Small shifts in diurnal rhythms are associated with an increase in suicide: The effect of daylight saving

  title={Small shifts in diurnal rhythms are associated with an increase in suicide: The effect of daylight saving},
  author={Michael Berk and Seetal Dodd and Karen Tracey Hallam and Lesley Berk and John F. M. Gleeson and Margaret J. Henry},
  journal={Sleep and Biological Rhythms},
Large disruptions of chronobiological rhythms are documented as destabilizing individuals with bipolar disorder; however, the impact of small phase altering events is unclear. Australian suicide data from 1971 to 2001 were assessed to determine the impact on the number of suicides of a 1-h time shift due to daylight saving. The results confirm that male suicide rates rise in the weeks following the commencement of daylight saving, compared to the weeks following the return to eastern standard… Expand
Individual response to the end of Daylight Saving Time is largely dependent on habitual sleep duration
Adherence to the external clock by adjusting bed times and rise times was apparent on the first night, but difficulties in following this timing on subsequent nights point to a delay in full adjustment, particularly for those who habitually sleep for less than 7.5 h/night. Expand
The impact of daylight saving time on sleep and related behaviours.
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Indirect evidence of an increase in traffic accident rates, and change in health and regulatory behaviours which may be related to sleep disruption suggest that adjustment to daylight saving time is neither immediate nor without consequence. Expand
Analysis of circadian rhythms from online communities of individuals with affective disorders
The findings show that individuals with affective disorders show a significant distinction in their circadian rhythms across the online activity, shedding light on the potential of using social media for identifying diurnal individual variation in affective state, providing key indicators and risk factors for noninvasive wellbeing monitoring and prediction. Expand
Aggression and sleep: a daylight saving time natural experiment on the effect of mild sleep loss and gain on assaults
ObjectivesThe purpose of this study was to test the effect of a mild, short-term sleep loss/gain on assault rates.MethodsUsing National Incidence Based Reporting System data and city-reported dataExpand
Daylight saving time: an American Academy of Sleep Medicine position statement.
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Suicides Before, During, and After Daylight Savings Time in the United States
This study was designed to investigate differences in the number of suicides committed in the United States before, during, and after daylight savings time (DST). Conflicting results in theExpand
A chronobiological evaluation of the risks of canceling daylight saving time.
The long-term impact of seasonal regulation of clocks (Daylight Saving Time) is analyzed showing that it helped to mitigate the advance of the phase of human activity during the twentieth century andExpand
Saving Light, Losing Lives: How Daylight Saving Time Impacts Deaths of Despair
This paper estimates the impact of Daylight Saving Time (DST) on deaths of despair (DoD) in the United States. Using Multiple Cause-ofDeath Mortality Data from the National Vital Statistics System ofExpand
Using the Life Satisfaction Approach to Value Daylight Savings Time Transitions: Evidence from Britain and Germany
AbstractDaylight savings time represents a public good with costs and benefits. We provide the first comprehensive examination of the welfare effects of the spring and autumn transitions for the UKExpand
The long term impact of Daylight Saving Time regulations in daily life at several circles of latitude
We analyze large scale (N ~ 10000) time use surveys in United States, Spain, Italy, France and Great Britain to ascertain seasonal variations in the sleep/wake cycle and the labor cycle afterExpand


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The records of 377 bipolar disorder patients who were consecutively admitted to a general inpatient psychiatric unit in mid-Michigan over a 6-year period were examined and found a bimodal season distribution. Expand
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Investigation of the melatonin suppression by dim light in patients with bipolar affective disorder, seasonal affectsive disorder and major depressive disorder suggests a supersensitive melatonin response to light, whereas patients with major depressive Disorder display similar suppression to controls. Expand
Treatment of Seasonal Affective Disorder with Light: Preliminary Australian Experience
Six patients with a history of Seasonal Affective Disorder were treated with bright artificial light and the main improvements were a return to normal sleeping patterns, a reduction in eating habits, improved energy level, a desire to continue with interests and activities and an improvement in mood. Expand