The Medication Appropriateness Index (MAI) measures the appropriateness of prescribing for elderly patients, using 10 criteria for each medication prescribed. For each criterion, the evaluator rates whether the medication is appropriate, marginally appropriate, or in- appropriate.
Hanlon JT, Schmader KE, Samsa GP, et al. A method for assessing drug therapy appropriateness. J Clin Epidemiol. 1992 Oct;45(10):1045-51