[tboughen]

“cyclists were given 8.5cm (3.3 inches) more clearance by cars if they were not wearing helmets.”

https://helmets.org/walkerstudy.htm

[threeseed]

You know that the article you posted was about refuting this claim:

"After re-analysis of Walker's data, helmet wearing is not associated with close motor vehicle passing"

[KennyBlanken]

As discussed above: the "re-analysis" took an analog measurement, filtered it into a binary "close" or "not close" at an arbitrary distance threshold, and then patted themselves on the back when the found there was no difference.

[i_am_jl]

Confirmation bias machine strikes again.