Table 2.

Sample Selection Summary

	Observations
Initial n	163,536
Left the United States or entered 9 Medicare Advantage plan prior to baseline	−23,889
Younger than 68 at baseline	−65,503
Had no Part D record for any of the study drugs	−2,611
Final sample size	71,533
Additional outcome specific restrictions
Initial n	71,533
Had congestive heart failure prior to baseline	−17,086
Had acute myocardial infarction prior to baseline	−1,594
Had Stroke/TIA prior to baseline	−2,460
Final congestive heart failure sample size	54,447
Final acute myocardial infarction sample size	69,939
Final Stroke/TIA sample size	69,073

Note. Stroke/TIA = stroke/transient ischemic attack.