Abstract
In a very large study (N = 1,247,344), left‐handedness showed no association with allergies overall (and an inconsistent association with individual allergies), but there was strong evidence that left‐handers had lower rates of arthritis and ulcer—Arthritis: Odds‐ratio (OR) = 0.942, 95% CI 0.922–0.962; Ulcer: OR = 0.920, 95% CI 0.896–0.944.
Notes
Address correspondence to I. C. McManus, Department of Psychology, University College London, Gower Street, London WC1E 6BT, UK. Email: [email protected]
We are grateful to Dr Avery Gilbert for his helpful comments on a draft manuscript, and for his contribution to the original study.