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Prospective validation of an 11-gene mRNA host response score for mortality risk stratification in the intensive care unit.
Prospective validation of an 11-gene mRNA host response score for mortality risk stratification in the intensive care unit. Scientific reports Moore, A. R., Roque, J., Shaller, B. T., Asuni, T., Remmel, M., Rawling, D., Liesenfeld, O., Khatri, P., Wilson, J. G., Levitt, J. E., Sweeney, T. E., Rogers, A. J. 2021; 11 (1): 13062Abstract
Several clinical calculators predict intensive care unit (ICU) mortality, however these are cumbersome and often require 24h of data to calculate. Retrospective studies have demonstrated the utility of whole blood transcriptomic analysis in predicting mortality. In this study, we tested prospective validation of an 11-gene messenger RNA (mRNA) score in an ICU population. Whole blood mRNA from 70 subjects in the Stanford ICU Biobank with samples collected within 24h of Emergency Department presentation were used to calculate an 11-gene mRNA score. We found that the 11-gene score was highly associated with 60-day mortality, with an area under the receiver operating characteristic curve of 0.68 in all patients, 0.77 in shock patients, and 0.98 in patients whose primary determinant of prognosis was acute illness. Subjects with the highest quartile of mRNA scores were more likely to die in hospital (40% vs 7%, p<0.01) and within 60days (40% vs 15%, p=0.06). The 11-gene score improved prognostication with a categorical Net Reclassification Improvement index of 0.37 (p=0.03) and an Integrated Discrimination Improvement index of 0.07 (p=0.02) when combined with Simplified Acute Physiology Score 3 or Acute Physiology and Chronic Health Evaluation II score. The test performed poorly in the 95 independent samples collected>24h after emergency department presentation. Tests will target a 30-min turnaround time, allowing for rapid results early in admission. Moving forward, this test may provide valuable real-time prognostic information to improve triage decisions and allow for enrichment of clinical trials.
View details for DOI 10.1038/s41598-021-91201-7
View details for PubMedID 34158514