accuracy

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ac·cur·a·cy

(ak'kū-ră-sē), Do not confuse this word with precision.
The degree to which a measurement, or an estimate based on measurements, represents the true value of the attribute being measured. In the laboratory, accuracy of a test is determined when possible by comparing results from the test in question with results generated using reference standards or an established reference method.

accuracy

The degree to which, on average, a test represents the true value—i.e., is unbiased.

Lab medicine
The extent to which a value from a test reflects or agrees with the reference value of the analyte being tested, measured statistically by standard deviations; the proportion of correct outcomes of a method (often used interchangeably with concordance in two-by-two tables).

Accuracy is insufficient for describing the performance of medical tests and deciding when to use what, because accuracy has two separate components and depends on the prevalence of the condition for which the test is appropriate. The degree of reproducibility of test results, regardless of whether or not they are accurate, are measured statistically by the coefficient of variation; the degree to which a measurement (e.g., the mean estimate of a treatment effect) is true or correct. An estimate can be accurate, yet not be precise, if it is based upon an unbiased method that provides observations having great variation—i.e., not close in magnitude to each other.

accuracy

Lab medicine The extent to which a value from a test reflects or agrees with the reference value of the analyte being tested, measured statistically by standard deviations; the proportion of correct outcomes of a method–often used interchangeably with concordance. See Coefficient of variation, Diagnostic accuracy, Inaccuracy, Two-by-two table. Cf Precision.

ac·cur·a·cy

(ak'kyūr-ă-sē)
The degree to which a measurement represents the true value of the attribute that is being measured; refers to the closeness of an analytic result to an actual result.
References in periodicals archive ?
The higher imputation accuracies obtained here for the combined family- and population-based algorithms than for population-based algorithm were in agreement with previous studies in various dairy cattle populations.
This algorithm likely helped FImpute compute genomic relationships more accurately resulting in higher imputation accuracies than Findhap in this population.
Accuracies to [+ or -] 0.25% deviation from setpoint and [+ or -]0.5% repeatability at 2[sigma]
Transducers available in accuracies of 0.5% or 1.0%, stem lengths of 3.5, 6 or 12 in., and pressure ranges from 500 to 20,000 psi.
Accuracies to [+ or -]0.25% deviation from set-point and [+ or -]0.5% repeatability at 2E.
Unit combines up to eight ingredients with accuracies on both major and minor ingredients of [+ or -]0.25%.
Pressure-transducer instruments are available in accuracies of 0.5% or 1.0%, have stem lengths of 3.5, 6 or 12 in., and pressure ranges from 500 to 20,000 psi.

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