Appendix Table 5.

HEDIS Drugs to Avoid in the Elderly Numerator (≥1 High-Risk Medication) Agreement for Persons Aged ≥65 Years With 12 Continuous Months of Enrollment in a Single Medicare Advantage Plan and 12 Months of Part D Benefit in 2007 That Were Included in the Measure Denominator by Both Sources^*

Variable	Reported to HEDIS
	No High-Risk Drug Use, n (%)	High-Risk Drug Use, n (%)	Total
No high-risk drug use	54 382 (71.7)	1429 (1.9)
High-risk drug use	4226 (5.6)	15 781 (20.8)
Total			75 818

HEDIS = Healthcare Effectiveness Data and Information Set.

^*The McNemar test of marginal homogeneity: P < 0.001. Data in the rows are calculated from the Health Outcomes Study.