Sudden death score
The SCD score is race based and includes commonly collected variables from primary care encounters. The accuracy of the score is high (c-statistic of 0.82;95% CI 0.79-0.86). 7
The score formula is:
SCD score for Whites 1-0.99538 exp (∑β-8.19637)   and SCD score for Blacks 1-0.99135 exp (∑β-6.08333)
We used primary care encounter data to calculate the SCD score and divided the score by deciles. We classified patients as high risk if they were in deciles 9 or 10, all others were considered intermediate risk (deciles 5-8) and low risk (decile 1-4).7 These cutoffs have been previously used and are based on the exponential SCD risk profile seen in ARIC and Framingham.7, 8