🪨 STONE Score (Ureteral Stone Probability)
Predict an uncomplicated ureteral stone with the STONE score.
Clinical takeaway
0–5 low, 6–9 moderate, 10–13 high.
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When to use
Estimate stone probability in acute flank pain.
How it works
Sex (male 2), Timing (< 6 h 3 / 6–24 h 1), Origin/race (non-black 3), Nausea (vomiting 2 / nausea 1), Erythrocytes/haematuria (3). 0–13.
Key points
- 0–5 low, 6–9 moderate, 10–13 high.
- High scores may reduce immediate CT use.
- Stay alert for serious mimics (AAA, pyelonephritis).
References
Decision support for licensed clinicians only; not a substitute for clinical judgement, diagnosis or local protocols.
Worked calculation
The values below come from this tool's own example placeholders and are computed server-side with the formula shown on this page, so the arithmetic can be checked quickly. It demonstrates how to substitute values only — it is not clinical advice and not a real case.
| Sex | Female (0) |
|---|---|
| Duration of pain | < 6 h (3) |
| Race | Non-black (3) |
| Nausea/vomiting | None (0) |
| Microscopic haematuria | Absent (0) |
→STONE6/13
- Probability of stone：Moderate probability
- Note：Consider imaging and look for alternative diagnoses.
| Sex | Male (2) |
|---|---|
| Duration of pain | > 24 h (0) |
| Race | Black (0) |
| Nausea/vomiting | Vomiting (2) |
| Microscopic haematuria | Present (3) |
→STONE7/13
- Probability of stone：Moderate probability
- Note：Consider imaging and look for alternative diagnoses.
Frequently asked questions
- What is STONE Score (Ureteral Stone Probability)?
- Predict an uncomplicated ureteral stone with the STONE score.
- How is STONE Score (Ureteral Stone Probability) calculated? What is the core formula?
- Sex (male 2), Timing (< 6 h 3 / 6–24 h 1), Origin/race (non-black 3), Nausea (vomiting 2 / nausea 1), Erythrocytes/haematuria (3). 0–13.
- When is STONE Score (Ureteral Stone Probability) used?
- Estimate stone probability in acute flank pain.
- What are the key clinical points for STONE Score (Ureteral Stone Probability)?
- 0–5 low, 6–9 moderate, 10–13 high. High scores may reduce immediate CT use. Stay alert for serious mimics (AAA, pyelonephritis).
- What are the limits and cautions when using STONE Score (Ureteral Stone Probability)?
- For licensed clinicians and clinical researchers. Interpret results with history, investigations and local protocols; not a diagnosis or prescription, and not a substitute for multidisciplinary decision-making or local guidelines.
- How is STONE Score (Ureteral Stone Probability) calculated in practice? Can you show a worked example?
- Inputs: Sex Female (0), Duration of pain < 6 h (3), Race Non-black (3), Nausea/vomiting None (0), Microscopic haematuria Absent (0) → Result: STONE 6 /13（Probability of stone: Moderate probability, Note: Consider imaging and look for alternative diagnoses.） Inputs: Sex Male (2), Duration of pain > 24 h (0), Race Black (0), Nausea/vomiting Vomiting (2), Microscopic haematuria Present (3) → Result: STONE 7 /13（Probability of stone: Moderate probability, Note: Consider imaging and look for alternative diagnoses.）