Appendix Table 2. 10-Year AF Risk Discrimination, by Age^*

Model	C-Statistic at 10-y Follow-Up
	Age <71 y (n = 629)	Age ≥71 y (n = 631)	P Value*	Age <75 y (n = 942)	Age ≥75 y (n = 318)	P Value†
Framingham	0.71	0.57	<0.001	0.67	0.58	0.012
PAC	0.72	0.66	0.070	0.69	0.66	0.46
Framingham and PAC	0.81	0.67	<0.001	0.75	0.66	0.013

AF = atrial fibrillation; PAC = premature atrial contraction.

^*Cohort stratified by 50th and 75th age percentiles (71 and 75 y, respectively).

^†For comparison of c-statistic between age strata in each model.