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Ratio

A ratio is a score that is derived by dividing a count of one type of data by a count of another type of data. For example, the number of patients with central lines who develop infection divided by the number of central line days. The key to the definition of a ratio is that the numerator is not in the denominator.

Reliability subcriterion (Scientific Acceptability of the measures properties subcriterion)

The Reliability subcriterion tests whether the measure is well defined and precisely specified so that it can be implemented consistently within and across organizations and allow for comparability. Source: National Quality Forum. (2019). Measure Evaluation Criteria and Guidance for Evaluating Measures for Endorsement.

Resource use measure

A resource use measure, also called a cost and resource use measure, is a measure of health services counts (in terms of units or dollars) applied to a population or event (including diagnoses, procedures, or encounters). A resource use measure counts the frequency of use of defined health system resources. Some may further apply a dollar amount (e.g., allowable charges, paid amounts, or standardized prices) to each unit of resource use.

Respecified measure

A respecified measure is an existing measure that is changed to fit the current purpose or use. This may mean changing a measure to meet the needs of a different care setting, data source, or population. Or, it may mean changes to the numerator, denominator, or adding specifications to fit the current use.