title: Left handedness is uncommon in breast cancer patients.
abstract: Left handedness was found to be significantly less common among patients with breast cancer in southern Sweden (1.5%) than among a female referent population (5%) (P less than 0.0025). The findings lend support to theories suggesting that hormonal factors in early life are of importance both for handedness and for the risk of breast cancer.
authors.affiliation: Department of Oncology, University Hospital, Lund, Sweden.
authors.forename: H
authors.initials: H
authors.lastname: Olsson
authors.forename: C
authors.initials: C
authors.lastname: Ingvar
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001943:Breast Neoplasms / Q000503:physiopathology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008875:Middle Aged; D012307:Risk Factors