Chronotype and postmenopausal breast cancer risk among women in the California Teachers Study.

ABSTRACT: Chronotype is the behavioral manifestation of an individual's underlying circadian rhythm, generally characterized by one's propensity to sleep at a particular time during the 24 hour cycle. Evening chronotypes ("night owls") generally suffer from worse physical and mental health compared to morning chronotypes ("morning larks") - for reasons that have yet to be explained. One hypothesis is that evening chronotypes may be more susceptible to circadian disruption, a condition where the coordinated timing of biologic processes breaks down. The role of chronotype as an independent or modifying risk factor for cancer has not been widely explored. The objective of the current study was to evaluate the risk of breast cancer associated with chronotype in a case-control study nested within the Cal

SUBMITTER: Hurley S 

PROVIDER: S-EPMC6818501 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature