Many different CVD risk scoring systems have been developed. QRISK® Lifetime has been chosen as the basis for the JBS3 risk calculator as it provides the option of a calculation of lifetime risk and is based on a UK population. However, all risk assessment systems have limitations in the factors that can be included and the broad assumptions that are made, and so any numerical risk calculation must necessarily be interpreted in the light of the specific circumstances.

The data collected is based on the requirements of QRISK® Lifetime http://www.qrisk.org/lifetime/