change score

  1. K

    Creating Z-Scores for Meta-Analysis

    I will be conducting a meta-analysis that compares post-treatment changes in depression between the control and intervention groups. I have the Mean, SD, and N for depression at both time-points. Since different studies used measures to assess depression, I was planning to convert the change...
  2. S

    SPSS interpreting change scores, am I doing it right??

    I had to calculate some change scores for my dissertation. I didn't even know what they were until my prof told me to do that in addition to my other statistics. I tested 2 groups, 1 got supplements the others a placebo and tested them before and after taking them. They filled in mood and stress...
  3. S

    Change score in long format

    Hey guys. So I'm working on data and need to compute a change score. The data is panel data, where ID is country and I have 12 years. Here's my problem. I need to drop all years between 2000 and 2011 and compute a change score between 2000 and 2011. The drop part isn't the problem but the...
  4. O

    Change scores: t-test or mann-whitney U test ?

    Hi there Nice forum btw. Question: I have change-scores on pain in 37 patients pre/post intervention. which test do you use? t-test or mann-whitney U test? i was told that with change-scores they are always normally distributed and i can use a t-test... any reference for such a...
  5. U

    1 predictor, 2 different values for baseline statistic & change statistic?

    Hi, I am conducting a Cox Regression for my first time. I created a simple model with only 1 predictor (categorical), one dependent variable (continuous survival time), and 1 event that defines whether the hazard criterion was met (dichotomous). Since there is only one step in this model, I...
  6. R

    Confidence intervals for difference between change scores

    Hi All, I have two groups tested at four timepoints with a survey of ability. I have compared the groups for change from baseline at each timepoint and have confidence intervals for each change score. Now i want to compare the change scores between each group. Obviously subtracting change...