Just a thought: A lot of tools, like scissors for instance are awkward to use left handed, so that might be a contributing factor.
MODERATOR NOTE: ksweetman, is this the column you’re referring to: http://www.straightdope.com/columns/read/1099/do-left-handers-die-young
It’s helpful to other readers if you provide a link when you start a thread. Saves search time, cuts down on confusion, and helps keep us on the same page.
If that’s NOT the column you were thinking of, please email me and I’ll fix this note. Cheers – Dex