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CHADS2 Stroke Risk Score

Global2001Atrial Fibrillation

Overview

Clinical prediction rule for estimating the risk of stroke in patients with non-rheumatic atrial fibrillation.

Clinical Use

Stroke risk assessment in atrial fibrillation

Risk Output

Annual stroke risk (%)

Risk Factors

Congestive Heart Failure
Hypertension
Age ≥75
Diabetes
Stroke/TIA History

Validation

Multiple atrial fibrillation cohorts

Limitations

Replaced by CHA2DS2-VASc in many guidelines

Clinical Guidelines

ACC/AHA Atrial Fibrillation Guidelines

Python Usage

class="operator"><span <span class="keyword">class</span>="import">from</span> cvd_risk <span <span class="keyword">class</span>="import">import</span> CHADS2, PatientData

patient class="operator">= PatientData(
    ageclass="operator">=<span class="number">75</span>,
    sexclass="operator">=<span <span class="keyword">class</span>="string">'male'</span>,
    congestive_heart_failureclass="operator">=<span class="keyword">True</span>,
    hypertensionclass="operator">=<span class="keyword">True</span>,
    diabetesclass="operator">=<span class="keyword">True</span>,
    stroke_historyclass="operator">=<span class="keyword">False</span>
class="bracket">)

model class="operator">= CHADS2()
result class="operator">= model.<span class="function">calculate</span>(patient)
class="operator"><span class="function">print</span>(f<span <span class="keyword">class</span>="string">"Annual stroke risk: {result.risk_score:.1f}%"</span>)

Model Information

Model Name:

CHADS2

Publication Year:

2001

Region:

Global

Category:

Atrial Fibrillation