This popular myth has its roots in a series of flawed papers published in the late 1980s and early 1990s.
Left-handed people, on average, die younger than right-handed people.
Do Left-Handed People Die Younger Than Right-Handed People?
Do Left-handed People Really Die Young?
What's New, Page 699
What's New, Page 688
Do Left-handed People Really Die Young?
A follow-back study on a large sample of death certificates
What percentage of women are left-handed? Why are there fewer
Modeling to explore and challenge inherent assumptions when cultural norms have changed: a case study on left-handedness and life expectancy, Archives of Public Health
65 Left Handed Facts: Which Ones Are Right?
Archives, Page 203
Do Left-Handed People Actually Die Sooner? Here's What We Know
A large-scale population study of early life factors influencing left- handedness
Left handed drivers have more accidents and speeding fines