Searching stroke on the ieu open gwas project web page, I've found that the information entered for ebi-a-GCST005838 study is a duplication of a ebi-a-GCST006906 study (european). The ebi-a-GCST005838 gwas is a multiancestry gwas and so the sample size/ncase/ncontrol should be different from the european study.
Searching stroke on the ieu open gwas project web page, I've found that the information entered for ebi-a-GCST005838 study is a duplication of a ebi-a-GCST006906 study (european). The ebi-a-GCST005838 gwas is a multiancestry gwas and so the sample size/ncase/ncontrol should be different from the european study.
https://gwas.mrcieu.ac.uk/datasets/?gwas_id__iexact=&year__iexact=&trait__icontains=Stroke&consortium__icontains=&page=1