Intention-to-Treat in Randomized Controlled Trials
"Intention-to-Treat" analysis in randomized controlled trials (RCTs) means that all study participants are analyzed in the same group they were randomly assigned to at the beginning of a study.
Use and Interpret Independent Samples t-tests in SPSS
Independent samples t-test is used to compare two groups on a continuous outcome. SPSS can be used to conduct assumptions and independent samples t-test.
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Use and Interpret ANOVA in SPSS
ANOVA is used to compare three or more groups on a normal continuous outcome. SPSS can be used to test the statistical assumptions as well as ANOVA.
Ordinal Outcomes Decrease Statistical Power and Increase The Needed Sample Size
Ordinal outcomes decrease statistical power and increase the needed sample size. This is because ordinal outcomes lack precision and accuracy.
Use and Interpret Mann-Whitney U When Homogeneity of Variance is Violated
Mann-Whitney U is used when the assumption of homogeneity of variance is violated for independent samples t-test. SPSS can be used to conduct Mann-Whitney U.
Appraising Randomized Controlled Trial Evidence for Empirical Benchmarks
When appraising random controlled trial evidence, there are certain benchmarks that have to be met: Random selection, random assignment, and intention-to-treat.