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November 08, 2005

Somewhat reassuring

The accident happened just minutes into a display which was being watched by some 15,000 people at Wicksteed Park near Kettering in Northamptonshire. A spokesman for Kettering General Hospital said two children and an adult remain in hospital. One child may be transferred to a specialist burns unit.

It may seem counter-intuitive, but, I find the appearance of stories like this about organised displays somewhat reassuring. The fact that a single stray firework injuring 11 people at a display is newsworthy means that, of the probably hundreds of thousands, maybe millions of people attending organised firework displays last weekend, really rather few were injured by stray fireworks. Of course, it's sad that 11 people have been hurt, and I wish the 3 who remain hospitalised a speedy recovery.

According to statistics published this May, last firework season over 50% of firework related injuries occurred at private firework parties, with only 8% of injuries occurring at large public displays. Of course, the nature of statistics says that these charts could be used to show that indoors is the safest place to use fireworks, with only 1% of injuries being sustained indoors, but this is actually because nobody is stupid enough to use fireworks indoors. With, apparently, about a dozen exceptions, in the 2004 firework season.

As it happens, this year I missed both the big organised local display, and the little display/party put on by a local pub, since I was at work every night of the bonfire weekend; but then, once you've "ooooh!"ed and "aaaah!"ed at one set of fireworks, they're all the same, right?

Anyway, remember kids, organised displays are safer, and way more spectacular than setting off a bunch of rockets in your back garden will ever be. Also, setting rockets off along the street outside the local bus station isn't big, hard or clever. Thanks.

Posted by James at 01:45
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You'd make a great politician, though you at least admit that use of statistics can be dodgy..

What proportions of people attended public displays? How does the risk of attending a private display not run by idiots compare to the risk of attending a public display? How does the risk of attending a firework display compare to the risk of crossing the road (etc)?

A very quick look suggests that about 1100 people were injured by fireworks, and about 250,000 people are injured on the roads every year. Let's say (conservatively) that 1/5 of the population went to some form of display, and average out over all kinds of displays. That makes the risk of doing so about the same as two week's worth of risk on the roads. Assuming the distribution of severity of injuries were similar, etc etc.
[http://www.thinkroadsafety.gov.uk/statistics.htm]

All very vague but I personally think that I have friends who aren't idiots and that I'm probably about as safe at a private display as I am driving to it, and I'll enjoy the social atmosphere more. Not that I actually went to anything this year.

Sorry about the lack of line breaks, the ones I wrote are being ignored and its stripping the HTML I tried to insert them with..

Posted by: Ganesh at November 8, 2005 11:05 AM

I think my main point was more "despite these injuries, big displays are pretty damn safe", rather than "these statistics show that everyone who has a private display dies a horrible death." But also, just because you think your friends are competent enough to set off fireworks safely, that doesn't mean most people are, necessarily.

And none of this changes the fact that an organised display has (generally) a way bigger firework budget, leading to a longer / more impressive display.

Posted by: James at November 8, 2005 11:37 AM

I agree that public displays are generally very safe. However, it's not fair to imply, as you do, that private displays are dangerous things; you don't even back up your assertion that public ones are "safer", let alone provide a reasonable argument that private ones are unacceptably dangerous.

And I still prefer private displays, for the social reasons I gave.

Posted by: Ganesh at November 8, 2005 11:49 AM

There's a key aspect of risk which I have to say I'm surprised hasn't been mentioned - whether the risk can be reduced.

If people are aware of the risk and it has been minimised then you can't ask for much more than that whatever the end-of-the-day figures for injuries and death turn out to be. If there's even one slight injury that could have been easily prevented then that's what needs chasing down.

Sure, only 11 people may have been injured in all and it's good that that figure is low, but is there something practical that could have been done to make that zero? That's the question that's going to be asked and it's going to be asked whether it's one person injured in the country or a hundred.

Posted by: Edd at November 8, 2005 01:06 PM

Hmmm. The pie chart Jimbo's talking about quite clearly shows that if you've been injured with a firework, you were probably at a private party.

At no point does jimbo say that private parties are "dangerous" or (as the hyperbole hits higher) "unacceptably dangerous."

There are no statistics regarding how many people attend each type of event, so we can't be specific about which type is actually safer.

But we can speculate. If we think about the vast number of fireworks launched at a public display compared to a private, it might suggest again that something going wrong in a public display is very unlikely.

Also the fact that public displays are often automated, whereas private ones involve someone lighting a fuse and running away, might suggest that at least the moment of ignition is far safer at public displays. Another factor is that people are usually kept far further back from the fireworks than at a private function.

There is also more likely to be medical assistance on-hand at a public event.

Additionally, were we to (say) assign a tiny probability to a firework malfunctioning and launching sideways (or whatever), then simple arithmetic might lead us to conclude that 15000 people watching 50 fireworks (at a public display) are far less likely to be hit than 15000 people watching 18750 fireworks (at private parties, assuming 25 fireworks and 20 people per party).

Lastly, accusing people of being like a politician is both unhelpful and politician-like (as is all rhetoric). I realise this sets up a feedback loop with me accusing myself, but hey.

Oh, and road safety? Isn't this a red herring, except to set up the phrase, "I'm probably about as safe at a private display as I am driving to it." Not sure what real value this has.

Posted by: Rob G at November 8, 2005 01:55 PM

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