74
Twenty-nine research teams analyzed the same data, and they all reached different results.
(fivethirtyeight.com)
https://fivethirtyeight.com/features/science-isnt-broken/
Another study with the same goal of comparing the results from different research teams found similar disparities, though the graphs aren't quite as pretty.
So ignore all non-significant results? What's to say those methods result in findings closer to the truth than the methods with no significant results.
The issue is that so many seemingly legitimate methods produce different findings with the same data.