I am conducting a meta-analysis and the effect sizes are mostly Cohen's d or log odds ratios. However, a few of the effect sizes are regression coefficients obtained from negative binomial regressions. I would like to convert these negative binomial regression coefficients to Cohen's d or log odds ratios.
I would very much appreciate some advice on how to do this. I came across this Shiny App: https://stefany.shinyapps.io/RcountD/ but it requires knowledge of the original regression intercept, standard error, and dispersion, which I don't have as I'm using summary statistics. The summary statistics I have are the negative binomial regression coefficients, their standard errors, and the sample size.
Thanks in advance for your help.