Steven Stellman - The epidemiology of left-handedness in a hospital population

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      Stellman, S. D., Wynder, E. L., DeRose, D. J., Muscat, J. E.   7 (3) 167-71-

      Abstract: PURPOSE: We evaluated the association   between left-handedness (LH) and age, education, cigarette   smoking, alcohol consumption, and disease status in a   case-control study of 8801 hospitalized patients with cancer and   those with other conditions. METHODS: Subjects were interviewed   in person using a structured questionnaire that contained   detailed sections of lifestyle behaviors. RESULTS: The overall   prevalences of LH were 7.6% among men and 6.5% among women. Among   both sexes LH declined with increasing age (P < 0.05). After   adjustment for age, the following associations were observed. Men   had a higher risk of LH than women. The prevalence of LH was   lower in ever-married subjects compared with never-married   subjects (odds ratio [OR] for men, 0.7; 95% confidence intervals   [CI], 0.5-0.9; for women, OR, 0.5; 95% CI, 0.3-0.9). Among men,   the prevalence of LH was not associated with race, years of   education, smoking status, or levels of alcohol consumption. The   risk of LH was elevated in men diagnosed with fractures as   compared with all other male patients (OR, 2.4; 95% CI, 1.3-6.7).   Among women, LH was not associated with race, smoking, or   hormonal and reproductive factors, but LH was more common among   female high-school and college graduates and among self-reported   alcoholics. The odds ratio of LH was significantly lower in women   with breast cancer (OR, 0.3; 95% CI, 0.1-0.7). CONCLUSIONS: The   increased risk of serious injuries in LH is not a result of   higher alcohol use. Handedness might be an important factor in   the safe use of industrial equipment.

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