1 Sweeney, L. Guaranteeing Anonymity when Sharing Medical Data, the Datafly System. Masys, D., Ed. Proceedings, American Medical Informatics Association, Nashville, TN: Hanley & Belfus, Inc., 1997:51-55.
2 For example, validity is an indicator of how well a test measures the property or characteristic it is intended to measure and the reliability of a test, i.e., whether the same result is obtained each time the test is used. Validity is also a measurement of the accuracy with which a test predicts a clinical condition. Utility refers to the degree to which the results of test can be used to make decision about the subsequent delivery of health care.