The impact of chronotype on melatonin levels among shift workers.

Publication Type:

Journal Article


Occupational and environmental medicine, Volume 71, Issue 3, p.195-200 (2014)


2014, January 2014, Public Health Sciences Division


The association between shift work and cancer, which is thought to be mediated by effects on circulating melatonin levels, may be modified by chronotype (ie, the inherent preference for activity in the morning or the evening); however, few studies have examined the potential impact of chronotype on the carcinogenic effects of shift work. The authors analysed the impact of chronotype on previously reported differences in melatonin levels among healthcare workers that exclusively worked night or day shifts.