Yes, everything has been recorded. The interesting thing is how do the more healthy patients end up in the praying group consistently since each patient has been assigned randomly to each of the groups (intervention vs no intervention).

Remember that one group was prayed upon and the other one wasn’t. And the praying happened years after so there’s no interaction with the patients directly. Just retrospectively. The records never changed, but when you compare the groups you see significant differences, with the praying group having better health outcomes.