Statistical analysis
We compared baseline characteristics by SCD group using chi square and t-test or ANOVA.
We calculated the period prevalence of CV testing by dividing the number of participants who had either an echocardiogram or stress test divided by the number of participants on each SCD risk category. We also calculated the odds ratio (OR) and corresponding 95% confidence interval (CI) stratified by age, gender, race and ethnicity.
Analyses were performed using STATA version 14 (College Station, Texas), and all significance tests were two-tailed.