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From: Rolf Mantel <news@hartig-mantel.de>
Newsgroups: rec.bicycles.tech
Subject: Re: Helmet efficacy test
Date: Tue, 25 Mar 2025 17:35:30 +0100
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Am 25.03.2025 um 17:25 schrieb Catrike Ryder:
> On Tue, 25 Mar 2025 17:02:06 +0100, Rolf Mantel
> <news@hartig-mantel.de> wrote:
> 
>> Am 25.03.2025 um 16:53 schrieb Catrike Ryder:
>>> On Tue, 25 Mar 2025 11:11:14 -0400, Zen Cycle <funkmaster@hotmail.com>
>>> wrote:
>>>
>>>>
>>>>> On 3/25/2025 4:19 AM, floriduh dumbass wrote:
>>>>>> On Mon, 24 Mar 2025 21:20:38 -0400, Frank Krygowski
>>>>>> <frkrygow@sbcglobal.net> wrote:
>>>>>>
>>>>>>> Bicycling has never been a major source of serious traumatic brain
>>>>>>> injury (TBI). On a nationwide basis, bicycling's contribution to TBI
>>>>>>> counts is low enough to be off most "causes" charts. Bicycling causes
>>>>>>> fewer then 1% of U.S. TBI deaths, far fewer than pedestrian travel, and
>>>>>>> far fewer on a "per mile" basis. And historic data over the years shows
>>>>>>> quite clearly that bicycle helmets are not preventing either fatalities
>>>>>>> or concussions.
>>>>>>
>>>>>> Impossible to document that.
>>>>
>>>> Wrong, as usual.
>>>>
>>>> https://pmc.ncbi.nlm.nih.gov/articles/PMC7025438/
>>>>
>>>> https://www.nature.com/articles/s41598-023-35728-x
>>>>
>>>> https://www.cpsc.gov/Newsroom/News-Releases/2021/New-CDC-Report-Finds-More-Adults-Are-Dying-from-Bicycle-Related-Accidents-CPSC-Says-it-Highlights-the-Importance-of-Helmets
>>>>
>>>> https://www.nsc.org/safety-first/bicycle-safety-statistics-may-surprise-you?srsltid=AfmBOoq4LC_IGLItTnDBXBm4Yu6K20nqSHjsZbqpkk-jQ2y4Y1J7hfbf
>>>>
>>>> https://biausa.org/public-affairs/media/keep-your-brain-safe-while-biking
>>>>
>>>> https://publications.aap.org/pediatrics/article/150/3/e2022058878/188764/Helmet-Use-in-Preventing-Head-Injuries-in?autologincheck=redirected
>>>>
>>>> These all contradict Frank, but that isn't the point of this message.
>>>>
>>>> The point of this message is to point out, once again, your
>>>> unsubstantiated conclusions rooted in willful ignorance.
>>>
>>> How one would go about proving that bicycle helmets are not preventing
>>> either fatalities or concussions?
>>
>> Statistical accident analysis, just like it was possible to show the use
>> of seat belts.
> 
> You could prove that helmets don't always prevent head injuries, but
> not that they don't sometimes do it. Proving a negative is difficult
> task.

Correct.  At worst I can say "will not help on average" but I won't be 
able to say "will never help and never hurt" or "will sometimes help and 
sometimes hurt really bad".

But what should the consequences be for me: if it sometimes helps and 
sometimes hurts, how should I ensure it helps me instead of hurting me?