According to this non-profit study on faith retention, Greek Orthodox Christians have the highest retention rates of any Christian group. It isn’t clear from this study if ‘Greek Orthodox’ includes all Orthodox jurisdictions or if this is specifically calling out the Greek Orthodox. “Retention” in the survey was posed as a question about whether one is still a member of the faith that they were raised in. For any religion, the percentage of adults who remain affiliated is called the “retention rate.”
Do Orthodox Christians Have Highest Faith Retention Rate?
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