Helmets cramp my style: Part 2
#1526
B) I do not wear a helmet while performing said activities.
Therefore, I chose not to wear a helmet while riding my bicycle.
#1528
Chasing the horizon.
Joined: Feb 2009
Posts: 500
Likes: 1
From: Michigan
Bikes: 2016 Felt F75, 2008 Mercier Corvus Steel, 2006 Trek 4300, 1985 Trek 620 (modernized)
A) Studies show that I'm at no greater risk of incurring head injuries while I am cycling than I do while walking, driving my car, showering, etc.
B) I do not wear a helmet while performing said activities.
Therefore, I chose not to wear a helmet while riding my bicycle.
B) I do not wear a helmet while performing said activities.
Therefore, I chose not to wear a helmet while riding my bicycle.
#1530
Senior Member
Joined: Dec 2009
Posts: 4,700
Likes: 5
Oh, look, some more "refutation" from that same Bicycle Helmet Research Foundation:
https://www.cyclehelmets.org/1034.html:
* The road users most at risk from head injury are pedestrians and young drivers. [1] [2]
So what? A cyclist is not a pedestrian nor a driver of any kind. Does not address the question of whether cycling helmets help prevent head injuries.
So what? A cyclist is not a pedestrian nor a motor vehicle occupant. Does not address the question of whether cycling helmets help prevent head injuries.
So what? A cyclist, even though he may very well be a child, is not a child engaged in jumping or falling. Does not address the question of whether cycling helmets help prevent head injuries.
So what? A road cyclist wasn't part of that "[m]ore than 99%". Does not address the question of whether cycling helmets help prevent head injuries.
So what? A cyclist is not a motorist, nor does he have the advantages of seat belts, interior padding, or air bags. Does not address the question of whether cycling helmets help prevent head injuries.
This entire page - which is linked to from the Wikipedia page on cycling helmet - tosses a bunch of utterly irrelevant stats in the air. It never once even tries to address the efficacy or lack thereof of bicycle helmets.
One would think the authors are deliberately trying to avoid a straight answer to the question as to whether or not bicycle helmets help to prevent head injuries.
And let's not forget official Wikipedia editor's opinions of the quality of the Wiki page on bike helmets:
Ouch.
Wow, looks like the "junk science" is coming from the "helmets aren't worth it" crowd.
Hmm, didn't closetbiker claim to have done "original research". Then he refers to the Wiki page in arguments to support his claims.
Circular argument at its best?
Look - "inappropriate citations" in the Wiki article on bike helmets.
https://www.cyclehelmets.org/1034.html:
Key facts about injury when cycling in perspective
* The road users most at risk from head injury are pedestrians and young drivers. [1] [2]
* In Great Britain, 6 times more pedestrians and 18 times more motor vehicle occupants suffer lethal head injuries than cyclists. Pedestrians and motor vehicle occupants also suffer more lethal injuries to the abdomen and thorax. [3] [4]
* Children are 2.6 times more likely to suffer head injury through jumping and falling than by cycling. [5]
* More than 99% of head injuries seen by UK hospitals do not involve road cyclists. [6]
* Helmets for motorists are much more effective than those for cyclists and more beneficial than seat belts, interior padding or air bags. Their potential for reducing injury is 17 times greater than that of cycle helmets. [7] [3]
This entire page - which is linked to from the Wikipedia page on cycling helmet - tosses a bunch of utterly irrelevant stats in the air. It never once even tries to address the efficacy or lack thereof of bicycle helmets.
One would think the authors are deliberately trying to avoid a straight answer to the question as to whether or not bicycle helmets help to prevent head injuries.
And let's not forget official Wikipedia editor's opinions of the quality of the Wiki page on bike helmets:
What this page has done to bicycle helmets is what creationists would like to do to the page on evolution.
The debate as presented is peppered with obscure rebuttals. For instance, consider the statement, "Hence, the evidence comes from two main types of observational study: time-trend analyses, rated as grade 2, and case-control studies with more potential ways of being wrong than either of the above, rated at grade 3 on a standard scale." Yes, it has a citation, but how is this scale "standard"? Yes, case-controlled studies are rated at grade 3, but that does not mean that case-controlled studies are therefore low-grade science, because the "Oxford Centre for Evidence-based Medicine Levels of Evidence" is a set of guidelines that should not be taken dogmatically. And no, time-trend analysis (which are the article's main evidence that bicycle helmets aren't worth it) are not "rated as grade 2" in the cited chart. Cohort studies are rated as level 2, but that's not the same as an epidemiological time-trend study. That sort of evidence is not rated on the chart at all, and it is generally grossly inconclusive even compared to case-control studies.
The central claim of the overgrown section on the helmet debate is that the evidence against helmets is better than the evidence in favor helmets. The article says that the evidence against is class 2, but the evidence in favor is class 3. This is both a misreading and a misuse of the standards of evidence-based medicine --- which first off should cite the much clearer Wikipedia page on evidence-based medicine rather than a cryptic PDF chart from a medical center. It's a misreading because a time trend is an uncontrolled national trial and not an ecological cohort study. It's a misuse because ultimately the grades of evidence-based medicine are guidelines of scientific common sense and not usually legalistic rules. A legalistic interpretation of such grades is only appropriate for evaluating potentially dangerous medical treatments. Bicycle helmets may be a bother, but they are not dangerous in the same sense that surgery is dangerous.
So yes, original research is the existing problem with this article.
So yes, original research is the existing problem with this article.
Circular argument at its best?
The fact remains that this article is tendentious and lop-sided against the use of bicycle helmets, when to the contrary the prevailing medical opinion is that bicycle helmets are important. You're clearly one of the skeptics and most of the article was clearly written by skeptics. Now, you guys may be right, but you're giving your dissent more space than the main recommendation of the medical community.
You deserve credit for paying some lip service to prevailing medical opinion. Just not as much as you devote to your own view. For instance, the section "position and arguments" devotes 150 words to the supporters --- like the American Medical Association and the American National Safety Countil --- but 400 words to opponents, which are described vaguely as "many notable academics" and so on.
You really haven't earned the right to the larger soapbox on this issue. The article smacks of original research even though you think that it doesn't. A paragraph that you just edited is still highly tendentious, for instance the quote "the evidence currently available is complex and full of contradictions, providing at least as much support for those who are sceptical as for those who swear by them". This is a fatuous description: research on bicycle helmets isn't any more complicated or contradictory than any other kind of scientific research. It is also an inappropriate citation, because it is a lay organization's assessment of scientific research. Given the length and structure of this article, it would be a Sisyphean effort to settle all of its bias on a point-by-point basis.
You deserve credit for paying some lip service to prevailing medical opinion. Just not as much as you devote to your own view. For instance, the section "position and arguments" devotes 150 words to the supporters --- like the American Medical Association and the American National Safety Countil --- but 400 words to opponents, which are described vaguely as "many notable academics" and so on.
You really haven't earned the right to the larger soapbox on this issue. The article smacks of original research even though you think that it doesn't. A paragraph that you just edited is still highly tendentious, for instance the quote "the evidence currently available is complex and full of contradictions, providing at least as much support for those who are sceptical as for those who swear by them". This is a fatuous description: research on bicycle helmets isn't any more complicated or contradictory than any other kind of scientific research. It is also an inappropriate citation, because it is a lay organization's assessment of scientific research. Given the length and structure of this article, it would be a Sisyphean effort to settle all of its bias on a point-by-point basis.
#1531
Chasing the horizon.
Joined: Feb 2009
Posts: 500
Likes: 1
From: Michigan
Bikes: 2016 Felt F75, 2008 Mercier Corvus Steel, 2006 Trek 4300, 1985 Trek 620 (modernized)
Go talk to ten neurologists or neurosurgeons at a few local hospitals. Get their opinion. Then let them yell at you for not wearing a helmet.
#1532
Senior Member
Joined: Dec 2009
Posts: 4,700
Likes: 5
A) Studies show that I'm at no greater risk of incurring head injuries while I am cycling than I do while walking, driving my car, showering, etc.
B) I do not wear a helmet while performing said activities.
Therefore, I chose not to wear a helmet while riding my bicycle.
B) I do not wear a helmet while performing said activities.
Therefore, I chose not to wear a helmet while riding my bicycle.
Where do they get accurate numbers for rates of injury, especially for a person who bikes a lot? Such a person is going to be a lot more physically fit than the average population, less susceptible to injury, and hopefully more coordinated.
Do you REALLY think biking in traffic is every bit as safe as walking from your living room to the toilet?
#1533
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Joined: Dec 2009
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A) Studies show that I'm at no greater risk of incurring head injuries while I am cycling than I do while walking, driving my car, showering, etc.
B) I do not wear a helmet while performing said activities.
Therefore, I chose not to wear a helmet while riding my bicycle.
B) I do not wear a helmet while performing said activities.
Therefore, I chose not to wear a helmet while riding my bicycle.
Your risk of head injury from walking to your john may very well be higher than when you bike in traffic, and therefore you may decide that the risk is already low enough while cycling that you decide that reducing the risk further by wearing a helmet isn't worth the effort.
But that doesn't remove that reduction in risk.
Your argument is subtly different from the argument that helmets do not help reduce injury risk. THAT argument is risible.
#1534
Senior Member

Joined: May 2002
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From: Beaverton, Oregon
Bikes: Rans Stratus, Trek 1420, Rivendell Rambouillet
over your head or
off your rocker?
Falls are a concern in the elderly.
https://www.phac-aspc.gc.ca/publicat/...25-1/e-eng.php
Head injury hospitalizations
Considering the rate of head injury to your age group, perhaps wearing a helmet 24/7 would help, or would you just prefer to continue being hypocritical and continue to take it off when you get off your bike?
off your rocker?
Falls are a concern in the elderly.
https://www.phac-aspc.gc.ca/publicat/...25-1/e-eng.php
Head injury hospitalizations
Considering the rate of head injury to your age group, perhaps wearing a helmet 24/7 would help, or would you just prefer to continue being hypocritical and continue to take it off when you get off your bike?
Apparently you cannot read charts either. If you'll look at my age group (60-69), you'll see that I have about the same risk as those in the 20-29 age group, or perhaps just slightly less risk according to that chart.
John
#1535
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Joined: Dec 2009
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Likes: 5
It's also interesting to note that the bulk of the edits to the cycling helmet Wiki page are from one Richard Keatinge, who appears to be from England and claimed to be a member of UK "CTC" cycling club.
Many of the articles referenced from the Wikipedia page on cycling helmets - especially those that attempt to (lamely) call into question the efficacy of bike helmet are from the UK's CTC.
Imagine that.
Read the Wikipedia comments page and see how this "controversy" has been created. Yes - created. There is no dispute in the scientific literature as to whether or not cycling helmets are effective in preventing head injures. Stick to reading scientific, published, peer-reviewed papers, not any "research" from any advocacy groups and you'll find UNANIMOUS conclusions that helmets do help prevent head injury.
One wonders if there might be an opinion writer somewhere who makes a living off stirring up such a "controversy"....
Now, that does NOT mean mandatory helmet laws are acceptable infringement on personal freedom.
Many of the articles referenced from the Wikipedia page on cycling helmets - especially those that attempt to (lamely) call into question the efficacy of bike helmet are from the UK's CTC.
Imagine that.
Read the Wikipedia comments page and see how this "controversy" has been created. Yes - created. There is no dispute in the scientific literature as to whether or not cycling helmets are effective in preventing head injures. Stick to reading scientific, published, peer-reviewed papers, not any "research" from any advocacy groups and you'll find UNANIMOUS conclusions that helmets do help prevent head injury.
One wonders if there might be an opinion writer somewhere who makes a living off stirring up such a "controversy"....
Now, that does NOT mean mandatory helmet laws are acceptable infringement on personal freedom.
#1536
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Joined: Dec 2009
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Likes: 5
It's just obfuscating noise.
The question is: why the seemingly deliberate obfuscation?
#1537
Senior Member

Joined: May 2004
Posts: 12,103
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From: Wilmington, DE
Bikes: 2016 Hong Fu FM-079-F, 1984 Trek 660, 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1, 2016 Islabikes Beinn 20 (son's)
If you can't be bothered to consider the point of the above statement, please save us all from your worthless rambling about what others do based on how you ride your bike.
#1538
Senior Member

Joined: May 2004
Posts: 12,103
Likes: 96
From: Wilmington, DE
Bikes: 2016 Hong Fu FM-079-F, 1984 Trek 660, 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1, 2016 Islabikes Beinn 20 (son's)
If you feel like you are at such a high risk for injury, then wear your helmet and be happy. Not all of us feel that we are at such a high risk for injury as you seem to. For most of us, the risks that we are exposed to (small as they might be) are not even alleviated by a bicycle helmet anyway. An inch of styrofoam will do very little to slow down a motor vehicle.
Last edited by joejack951; 01-30-10 at 08:04 AM. Reason: misspelling
#1539
Senior Member
Joined: Apr 2009
Posts: 922
Likes: 0
#1540
Senior Member
Joined: Apr 2009
Posts: 922
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Oh. OK. Debate over then. If your wife says that helmets prevent serious head injuries then that's all we need to know. Don't know why this has been going on so long.
Well, why bother? I mean we can just make **** up that suits our pre-conceived notions, such as:
Brilliant. Not just your wife, but also your brother. Case closed.
Arrogant turkey, idiot .. projection about people trying to get attention, class prejudice about Camaro drivers ... total ignorance of the Australian, NZ data. You're proof that some of the people riding bicycles are not very smart and not very nice.
I also notice that the guys that seem determined not to wear a helmet for no practical reason are also the ones that worry most about how they look on a bike. Well, fellas, you look like idiots, or at the very least, people that look like their trying to get attention by not wearing a helmet. I get the same sense of annoyance in my gut when I see a cyclist speeding down the road without a helmet as I do when some redneck lays rubber with his 1992 Camaro. It reminds me idiots and arrogant turkeys are everywhere.
Last edited by RazrSkutr; 01-30-10 at 08:17 AM. Reason: substitute "are" with "our"
#1541
All you can do to refute that study is argue about it's accuracy. How about these:
https://www.bmj.com/cgi/content/abstract/308/6922/173:
https://jama.ama-assn.org/cgi/content.../276/24/1968?:
https://www.bmj.com/cgi/content/abstract/308/6922/173:
https://jama.ama-assn.org/cgi/content...t/276/24/1974:
https://injuryprevention.bmj.com/cont.../122.abstract:
https://tra.sagepub.com/cgi/content/abstract/8/2/77:
Yep, in 15 minutes I dig up 5 or 6 actual academic papers that supporting the proposition that helmets are effective at preventing head injuries..
https://www.bmj.com/cgi/content/abstract/308/6922/173:
https://jama.ama-assn.org/cgi/content.../276/24/1968?:
https://www.bmj.com/cgi/content/abstract/308/6922/173:
https://jama.ama-assn.org/cgi/content...t/276/24/1974:
https://injuryprevention.bmj.com/cont.../122.abstract:
https://tra.sagepub.com/cgi/content/abstract/8/2/77:
Yep, in 15 minutes I dig up 5 or 6 actual academic papers that supporting the proposition that helmets are effective at preventing head injuries..
2. We've been through these studies before. They're based on two or three "root" studies which are then re-cycle through "meta-analysis". None of them have to stood up to examination by professional statisticians. In one especially bad case the study authors had assumed that the difference in injury rate between two cherry picked groups of children could be ENTIRELY explained by helmets - ie they credited them with preventing torso injuries! In fact, one group was riding on inner city roads without supervision, and another in parks, with adults present to herd them. For another discussion of the errors in some of this work take a look at https://www.cyclehelmets.org/1131.html
3. It is literally the case that NONE of the papers you quoted (so far as your bad links allow me to say this) have survived scrutiny by a professional statistician. They are the work of unscientifically qualified activist doctors who go out to prove what they want to believe and distort data through incompetence and enthusiasm. Again, take a look at that link- which is commentary by a professional statistician.
4. One of the 85% benefit studies was based on a factor of 10 error in arithmetic - it is still quoted, however!
Conclusion: you're either lazy or deliberately selecting papers that only prove what you want to believe - which on a safety issue is very stupid.
#1542
As achoo probably didn't think to check this:
This team's results have been found to be riddled with errors and "bodging" to get the numbers they want. No one else has found a benefit to wearing a helmet in collisions with cars. Which is where virtually all cyclist deaths occur.
So, once again, a helmet may be useful in reducing minor injury - but as a tool for reducing the possibility of death it is ineffective. Which is the point that you have failed to grasp. In fact, your stupidity is putting lives at risk - because if people believe that a helmet largely precludes the possibility of death then they will fail to take other safety measures and engage in riskier behaviour.
https://www.cyclehelmets.org/1052.html#A
Significantly, only studies by one team of researchers have concluded that all types of cycle helmet offer protection to all cyclists under virtually all circumstances, with and without motor vehicle involvement [9] [10]. It is this research that is most frequently cited in favour of cycle helmet effectiveness and helmet laws.
Significantly, only studies by one team of researchers have concluded that all types of cycle helmet offer protection to all cyclists under virtually all circumstances, with and without motor vehicle involvement [9] [10]. It is this research that is most frequently cited in favour of cycle helmet effectiveness and helmet laws.
So, once again, a helmet may be useful in reducing minor injury - but as a tool for reducing the possibility of death it is ineffective. Which is the point that you have failed to grasp. In fact, your stupidity is putting lives at risk - because if people believe that a helmet largely precludes the possibility of death then they will fail to take other safety measures and engage in riskier behaviour.
Last edited by meanwhile; 01-30-10 at 08:54 AM.
#1544
My wife is a nurse in a neurological unit. They see the minority of head injuries that require additional care beyond an emergency room visit. My wife says that about once a month, they get someone that slipped off a skateboard or fell off a bicycle, usually while doing something like going over a curb at low speed. It takes amazingly little inertia to hurt your head badly. A bike helmet will completely prevent those types of injuries.
#1546
Senior Member
Joined: Dec 2009
Posts: 4,700
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Cut-and-pasted from the thread in Commuting.
Note the number of independent studies here - it's NOT just "one small group".
Here is a link to a bunch of other published, scientific, peer-reviewed studies on bicycle helmets and their ability to prevent head and/or facial injuries, especially to the upper face.
https://depts.washington.edu/hiprc/pr...meteffect.html
Note the number of independent studies here - it's NOT just "one small group".
Here is a link to a bunch of other published, scientific, peer-reviewed studies on bicycle helmets and their ability to prevent head and/or facial injuries, especially to the upper face.
https://depts.washington.edu/hiprc/pr...meteffect.html
Strong protective effect among helmet users versus non-users for head, brain, facial, and fatal injuries. Head injury, OR=0.40 (0.29, 0.55), Brain injury, 0.42 (0.26, 0.67), Facial injury, 0.53 (0.39, 0.73), Fatal injury, 0.27 (0.10, 0.71)
Results provide clear evidence of helmet benefits.
Helmets reduce risk of head, brain, facial injury, and death.
Helmet use should be encouraged for all riders.
Helmets reduce risk of head, brain, facial injury, and death.
Helmet use should be encouraged for all riders.
Bicycle helmets reduced the incidence and severity of head injuries.
Helmet use significantly reduced risk of serious head injury by 68% comapred to non-users (OR=0.32 95% CI .11-.89)
No significant difference in serious injuries of all types comparing helmeted and non-helmeted users. (OR=0.9 95% CI 0.6-1.4)
Indicates crash severity similar for both groups.
No significant difference in serious injuries of all types comparing helmeted and non-helmeted users. (OR=0.9 95% CI 0.6-1.4)
Indicates crash severity similar for both groups.
Strong prospective effect of helmets for serious head injuries.
Protective effect of helmet underestimated due to exclusion of ICU cases. None of the ICU cases wore helmets.
Protective effect of helmet underestimated due to exclusion of ICU cases. None of the ICU cases wore helmets.
Current helmets offer no protection to face.
Did not divide face into regions. Upper and lower portions of face should have been analyzed separately.
Did not divide face into regions. Upper and lower portions of face should have been analyzed separately.
Protective effect among helmet users versus non-users for any head injury (OR=0.31, 0.26-0.37), brain injury (OR=0.35, 0.25-0.48), and severe brain injury (OR=0.26, 0.14-0.48). Odds ratios adjusted for age and motor vehicle involvement.
Equal effectiveness of helmet in crashes with motor vehicles (OR=0.31, 0.20-0.48) and without motor vehicles (OR=0.32, 0.20-0.39). Similar effectiveness for all age groups.
No differences seen in protective effect among helmet types.
Equal effectiveness of helmet in crashes with motor vehicles (OR=0.31, 0.20-0.48) and without motor vehicles (OR=0.32, 0.20-0.39). Similar effectiveness for all age groups.
No differences seen in protective effect among helmet types.
Bicycle helmets are effective for all bicyclists regardless of age and regardless of motor vehicle involvement in the crash.
Largest prospective case-control study of helmet effectiveness to date. 88% response rate.
Largest prospective case-control study of helmet effectiveness to date. 88% response rate.
Helmet use significantly reduced risk of injury to upper and middle face regions by approximately 65% compared to non-users (Upper face: OR=0.36, 0.26-0.49; Middle face: OR=0.35, 0.24-0.50).
Helmet use had no significant effect on reducing the risk of injury to the lower face compared to non-users (OR=0.88, 0.72-1.07).
Odds ratios adjusted for age, speed, and surface of crash site.
Helmet use had no significant effect on reducing the risk of injury to the lower face compared to non-users (OR=0.88, 0.72-1.07).
Odds ratios adjusted for age, speed, and surface of crash site.
Helmets protect against upper face and middle face injuries.
Use of two control groups thought to "bracket" the true effect of helmets on risk of facial injury.
General bicycle helmets with chin protection should be developed.
Use of two control groups thought to "bracket" the true effect of helmets on risk of facial injury.
General bicycle helmets with chin protection should be developed.
Significant protective effect among helmet users for head injury (OR=0.30, 0.11-0.85) compared to non-user
Helmet use significantly reduces the risk of sustaining a head injury, regardless of type of bicycle accident.
Some evidence refuting claims that helmet users are either more cautious or take more risks than non-users (8.1% head injury among non-helmeted bicyclists; 9.2% among non-owners; 3.5% among helmet users).
Some evidence refuting claims that helmet users are either more cautious or take more risks than non-users (8.1% head injury among non-helmeted bicyclists; 9.2% among non-owners; 3.5% among helmet users).
Children with head injury were more likely to have made contact with a moving vehicle than control children (19% v. 4%, p<0.001).
Helmet use significantly reduced the risk of head injury by 63% (OR=0.37, 0.20-0.66).
Helmet use signficantly reduced the loss of consciousness by 86% (OR=0.14, 0.05-0.38).
No significant reduction in crude risk of facial injuries between helmet users and non-users. (OR=1.15, 0.64-2.04).
Helmet use significantly reduced the risk of head injury by 63% (OR=0.37, 0.20-0.66).
Helmet use signficantly reduced the loss of consciousness by 86% (OR=0.14, 0.05-0.38).
No significant reduction in crude risk of facial injuries between helmet users and non-users. (OR=1.15, 0.64-2.04).
Helmet use significantly reduces the risk of upper head injury and loss of consciousness in a bicycle crash.
Helmet use does not signifiacntly reduce the crude risk of facial injury (no adjusted OR could be calculated from data given).
Helmet use does not signifiacntly reduce the crude risk of facial injury (no adjusted OR could be calculated from data given).
Helmet use significantly protects against head injury (crude OR=0.61, 0.47-0.80) and facial injury (crude OR=0.64, 0.49-0.84).
No significant differences in mortality rates between helmeted (approved or non-approved) and non-helmeted bicyclists.
No significant differences in mortality rates between helmeted (approved or non-approved) and non-helmeted bicyclists.
Helmeted riders over 33 times less likely to sustain a major head injury (OR=0.03, 0.01-0.19) and over 16 times less likely to have an ISS>15 than non-helmeted riders (OR=0.06, 0.02-0.15).
Significant protective effect among helmet users for serious upper facial injuries (OR=0.27, 0.10-0.80) compared to non-users
ER-based controls:
Protective effect against head injury (OR=0.26, 0.14-0.49) and brain injury (OR=0.19, 0.06-0.57).
Population-based controls:
Protective effect against head injury (OR=0.15, 0.07-0.29) and brain injury (OR=0.12, 0.04-0.40).
Protective effect against head injury (OR=0.26, 0.14-0.49) and brain injury (OR=0.19, 0.06-0.57).
Population-based controls:
Protective effect against head injury (OR=0.15, 0.07-0.29) and brain injury (OR=0.12, 0.04-0.40).
Helmet use protects against risk of head and brain injury by 85% and 88% respectively compared to those not wearing helmets.
Population-based control group provides the best estimate of helmet effect.
Population-based control group provides the best estimate of helmet effect.
Last edited by achoo; 01-30-10 at 10:00 AM. Reason: removed extraneous text not relevant to this thread
#1547
Senior Member
Joined: Dec 2009
Posts: 4,700
Likes: 5
And cyclehelmets.org as an organization? At BEST they incompetently cook their numbers:
WRONG.
That study is NOT faulty.
The pathetic attempt from our friends at the "Bicycle Helmet Research Foundation"? I already gutted that like the dead fish it is here. I'll repeat the gutting for your perusal:
And now to deconstruct the "refutations" of the studies that concluded bike helmets conclusively help prevent head injuries. First, this one, from the Bicycle Helmet Research Foundation (whoever they are...)
https://www.cyclehelmets.org/1068.html:
Well, let's see. Will the conclusions change radically?
FAIL, right there.
Book cooking in progress.
The "28.6% of cyclists who wore helmets" but "still had head injuries" are from the SUBSET of cyclists who were admitted to the hospital. In other words, the criteria for hospital admission is independent of whether or not the cyclist was wearing a helmet.
The "refutation" of the study I linked is FATALLY flawed. One wonders if it's deliberately misleading. There's no real need to continue, now is there?
But let's continue anyway...
Woo, that's a strong statement. Not.
Some more hemming and hawing...
Well, duh.
That's the entire point of the study.
Wow.
When we get to the conclusion, we find we waded through lots of noise and fury and got NOTHING. "may have influenced the results"?!!? Where's the "radical change" to the conclusions we were promised?
Did those "conclusions change radically", as promised above?
No. Not at all.
The "refutation" goes from that promise to "may have influenced the results".
Good God, that's lame.
This is about as faulty a study as any that has ever been published anywhere. Interestingly, the helmet advocates always pick this study - just about the shoddiest helmet study around - to support their view point. Mainly because they like the look of the stats - they align nicely with their prejudices.
That study is NOT faulty.
The pathetic attempt from our friends at the "Bicycle Helmet Research Foundation"? I already gutted that like the dead fish it is here. I'll repeat the gutting for your perusal:
And now to deconstruct the "refutations" of the studies that concluded bike helmets conclusively help prevent head injuries. First, this one, from the Bicycle Helmet Research Foundation (whoever they are...)
https://www.cyclehelmets.org/1068.html:
This paper (TRT89) is by far the most frequently cited research paper in support of the promotion of cycle helmets. It is referred to by most other papers on helmets. In fact, many other papers, and nearly all helmet promotion policies, rely fundamentally upon the validity of its conclusions.
The claims that helmets reduce head injuries by 85% and brain injuries by 88% come only from this source, yet are quoted widely as fact. For example, a policy statement on bicycle helmets by the American Academy of Pediatrics in 2001 states: “The bicycle helmet is a very effective device that can prevent the occurrence of up to 88% of serious brain injuries.” [1]
The prospect of achieving such massive reductions in injuries to cyclists lies at the root of helmet promotion and helmet laws around the world. Those who have taken the trouble to analyse the paper in detail, however, have found it to be seriously flawed and its conclusions untenable. Moreover, by making different - but no less valid - assumptions, the conclusions change radically.
The claims that helmets reduce head injuries by 85% and brain injuries by 88% come only from this source, yet are quoted widely as fact. For example, a policy statement on bicycle helmets by the American Academy of Pediatrics in 2001 states: “The bicycle helmet is a very effective device that can prevent the occurrence of up to 88% of serious brain injuries.” [1]
The prospect of achieving such massive reductions in injuries to cyclists lies at the root of helmet promotion and helmet laws around the world. Those who have taken the trouble to analyse the paper in detail, however, have found it to be seriously flawed and its conclusions untenable. Moreover, by making different - but no less valid - assumptions, the conclusions change radically.
Although the authors call odds ratios “percentage reductions in risk”, it is more informative to use risk ratios (RR) = %HIH / %HIN where %HIH and %HIN are the percentages of helmeted and non-helmeted cyclists with head injuries. TRT89 reported data for cyclists attending the emergency department for non-head injuries. For this group, which can be considered as an alternative control, the risk ratio was 0.36, suggesting that helmets prevented 64% of head injuries.
McDermott et al.[3] obtained more information and reported numbers of head injuries excluding forehead lacerations in the TRT89 study. The risk ratio excluding forehead lacerations was 0.39, a small reduction in the estimated benefit of helmets.
McDermott’s data on hospital admissions also illustrates the folly of labelling odds ratios as risk ratios. 28.6% of adult cyclists who wore helmets still had head injuries. If helmets prevented 85% of head injuries, an impossible 191% of non-helmeted cyclists would have head injuries. The actual figure (38%) was higher than for helmet wearers, but the difference due to helmet wearing was not statistically significant. [3]
McDermott et al.[3] obtained more information and reported numbers of head injuries excluding forehead lacerations in the TRT89 study. The risk ratio excluding forehead lacerations was 0.39, a small reduction in the estimated benefit of helmets.
McDermott’s data on hospital admissions also illustrates the folly of labelling odds ratios as risk ratios. 28.6% of adult cyclists who wore helmets still had head injuries. If helmets prevented 85% of head injuries, an impossible 191% of non-helmeted cyclists would have head injuries. The actual figure (38%) was higher than for helmet wearers, but the difference due to helmet wearing was not statistically significant. [3]
Book cooking in progress.
The "28.6% of cyclists who wore helmets" but "still had head injuries" are from the SUBSET of cyclists who were admitted to the hospital. In other words, the criteria for hospital admission is independent of whether or not the cyclist was wearing a helmet.
The "refutation" of the study I linked is FATALLY flawed. One wonders if it's deliberately misleading. There's no real need to continue, now is there?
But let's continue anyway...
A study in Tucson, Arizona, of bike/motor vehicle collisions found that helmet wearers had less severe non-head injuries. The authors concluded: "This implies that nonusers of helmets tend to be in higher impact crashes than helmet users. It is possible that at least some of the 'protection' afforded helmet wearers in previous studies may be explained by safer riding habits rather than solely a direct effect of the helmets themselves" [5].
The authors reported only 3 age categories: <15, 15-24 and 25+. However, a subsequent analysis of a subset of the same data [6] showed that 83% of children aged 0-4 suffered head injury, compared to 42% of 5-9 year olds and 23% of 10-14 year olds. Such large differences suggest that age adjustment in the original study may have been inadequate and hence the conclusions invalid.
Conclusion
The study compares groups of cyclists who chose to wear helmets with those who did not.
The study compares groups of cyclists who chose to wear helmets with those who did not.
That's the entire point of the study.
Many variables, such as the reasons for wearing a helmet and attitudes to risk, were not controlled for by the researchers and may have influenced the results.
When we get to the conclusion, we find we waded through lots of noise and fury and got NOTHING. "may have influenced the results"?!!? Where's the "radical change" to the conclusions we were promised?
Did those "conclusions change radically", as promised above?
No. Not at all.
The "refutation" goes from that promise to "may have influenced the results".
Good God, that's lame.
#1548
Senior Member
Joined: Dec 2009
Posts: 4,700
Likes: 5
I did check it. They're an unreliable advocacy group that I've already shown how they cook the numbers.
WRONG.
How many DIFFERENT studies did I refer to where ALL showed some benefit to wearing a helmet? Twenty? Twenty-five?
WRONG again.
Also, nothing more than an ad hominem attack disguised as a straw-man argument with no evidence to back it up.
This team's results have been found to be riddled with errors and "bodging" to get the numbers they want. No one else has found a benefit to wearing a helmet in collisions with cars. Which is where virtually all cyclist deaths occur.
How many DIFFERENT studies did I refer to where ALL showed some benefit to wearing a helmet? Twenty? Twenty-five?
So, once again, a helmet may be useful in reducing minor injury - but as a tool for reducing the possibility of death it is ineffective. Which is the point that you have failed to grasp. In fact, your stupidity is putting lives at risk - because if people believe that a helmet largely precludes the possibility of death then they will fail to take other safety measures and engage in riskier behaviour.
Also, nothing more than an ad hominem attack disguised as a straw-man argument with no evidence to back it up.
Last edited by achoo; 01-30-10 at 10:01 AM.
#1549
Senior Member
Joined: Dec 2009
Posts: 4,700
Likes: 5
Pictures that graphically demonstrate helmet effectiveness for six or seven independent studies, once again cut-and-pasted from the thread in Commuting:
Piling on:

More piling on:

How many DIFFERENT studies using DIFFERENT methodologies do you have to be shown?
I really want to know how you can come to any conclusion that helmets can't help prevent injuries while biking.
Helmets are used in (American) football. Get on a bike, and suddenly they're useless.
Helmets are used in hockey. Get on a bike, and suddenly they're useless.
Helmets are used in automobile racing. Get on a bike, and suddenly they're worthless.
Helmets are used in horse racing. Get on a bike, and suddenly they're worthless.
Helmets are used in construction. Get on a bike, and suddenly they're worthless.
Helmets are used in lacrosse. Get on a bike, and suddenly they're worthless.
That's risible.
Piling on:

More piling on:

How many DIFFERENT studies using DIFFERENT methodologies do you have to be shown?
I really want to know how you can come to any conclusion that helmets can't help prevent injuries while biking.
Helmets are used in (American) football. Get on a bike, and suddenly they're useless.
Helmets are used in hockey. Get on a bike, and suddenly they're useless.
Helmets are used in automobile racing. Get on a bike, and suddenly they're worthless.
Helmets are used in horse racing. Get on a bike, and suddenly they're worthless.
Helmets are used in construction. Get on a bike, and suddenly they're worthless.
Helmets are used in lacrosse. Get on a bike, and suddenly they're worthless.
That's risible.
#1550
Senior Member
Joined: Dec 2009
Posts: 4,700
Likes: 5
If you don't want to wear a helmet, fine. Don't wear one.
But don't go all ballistic and try to deny they help prevent head injuries. That's like arguing the earth is flat.
It's funny how all the arguments against helmets have to rely on small subsets of populations from certain research papers: THIS study showed that helmets didn't help prevent death when cyclists are involved in crashes with cars.
WHY do you have to add all that qualifications to helmet efficacy? Hmm?
But don't go all ballistic and try to deny they help prevent head injuries. That's like arguing the earth is flat.
It's funny how all the arguments against helmets have to rely on small subsets of populations from certain research papers: THIS study showed that helmets didn't help prevent death when cyclists are involved in crashes with cars.
WHY do you have to add all that qualifications to helmet efficacy? Hmm?




