It sounds like they had 401 cases where they had two scans with covid in between so in those cases at least you have a direct paired control. But yeah I'm also skeptical of how big of a practical effect this has on that many people. That being said we're fucking around and finding out about a virus we know little about getting all into our vital organs and causing our immune system to go wild.
That didn’t exactly clarify how they controlled for age factors
384 in the control group, maybe?
It sounds like they had 401 cases where they had two scans with covid in between so in those cases at least you have a direct paired control. But yeah I'm also skeptical of how big of a practical effect this has on that many people. That being said we're fucking around and finding out about a virus we know little about getting all into our vital organs and causing our immune system to go wild.