Scoliosis Cobb Angle & Progression Risk — free guideline decision tool
Enter the Cobb angle, optionally Risser grade, age and prior Cobb angle: severity, management direction, Lonstein-Carlson progression factor and whether change exceeds measurement error (≥ 5°). Includes how to measure and what each value means. Instant, browser-side.
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
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.
| Risser grade (iliac apophysis) | 2 |
|---|---|
| Age | 12 years |
| Prior Cobb angle (same end vertebrae) | 22 ° |
| Cobb angle | 28 ° |
→Cobb angle28°
- Cobb angle：28 ° → 25–45°: moderate — brace if still growing (Risser 0–2)
- Lonstein-Carlson progression factor：(28 − 3×2) / 12 = 1.83; higher means greater risk, ≥ 1.4 suggests high risk
- Bracing：Meets common SRS bracing criteria (age ≥ 10, Risser 0–2, Cobb 25–40°)
Common questions
What is Scoliosis Cobb Angle & Progression Risk?
Enter the Cobb angle, optionally Risser grade, age and prior Cobb angle: severity, management direction, Lonstein-Carlson progression factor and whether change exceeds measurement error (≥ 5°). Includes how to measure and what each value means. Instant, browser-side.
How is Scoliosis Cobb Angle & Progression Risk calculated? What is the core formula?
Cobb angle < 10°: spinal asymmetry, not scoliosis Cobb angle 10–25°: mild — observe; repeat every 4–6 months while growing Cobb angle 25–45°: moderate — brace if still growing (Risser 0–2) Cobb angle ≥ 45°: severe — surgical evaluation (curves > 50° may progress ~1°/yr in adults)
When is Scoliosis Cobb Angle & Progression Risk used?
Spine imaging: standing full-spine films, flexion/extension views, CT/MRI — scoliosis follow-up, adult deformity, stenosis reporting and surgical planning.
What are the key clinical points for Scoliosis Cobb Angle & Progression Risk?
Standing full-spine PA radiograph. Each value is graded against published reference ranges. Measurement technique and positioning change the numbers — compare like with like on follow-up. Part of the YuanDoctor MSK measurement topic.
What are the limits and cautions when using Scoliosis Cobb Angle & Progression Risk?
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.
Does Scoliosis Cobb Angle & Progression Risk upload patient data? Where is it calculated?
Calculation runs locally in the browser; inputs and results are not uploaded. For licensed clinicians only; interpret with history, investigations and local protocols — not a diagnosis or prescription.
How is Scoliosis Cobb Angle & Progression Risk calculated in practice? Can you show a worked example?
Inputs: Risser grade (iliac apophysis) 2, Age 12 years, Prior Cobb angle (same end vertebrae) 22 °, Cobb angle 28 ° → Result: Cobb angle 28 °（Cobb angle: 28 ° → 25–45°: moderate — brace if still growing (Risser 0–2), Lonstein-Carlson progression factor: (28 − 3×2) / 12 = 1.83; higher means greater risk, ≥ 1.4 suggests high risk, Bracing: Meets common SRS bracing criteria (age ≥ 10, Risser 0–2, Cobb 25–40°)）
Run Scoliosis Cobb Angle & Progression Risk now
Enter the Cobb angle, optionally Risser grade, age and prior Cobb angle: severity, management direction, Lonstein-Carlson progression factor and whether change exceeds measurement error (≥ 5°). Includes how to measure and what each value means. Instant, browser-side.
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.
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