COVID-GRAM Critical Illness Risk Score
COVID-GRAM critical-illness risk (Liang 2020): a published logistic model from X-ray abnormality, age, hemoptysis, dyspnea, unconsciousness, comorbidity count, cancer, NLR, LDH, and direct bilirubin.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Chest X-ray abnormality
- No
- Age
- 50
- Hemoptysis
- No
- Dyspnea
- No
- Unconsciousness
- No
- Number of comorbidities
- 0
- History of cancer
- No
- Neutrophil-to-lymphocyte ratio
- 3
- LDH
- 300
- Direct bilirubin
- 5
Result: COVID-GRAM estimated probability of critical illness ~1.9% (published logistic model; betas derived as ln of the reported odds ratios, intercept from the paper's rounded constant -- treat the absolute value as approximate). The authors define no low/medium/high cut-points.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Probability
- Higher predicted probability indicates greater critical-illness risk; the authors deliberately defined no risk-tier cut-points.
What you enter
- Chest X-ray abnormality
- Age (years)
- Hemoptysis
- Dyspnea
- Unconsciousness
- Number of comorbidities
- History of cancer
- Neutrophil-to-lymphocyte ratio
- LDH (U/L)
- Direct bilirubin (µmol/L)
How this is calculated
Liang W, Liang H, Ou L, et al. Development and validation of a clinical risk score to predict the occurrence of critical illness in hospitalized patients with COVID-19. JAMA Intern Med. 2020;180(8):1081-1089. Betas = ln of the published odds ratios. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.