Comput Methods Programs Biomed - Estimation of coefficients of individual agreement (CIAs) for quantitative and binary data using SAS and R.

Tópicos

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Resumo

The coefficients of individual agreement (CIAs), which are based on the ratio of the intra- and inter-observer disagreement, provide a general approach for evaluating agreement between two fixed methods of measurements or human observers. In this paper, programs in both SAS and R are presented for estimation of the CIAs between two observers with quantitative or binary measurements. A detailed illustration of the computations, macro variable definitions, input and output for the SAS and R programs are also included in the text. The programs provide estimations of CIAs, their standard errors as well as confidence intervals, for the cases with or without a reference method. Data from a carotid stenosis screening study is used as an example of quantitative measurements. Data from a study involving the evaluation of mammograms by ten radiologists is used to illustrate a binary data example.

Resumo Limpo

coeffici individu agreement cia base ratio intra interobserv disagr provid general approach evalu agreement two fix method measur human observ paper program sas r present estim cia two observ quantit binari measur detail illustr comput macro variabl definit input output sas r program also includ text program provid estim cia standard error well confid interv case without refer method data carotid stenosi screen studi use exampl quantit measur data studi involv evalu mammogram ten radiologist use illustr binari data exampl

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