Re: It can't happen here
- From: "Ken C. M." <kencmjr-nospam@xxxxxxxxxxx>
- Date: Fri, 28 Apr 2006 07:04:25 -0400
carlfogel@xxxxxxxxxxx wrote:
I was browsing here:
http://www.magma.ca/~ocbc/hfaq.html
When I clicked on this link:
http://www.magma.ca/~ocbc/jpeds.html
For convenience, I've copied the text below.
At first, I wondered if it was a hoax, but it seems to be
authentic--the spelling and language are not unusual for
such cross-cultural papers. Tatsuhiro Yamanaka does appear
to be a published Japanese pediatric researcher.
For those not familiar with statistics, the numbers do
support the conclusion of no significant difference for such
a study. (When an odds-ratio is 95% likely to fall on either
side of 1.00, it means that that the figures, no matter how
they may appear at first glance, suggest a 95% probability
that an effect was either positive, negative, or dead even.)
An alternative thread title was "Won't someone think of the
children?"
Cheers,
Carl Fogel
THE EFFECTIVENESS OF WEARING PEDESTRIAN HELMET WHILE WALKING
FROM HOME TO SCHOOL IN ELEMENTARY SCHOOL CHILDREN.
(from the Third International Conference on Injury Control
and Prevention, Melbourne, Australia, February 1996)
Presenter: Tatsuhiro Yamanaka, JAPAN
Author(s):
Yamanaka Tatsuhiro; Ogihara Arata
Department of Pediatrics, Yaizu Municipal Hospital, Yaizu
city, Shizuoka, Department of Public Health, School of
Medicine, Yokohama City University, Yokohama city, Kanagawa,
JAPAN.
PURPOSE: To evaluate the effectiveness of head injury
prevention among pedestrians wearing a helmet while walk.
METHOD: We performed a retrospective case control study of
head injury in elementary school children over a five-year
period in Shimizu city. Population is 240, 000 and there are
26 elementary schools in this city. The principle of the
school can decide whether helmet wearing should be a rule
for pupils, which means there are only two possible
situations, wearing or not wearing a helmet while walking.
Elementary school children are prohibited from bicycling to
school and there is no school bus system at all. The number
of head injuries and other injuries were collected from the
data sheet by the insurance system of the School Safety
Division of the National Stadium and School Health Center of
Japan.
RESULTS: There were 13 elementary schools which required
students to wear a helmet while walk. One school had changed
from wearing a helmet to not wearing a helmet during the
5-year period. The accumulated annual number of elementary
school children was 32,922 required to wear helmets, and
56,214 not required to wear helmets. The number of injuries
among children wearing helmets was 58 (0.18%), and 125
(0.22%) among children not wearing helmets during the 5-year
period. Head injuries were recorded in 4 children (0.012%)
wearing helmets and 10 (0.018%) who were not wearing
helmets.
CONCLUSION: There was no significant difference between
children wearing helmets and those not wearing helmets in
the incidence of all injuries and head injuries by Xy test.
The odds ratio for the no helmet system was 1.26 ( 0.92 to
1.71 for 95 % confidence) for all injuries and 1.46 ( 0.45
to 4.12 for 95 % confidence) for head injuries.
Silly study, silly idea.
The next idea that will come down the pipe is for EVERYONE to wear a helmet AT ALL TIMES.
Ken
--
New cycling jersey: $49
new cycling shorts: $39
Not being a slave to the petrol pump: priceless.
.
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