HAS-BLED bleeding risk calculator. Base on the article in Chest. 2010;138(5):1093-1100. doi:10.1378/chest.10-0134. The calculator estimates one year risk of major bleeding when using warfarin in atrial fibrillation.

SOG's calculator has been designed with ease of use and clarity in mind. All selections are made on a single page and you can see the risk score and risk assessment change as you switch the options.