Emergency Medicine · Infectious Disease
PRIEST COVID-19 Clinical Severity Score calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Allowed range: 0–80 /min
Allowed range: 0–100 %
Allowed range: 0–250 /min
Allowed range: 0–300 mm Hg
Allowed range: 77–113 °F
Allowed range: 0–120 years
Ages 16 to 49 score 0, 50 to 65 score 2, 66 to 80 score 3, and above 80 scores 4. Under 16 years is not scored.
Result
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Clinical inputs
- Respiratory rate (/min)Accepted range: 0 to 80
- Oxygen saturation (%)Accepted range: 0 to 100
- Heart rate (/min)Accepted range: 0 to 250
- Systolic blood pressure (mm Hg)Accepted range: 0 to 300
- Temperature (°C)Accepted range: 25 to 45
- Alertness
- Inspired oxygen
- Sex
- Age (years)Accepted range: 0 to 120
- Performance status
Primary source
Goodacre S et al. Derivation and validation of a clinical severity score for acutely ill adults with suspected COVID-19: The PRIEST observational cohort study. PLoS One. DOI: 10.1371/journal.pone.0245840. PMID: 33481930. Figure 2 assigns respiratory rate 12–20 as 0, 9–11 as 1, 21–24 as 2, and below 9 or above 24 as 3; oxygen saturation above 95 as 0, 94–95 as 1, 92–93 as 2, and below 92 as 3; heart rate 51–90 as 0, 41–50 or 91–110 as 1, 111–130 as 2, and below 41 or above 130 as 3; systolic pressure 111–219 as 0, 101–110 as 1, 91–100 as 2, and below 91 or above 219 as 3; temperature 36.1–38.0 as 0, 35.1–36.0 or 38.1–39.0 as 1, above 39.0 as 2, and below 35.1 as 3; alert as 0 and confused or not alert as 3; air as 0 and supplemental oxygen as 2; female as 0 and male as 1; age 16–49 as 0, 50–65 as 2, 66–80 as 3, and above 80 as 4; performance status 0 through 4. A score above 4 predicted death or organ support with sensitivity 0.98 in the validation cohort. (2021)
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