There’s no evidence parachutes work.
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Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]
101–110 of 169 posts
Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]
#102Earlier quoted context omitted.
> What point is this article trying to make? There is no evidence from RCT studies, that parachutes work (this post). There is no (or only very weak) evidence from RCT studies, that condoms work: https://jech.bmj.com/content/65/2/100 According to the Cochrane Database of Systematic Reviews, there is no evidence from RCT studies, that face masks would protect against respiratory infections: https://www.cochranelibrary…
This article predates the Cochrane review and pandemic so I doubt that was their goal.
That is a good point, but I think their point was to bring attention to the flawed philosophy, so that mistakes could be avoided. And surprisingly soon after their 2018 paper, the flawed philosophy lead to such mistakes in a surprisingly relevant, important and timely matter.
Linking their general points from 2018 to specific examples from the recent pandemic, is of course post hoc. But it demonstrates that their notion was not merely theoretical, but important in practice.
Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]
#103Unclear why this is in the bmj. Might be of use to students learning how to structure a paper?
Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]
#104Earlier quoted context omitted.
That's why I'm working on an invisible parachute. So that flak gunners can't see the paratroopers.
Maybe I am missing something but an invisible parachute would reveal more of a paratrooper than a visible one. Want to hide the paratrooper completely - use large, spherical parachutes. Elementary.
Aim for the center.
Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]
#105Earlier quoted context omitted.
>The fact that mice don't appear to deliberately jump off high things as a way to get down tells me that they probably do get hurt... Isn't this how bats have evolved though?
Not directly. There was one or more intermediary stage, probably jumping between trees. Outside my window, the squirrels are busy doing just that. I have a vague recollection of reading that most squirrels have evidence of trauma from falling, such as healed bone fractures.
Flying squirrels show an intermediate stage of such an evolution process. Evolution always involves intermediate stages. Even if a large discrete change could occur, fine tuning it is an extended incremental process.
If you go to the Cornell Ornithology Lab feeder cam and scan through the feed at night, you will find flying squirrels at the feeder. They show signs of nocturnal adaptation, another connection to bats.
Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]
#106Earlier quoted context omitted.
> The fact that mice don't appear to deliberately jump off high things as a way to get down tells me that they probably do get hurt... It's not how this works, cats are decent swimmers yet they generally refuse to get anywhere close to water…
Well me too but if i could just jump off of stuff if be skipping the stairs a lot more often. I agree with the other person, seems logical to me that for a prey animal they'd be careful about changing their threat landscape too fast. Once you let gravity take over there's no telling where you'll land. You could roll right into a ditch or a cats paws. And maybe they actually do jump sometimes, but only when there's ce…
I tend to wear jeans with skinny legs that don't seem conducive to taking across-the-stairs (I'm thinking 3 to 5 meters in the horizontal direction) jumps.
Why do I wear impractical clothing? I never even thought of it as impractical.
Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]
#107Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]
#108Unclear why this is in the bmj. Might be of use to students learning how to structure a paper?
Probably for readers to learn about critical thinking.
Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]
#109Finally someone is filling the knowledge gap identified by https://www.ncbi.nlm.nih.gov/pmc/articles/PMC300808/
> Advocates of evidence based medicine have criticised the adoption of interventions evaluated by using only observational data. We think that everyone might benefit if the most radical protagonists of evidence based medicine organised and participated in a double blind, randomised, placebo controlled, crossover trial of the parachute
“Oh yeah, tough guy? Jump out of this airplane.”
Re: Parachute use to prevent death, trauma when jumping from aircraft (2018) [pdf]
#110Unclear why this is in the bmj. Might be of use to students learning how to structure a paper?
I think the paper is a satire on "evidence-based medicine" - a framework which insists upon randomized controlled trials as the primary basis for medical decisions.
Notably this is exactly such a trial, while also absolutely irrelevant to the question of needing a parachute or not (the trial planes were all on the ground at the time of the jumps).