Baseline characteristics
Figure 1 of the supplementary appendix shows the flow chart of included patients. We included a total of 36,885 patients without known heart disease from both institutions with a median SCD score of 9% (IQR 3.5-22). Table 1 shows the baseline characteristics by SCD risk category. For both institutions those in the highest deciles of SCD risk were older, more likely to be male, and more likely to have cardiovascular risk factors (p<0.01). Our random sample had 100% accuracy of the CV risk factors, CV diseases and CV procedures when compared to the medical record. Those in the highest SCD risk had a 7% mortality rate compared to 6% in the intermediate risk and 5% in low SCD risk.