Cancer history as a predictor in cardiovascular risk scores: a primary care cohort study

Background Cardiovascular risks are raised in cancer survivors but cancer history is not included in cardiovascular risk scores that inform preventive decisions. Aim To assess whether cancer diagnosis should be included in cardiovascular risk scores. Design and setting Cohort study using data from English general practices linked to hospital, cancer registration, and death registration data from 1990 to 2015. Method Adults alive 1 year after a first cancer diagnosis and age, sex, general practice, and calendar- time matched cancer-free individuals were included. Individuals with 10% relative difference with P Results In total, 81 420 cancer survivors and 413 547 cancer-free individuals were followed for a median 5.2 years (interquartile range [IQR] 2.8– 9.1) and 6.3 years (IQR 3.5–10.2), respectively. Including a 1-year cancer survivorship variable in a QRISK3-based model met the threshold for inclusion for males (independent hazard ratio [iHR] 1.16, 95% confidence interval [CI] = 1.11 to 1.20, P Conclusion Developers should consider including cancer history variables in future cardiovascular risk models.