Feature
Health risk tools
Doctors use published scores to sort people into broad risk groups. These pages explain them plainly so you can bring better questions to your visit. They help you prepare for a conversation; they don’t replace one.
Educational only, not a diagnosis. Educational information about published risk tools. Not medical advice or a diagnosis, and it does not create a doctor–patient relationship. Do not start, stop, or change any medication, including blood thinners, without your clinician. Everything you enter stays in this browser; nothing is sent anywhere. In an emergency, call 911.
CHA₂DS₂-VASc / CHA₂DS₂-VA
Stroke risk in atrial fibrillation. Interactive score with the 2024 European sex-neutral version alongside.
HAS-BLED
Bleeding risk in atrial fibrillation. Interactive score focused on what can be fixed.
AHA PREVENT™ explained
Heart-risk bands, what the score leaves out, and a checklist for the official calculator.
Get ready for FRAX
Fracture-risk checklist and a link to the official calculator. We do not calculate FRAX.
STOP-BANG
Sleep apnea screening from the book (Part 8, Q110).