(Parts taken directly from "The Left-Handed Advantage" as printed on ABCNews.com)
I was driving in my car a few months ago, pondering my poor health and what I could do about it, when a very interesting segment of NPR's The Infinite Mind came on the radio. It's subject was left-handedness. Given the fact I'm a leftie, my interest was immediately piqued. I became even more intrigued when the announcer stated that left-handed people are more prone to having health problems than right-handed people. Having been plagued with poor health over the last few years (and some might say over my whole life) I decided to listen to the entire program.
According to the announcer, statistics show left-handed people are more likely to be schizophrenic, alcoholic, delinquent, dyslexic, and have Crohn's disease and ulcerative colitis, as well as mental disabilities. They're also more likely to die young and get into accidents.
Supposedly, evidence has shown a link between trauma during gestation or during birth, as well as in the age of the mother and so-called pathological left-handedness. Evidence shows that 50% of left-handedness is caused by gestational trauma and that mothers who are over 40 at the time of their child's birth are 128 percent more likely to have a left-handed baby than a woman in her 20s.
It could be that this early trauma is also the trigger behind health problems linked to left-handedness. Presidents Bill Clinton and George H.W. Bush may be seen as evidence. Both had histories of birth stress and have health issues from Clinton's severe allergies to Bush's Graves' disease.
On the other hand, being left-handed can also offer intellectual prowess. Tests conducted by Alan Searleman from St Lawrence University in New York found there were more left-handed people with IQs over 140 than right-handed people. Famous left-handed thinkers in history from Albert Einstein to Isaac Newton to Benjamin Franklin seem to underline the point.
If the information on The Infinite Mind is correct, it may be that left-handed people occupy the extremes when it comes to health and ability. Having dealt with painful shoulder and reproductive problems for the last five years, if I had the opportunity to choose between being extremely smart and sick or being of average intelligence and healthy, I think I would choose good health.