Receiver operating characteristic curves for the LASSO time-to-VTE prediction model across all 3 cohorts. (A) Kaplan-Meier curves of all 3 cohorts pooled together, stratified by low vs high risk, as defined by the prediction model. (B) NMH discovery cohort. (C) Duke validation cohort. (D) UCLA validation cohort. AUC, area under the curve; FP, false positive; TP, true positive.