title: Daylight saving time transitions and road traffic accidents.
abstract: Circadian rhythm disruptions may have harmful impacts on health. Circadian rhythm disruptions caused by jet lag compromise the quality and amount of sleep and may lead to a variety of symptoms such as fatigue, headache, and loss of attention and alertness. Even a minor change in time schedule may cause considerable stress for the body. Transitions into and out of daylight saving time alter the social and environmental timing twice a year. According to earlier studies, this change in time-schedule leads to sleep disruption and fragmentation of the circadian rhythm. Since sleep deprivation decreases motivation, attention, and alertness, transitions into and out of daylight saving time may increase the amount of accidents during the following days after the transition. We studied the amount of road traffic accidents one week before and one week after transitions into and out of daylight saving time during years from 1981 to 2006. Our results demonstrated that transitions into and out of daylight saving time did not increase the number of traffic road accidents.
authors.affiliation: Department of Mental Health and Substance Abuse Services, National Institute for Health and Welfare, 00271 Helsinki, Finland. tuuli.lahti@thl.fi
authors.forename: Tuuli
authors.initials: T
authors.lastname: Lahti
authors.forename: Esa
authors.initials: E
authors.lastname: Nysten
authors.forename: Jari
authors.initials: J
authors.lastname: Haukka
authors.forename: Pekka
authors.initials: P
authors.lastname: Sulander
authors.forename: Timo
authors.initials: T
authors.lastname: Partonen
mesh_terms: D000063:Accidents, Traffic / Q000706:statistics & numerical data*; D002940:Circadian Rhythm; D005387:Finland / Q000453:epidemiology; D006801:Humans; D016015:Logistic Models; D016012:Poisson Distribution; D012621:Seasons; D013995:Time; D014947:Wounds and Injuries / Q000453:epidemiology / Q000209:etiology