What are the limitations of the phases score?

While the phases score is highly validated, it should not replace clinical judgment. OpiCalc provides the latest evidence-based limitations for the phases score to ensure safe bedside use and optimal diagnostic accuracy.

How does the phases score compare to other Neurology scores?

The phases score is a gold-standard diagnostic tool. OpiCalc provides side-by-side clinical guidance to help clinicians choose the most specific evidence-based tool for their patient's presentation.

Is the phases score free to use?

Yes. OpiCalc provides the phases score completely ad-free and optimized for mobile bedside use, ensuring you can calculate medical risk swiftly and without distraction.

PHASES Score

PHASES Score Calculator

5-Year Aneurysm Rupture Risk Assessment

Population

Hypertension

Age

Size of Aneurysm

Earlier SAH

Site of Aneurysm

Total Score: 0

5-Year Rupture Risk: 0.4%

Low Risk

Clinical Recommendations

• Score ≤2: Consider conservative management with regular monitoring

• Score 3-6: Individual risk assessment needed; consider patient factors

• Score 7-11: Consider intervention based on patient factors

• Score ≥12: Strong consideration for intervention

Validated only in North American, European, Japanese, and Finnish populations. Use clinical judgment in conjunction with score results.

EVIDENCE SYNTHESIS

Clinical Reference Hub

Curated insights • How it Works • Practical Pearls • Evidence Base