A-DROP Score (JRS CAP Severity)
A-DROP score (Japanese Respiratory Society CAP severity) — a 0-5 count over Age (male >= 70 / female >= 75), Dehydration (BUN >= 21 mg/dL), Respiratory failure, Orientation disturbance, and low blood Pressure.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Age
- Yes
- Dehydration
- Yes
- Orientation disturbance
- Yes
Result: A-DROP 3 of 5 — severe (admission per source).
The tool opens with these values already filled in. Replace them with your own.
What the result means
- 0
- Mild — outpatient care per source.
- 1-2
- Moderate.
- 3
- Severe — admission per source.
- 4-5
- Extremely severe — consider ICU per source. A severity category, not an admission order.
What you enter
- Age (male >= 70 or female >= 75)
- Dehydration (BUN >= 21 mg/dL / 7.5 mmol/L)
- Respiratory failure (SpO2 <= 90% or PaO2 <= 60 mmHg)
- Orientation disturbance (new confusion)
- Low blood pressure (systolic <= 90 mmHg)
How this is calculated
Miyashita N, Matsushima T, Oka M; Japanese Respiratory Society. The JRS guidelines for the management of community-acquired pneumonia in adults. Intern Med. 2006;45(7):419-428. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.