1. A

    Sample Size calculation - "difference in mean differences"

    We have two independent patient groups in an Individual RCT ("treatment" and control["standard care"]). The treatments will result in a change of scores on a psychometric scale, from baseline to end-line. A baseline assessment was conducted using this scale, and thereafter, the participants were...
  2. T

    Subgroup based on baseline of dependend variable?

    Hello everybody, I am currently working on a study with heart patients. I have no data yet but am trying to write up my methodology and am currently thinking about how to do the statistics to evaluate my hypothesis. I am a bloody beginner in regards to statistic and would be thankful for any...
  3. M

    HOW do I insert a baseline covariate in repeated GLM?

    Am I doing something wrong? Using repeated GLM. Two groups, experiment and control. Dependent is a score on a scale. Data (the same score on the scale) are collected pre intervention and two post-tests. I am going to use the pre-test scores as a covariate to correct for possible...