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Kaplan-Meier Plot of Cumulative Incidence of Total CHD Among Persons with CAC=0 at Baseline; p<.001 for log-rank test for equality of survivor function comparing those with any vs. no change in CAC. Numbers in parenthesis indicate the proportion of subjects in each group. Both imputed and nonimputed subjects are included. CAC=coronary artery calcium; CHD=coronary heart disease.
