1. THE COMMONWEALTH FUND Source: McCarthy and Leatherman, Performance Snapshots, 2006. www.cmwf.org/snapshots Most Frequently Reported Types of Medication Errors: Voluntary Reporting System, 2000–2004 (Percentage of Reports with an Error Type) Data: Santell, J.P. et al. 2005. MedMarx Data Report. USP Center for the Advance- ment of Patient Safety. © 2005 The United States Pharmacopeial Convention, Inc. All rights reserved. *Failure to administer an ordered drug dose.

2. THE COMMONWEALTH FUND Source: McCarthy and Leatherman, Performance Snapshots, 2006. www.cmwf.org/snapshots Types of Reported Medication Errors That Most Frequently Caused Harm: Voluntary Reporting System, 2000–2004 (Percentage That Involved Patient Harm) Data: Santell, J.P. et al. 2005. MedMarx Data Report. USP Center for the Advance- ment of Patient Safety. © 2005 The United States Pharmacopeial Convention, Inc. All rights reserved. *Failure to administer an ordered drug dose. Overall, about 1.7 percent of reported errors involved patient harm.

3. THE COMMONWEALTH FUND Source: McCarthy and Leatherman, Performance Snapshots, 2006. www.cmwf.org/snapshots Most Frequently Reported Causes of Medication Errors: Voluntary Reporting System, 2000–2004 (Percentage of Reports with a Cited Cause) Data: Santell, J.P. et al. 2005. MedMarx Data Report. USP Center for the Advance- ment of Patient Safety. © 2005 The United States Pharmacopeial Convention, Inc. All rights reserved. *Failure to act in accordance with education and training.