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The Veterans Affairs COVID-19 (VACO) Index is a mortality prediction model derived from the Veterans Health Administration (VA) electronic health record database of > 13,000 COVID-19-positive veterans to predict 30-day all-cause mortality following a positive SARS-CoV-2 test. The VACO Index uses age, sex, and Elixhauser comorbidity index to produce an individualized 30-day mortality probability. It was designed to be rapidly calculable from existing clinical data and has been validated in non-Veterans populations including NIH National Patient-Centered Clinical Research Network (PCORnet) multicenter data. VACO Index calibrates across demographic groups better than age-alone models.
Age
Sex
Number of Serious Comorbidities (CHF, COPD, liver disease, diabetes with complications, malignancy, CKD, coagulopathy, obesity BMI ≥ 35, neurological disorder, severe lung disease)
Active Immunosuppression (organ transplant, stem cell transplant, active malignancy on chemotherapy, biologic therapy, corticosteroids > 10 mg/day prednisone equivalent)
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