extremal quotient

extremal quotient

the ratio of the rate in the jurisdiction with the highest rate of interventions (for example, surgical procedures) to the rate in the jurisdiction with the lowest rate.

ex·tre·mal quo·tient

(eks-trē'măl kwō'shĕnt)
The ratio of the rate in the jurisdiction with the highest rate of interventions, such as surgical procedures, to the rate in the jurisdiction with the lowest rate.
References in periodicals archive ?
Specifically, Table 3 presents the mean resource use across patient panels, the coefficient of variation of this measure across the practices, the lowest and highest rate of average resource use across the cohort of providers, and the "extremal quotient," as calculated by dividing the "high" provider's patient panel mean, by the "low" provider's mean (Diehr et al.
As in the previous tables, when resource use is case mix-adjusted, the variation across practices - as measured by the extremal quotient - is lower when the unadjusted measure is compared.
Ambulatory care practice variation within a Medicaid program
"The Extremal Quotient in Small-Area Analysis." Health Services Research 24, no.
Suggested statistical tests include those based on logistic regression, coefficients of variation, extremal quotients, and chi-square tests (Kazandjian, Durance, and Schork 1989; Diehr et al.
Analysis of variations in mortality rates with small numbers
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