Historical-Clinical-Risk Management-20, Version 3 (HCR-20 ^V3 ): Development and Overview

The HCR-20 Version 3 (HCR-20 V3 ) was published in 2013, after several years of development and revision work. It replaces Version 2, published in 1997, on which there have been more than 200 disseminations based on more than 33,000 cases across 25 countries. This article explains (1) why a revision was necessary, (2) the steps we took in the revision process, (3) key changes between Version 2 and Version 3, and (4) an overview of HCR-20 V3 's risk factors and administration steps. Recommendations for evaluating Version 3 are provided.