Be careful interpreting this study summary.
The article's peer reviews (on PubPeer) list a few analytic issues that call the findings into question:
https://pubpeer.com/publications/59F515775D10D854ABB7F4B31D4...
The article's peer reviews (on PubPeer) list a few analytic issues that call the findings into question:
https://pubpeer.com/publications/59F515775D10D854ABB7F4B31D4...
But it could very well be that they're supposed to be the same? Authors may just need to better highlight why the same control is allowed to be use for comparing 2 different result sets.
[0] https://pubpeer.com/publications/59F515775D10D854ABB7F4B31D4...