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Only the good die young ... perhaps? Sorry, but being one of several lefties
on the list, I couldn't resist. :)
Not the most reassuring thing I've read recently though, especially since
I'm just getting over the worst cold I think I have ever had...and it's like
a double whammy, because the PD meds don't seem to work very well when my
system is waging war with something else...

Tuesday January 27
Few Elderly Left-handed -- But Why?

NEW YORK (Reuters) -- There are fewer left-handers among older people than
among younger, although not primarily because of the forced change in
handedness commonly practiced in the past, according to a new study.

UK researchers call for more research to determine if left-handed people are
more likely to die younger -- either due to disease or to accidents in a
predominantly right-handed world.

Neurologists at Keele University in the United Kingdom surveyed nearly 8,000
people between the ages of 15 and 70, all residents of a small Lancashire
town. The participants completed questionnaires asking which hand they most
often used
to perform tasks such as writing, drawing, cutting with scissors, teeth
brushing, and striking a match.

To measure the impact of possible forced change in handedness, the questions
on writing and drawing -- activities most closely associated with education
-- were omitted from a second set of questionnaires. A report on the survey
findings
appears in the current issue of the Journal of Epidemiology and Community
Health.

Results from responses to the initial questionnaire indicated a decline in
left-handedness from 11.2% at age 15 to 4.4% at age 70. "With writing and
drawing excluded," the researchers wrote, "the prevalence of left-handedness
fell from 10.5% at age 15 to 4.95% at age 70."

Comparing these two measures of decline in the left-handed ranks, the
researchers determined that "if forced dextrality in older generations is
restricted to writing and drawing, then less than 20% of the fall in the
prevalence of left-handedness is accounted for by this mechanism."

Other theories regarding the scarcity of lefties among the elderly suggest
that gradual pressure from a predominantly right-handed civilization may
eventually induce a change in handedness, or that lefties are somehow more
likely to die
prematurely. However, "(e)xplanations... that rely on... liberalising
attitudes to sinistrals are not supported by this study," the researchers
concluded. "Only careful prospective... studies can satisfactorily answer
the important question of whether left-handers suffer from premature
mortality."

According to the journal, the prevalence of left-handedness among elderly
people has been steadily declining in the UK since 1913. SOURCE: Journal of
Epidemiology and Community Health (1998;52:41-44)

Copyright © 1997 Reuters Limited.

Judith Richards
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