What are the limitations of the gapss score?

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

How does the gapss score compare to other hematology scores?

The gapss 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 gapss score free to use?

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

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GAPSS (Global APS Score)

Global APS Risk: Higher scores correlate with increased hazard of arterial/venous thrombosis. Patients with "Triple Positivity" (LA+aCL+β2GPI) carry the highest risk profile (GAPSS 13).

Risk Criteria Checklist

Cumulative APS Risk Score

0

Select patient factors to calculate the global thrombosis risk score.

Guidelines & Evidence

Clinical Details

Section 1

When to Use

Assessing the risk of thrombosis (arterial or venous) and pregnancy loss in patients with Antiphospholipid Antibodies (aPL).

Quantifying the "global" risk by integrating traditional cardiovascular risk factors with the aPL profile.

Guiding the intensity of primary prophylaxis (e.g., low-dose aspirin).

Target Population

Patients who test positive for aPL on at least two occasions 12 weeks apart.

Section 2

Formula & Logic

Criteria Weighted Points

Criterion	Points
Hyperlipidaemia	3
Hypertension	1
Anticardiolipin (aCL) IgG/IgM	5
Anti-β2-glycoprotein I (aβ2GPI) IgG/IgM	4
Lupus Anticoagulant (LA)	4
Anti-phosphatidylserine/prothrombin (aPS/PT) IgG/IgM	3

Interpretation

Scores range from 0 to 20. Higher scores indicate a progressively higher cumulative risk of thromboembolic events.

Section 3

Pearls/Pitfalls

Triple Positivity

The "Triple Positive" profile (LA + aCL + aβ2GPI) automatically results in a high GAPSS score (13 pts) and carries the highest risk for recurrent thrombosis. These patients often require robust lifelong anticoagulation.

Aspirin Pivot

Patients with GAPSS ≥ 10 are often considered for primary prophylaxis with low-dose aspirin even in the absence of a prior event, especially if multiple modern aPL antibodies (like aPS/PT) are present.

Section 4

Evidence Appraisal

Primary Score

The Global Anti-Phospholipid Syndrome Score (GAPSS).

Sciascia S et al. • Rheumatology. 2013;52(8):1397-403.

View Source

Validation of the Global Anti-Phospholipid Syndrome Score (GAPSS) in an internal cohort.

Sciascia S et al. • Annals of the Rheumatic Diseases. 2013;Clinical utility for risk prediction.

View Source

Section 5

Literature

Development

Developed to move beyond simple "positive/negative" testing toward a comprehensive risk-management framework for APS.

Last Comprehensive Review: 2026

Related Hematology Tools

Revised Geneva Score

PERC Rule

YEARS Algorithm

Age-adjusted D-dimer Threshold

sPESI

HEP Score

HERDOO2 Rule

Vienna Prediction Model

Padua RAM

Antiphospholipid Syndrome Classification

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