The estimation of standardized Cronbach's α for a scale with dichotomous items can be improved by using the upper bound of coefficient ϕ. SAS and SPSS macros have been developed in this article to obtain standardized Cronbach's α via this method. The simulation analysis showed that Cronbach...
In this paper, a SAS macro is provided to calculate the ICC and its confidence limits. The application of the macro is demonstrated in a clinical reliability case study, the comparison of two ICCs is discussed.被引量: 82 年份: 2007
The Center for Medicare &Medicaid Services (CMS) uses the Proportion of Days Covered (PDC) tomeasure medication adherence among their beneficiaries. There is also some PDC-related researchbased on Medicare Part D Event (PDE) Data. However, "Under Medicare rules, beneficiaries who receive care at...
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Calculate power in SAS. Calculate power in PASS. Power analysis A power analysis is a calculation that helps determine the smallest sample size required for your study. This analysis consists of four main elements. If you have knowledge or estimates of any three, you can calculate the fourth ...
For most of the sample size procedures in PASS for proportions, the user may choose to solve for sample size, power, or the population effect size in some manner. In a typical proportion test procedure where the goal is to estimate the sample size, the user enters power, alpha, and the...
I have written a SAS(R) macro to calculate exact confidence intervals for the difference of two proportions based on an algorithm previously only implemented in FORTRAN (Coe and Tamhane 1993). I have also written a SAS(R) macro to calculate exact confidence intervals for a single proportion. ...
After an extensive review of methods applied in pharmacy relatedadministrative databases, we found that Medication Possession Ratio (MPR) and Proportion Days Covered (PDC) are the two most common measurements used in pharmacoepidemiological and pharmacoeconomic studies and are also recommended by the ...
Dichotomous responses from matched pairs of data at different timepoints are often displayed in 2 by 2 tables, and McNemar's test is performed to test the hypothesis that the proportion of subjects with a certain response is equivalent at both timepoints. A kappa statistic can determine the ...