Meno,
That is the exact deception within this study.
We need to honest compare the risk ratio of MMR autism vs. risk of regular Autism.
In other words, how many doors does the Regular Autism need to knock on , before it gets allowed inside?
Now count all the doors that were knocked on by Regular Autism.
Regular Autism knocked on all the doors of the entire group, so that’s the risk ratio. You can’t exclude doors just because they got a vaccine.