Your point is valid, but it’s an interesting note that the document in the linked page reads like a summary, which it probably is. It’s probably the case here,

Your point is valid, but it’s an interesting note that the document in the linked page reads like a summary, which it probably is. It’s probably the case here, as with most summaries, that some detail has been omitted for brevity. I wonder if those statistics are covered in more detail in the actual studies being referenced.