What is the best test of heterogeneity of meta- analysis data ?

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Jos Feys

Maybe tis can help:

https://www.statsdirect.com/help/meta_analysis/heterogeneity.htm

Lubna Jamal Abdulmalek

Thank you Jos Feys

Abbas Lafta Kneehr

The classical measure of heterogeneity is Cochran’s Q, which is calculated as the weighted sum of squared differences between individual study effects and the pooled effect across studies, with the weights being those used in the pooling method. Q is distributed as a chi-square statistic with k (numer of studies) minus 1 degrees of freedom, but it not sufficient when the number of Studies is so small.