# meta-analysis

1. ### Calculate effect size from regression estimates for meta-analysis

Hi, I really hope someone can help me, I'm a bit stuck.. I'm running a meta-analysis looking at childhood predictors of personality disorders, so I'm pooling effect sizes of published longitudinal studies looking at this relationship. I need effect size data for all studies I want to...
2. ### Standard deviation of the mean difference out of Pre/Post Test Descriptive Statistics

I have several RCT pre/post intervention studies that I am calculating Hedge's g for. All of the studies report the difference of mean and difference of standard deviation between pre/post for each group except one. I know how to calculate the difference of mean [= Mean(post)-Mean(pre)], but...
3. ### How to use a meta-analysis to assess the equivalence of two different procedures?

I'm making a comparison of two surgical procedures, and I want to know how I can analyze the data I have for a meta-analysis. The overall surgical procedure is the same, but some authors choose to modify the procedure a bit. So basically I have a large number of studies with the standard...
4. ### Interpretation of correlation coefficient

Hello, I am working on a meta-analysis with the program R. Here I am investigating the relationship between the dependent variable "participation in Lobbying" (results = yes or no) and the independent variable "company size" (result = value of assets). The result I got is an Fisher's...
5. ### Convert odds ratios and beta coefficients to a comparable effect size

Dear all, First a short introduction to my study/review/meta-analysis. The purpose of my study is to systematically review longitudinal evidence on the association between psychosocial work characteristics (i.e. job demands, job control, social support) and sleep, since cross-sectional...
6. ### Meta-analysis : Bayesian credible intervals

Hi guys, thank you very much for responding to my request I have conducted a meta-analysis of a common medical treatment. There have been several difficulties along the way. There were six studies. One study had a shared comparison group. This necessitated doing a weighted least squares...
7. ### Meta-analysis - Obtaining r from t, F, or χ2

Help! It is common in meta-analyses to find the following statement, or something very like it: "The present meta-analysis includes studies that report a simple correlation between the constructs of interest (r—Pearson’s correlation coefficient) (or equivalent r—transformed from t, F, or χ2)...