Observation values used to indicate the type of scoring (e.g. proportion, ratio) used by a health quality measure.

A measure in which either short-term cross-section or long-term longitudinal analysis is performed over a group of subjects defined by a set of common properties or defining characteristics (e.g., Male smokers between the ages of 40 and 50 years, exposure to treatment, exposure duration).

A measure score in which each individual value for the measure can fall anywhere along a continuous scale (e.g., mean time to thrombolytics which aggregates the time in minutes from a case presenting with chest pain to the time of administration of thrombolytics).

A score derived by dividing the number of cases that meet a criterion for quality (the numerator) by the number of eligible cases within a given time frame (the denominator) where the numerator cases are a subset of the denominator cases (e.g., percentage of eligible women with a mammogram performed in the last year).

A score that may have a value of zero or greater that is derived by dividing a count of one type of data by a count of another type of data (e.g., the number of patients with central lines who develop infection divided by the number of central line days).