 95% CI 0.786 to 0.832) and significantly higher than that for the other risk scores: qSOFA (AUC 0.675; 95% CI 0.644 to 0.707), MEWS (AUC 0.688; 95% CI 0.658 to 0.718) and NEWS (AUC 0.725; 95% CI 0.696 to 0.754) (p
The RISE UP score outperformed the qSOFA, MEWS and NEWS in predicting 30-day mortality. It is generalisable to an adult infection-specific cohort and may facilitate distinction between high-risk and low-risk patients in the ED, particularly to rule out poor outcomes.