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Does the transition into daylight saving time really cause partial sleep deprivation?
Ann Hum Biol. 2014 Nov-Dec; 41(6):554-60.AH

Abstract

AIM

To identify possible changes in the sleep patterns according to chronotype in undergraduate students during the daylight saving time (DST) transition.

METHODS

A total of 378 students answered the Morningness-Eveningness Questionnaire (MEQ) to determine their chronotype and kept a diary about sleep-wake schedules 1 week before and after the DST transition. Oral mucosal cell samples were collected for genetic analysis.

RESULTS

After the DST transition, intermediate types (I-types) delayed bedtime and increased their time in bed and all groups delayed their wake-up time. All groups presented a shorter phase angle between sunset and the bedtime after the DST transition. On the other hand, only E-types showed a tendency to reduce the phase angle between sunrise and wake-up time, while I-types and M-types kept the same phase angles between sunrise and wake-up time after the DST transition. The polymorphisms in the human genes CLOCK and PER3 were not associated with individual differences in sleep patterns, nor were they associated with an adjustment to the DST transition.

CONCLUSION

Under the new set of social times determined by DST, the adjustment was only partial. I-types delayed bedtime and all groups delayed their wake-up times after the beginning of DST. Consequently, the time in bed after the DST transition was not reduced; Morning (M-types) and Evening-types (E-types) kept the same time in bed and I-types showed an increase on it.

Authors+Show Affiliations

Departmento of Cell Biology and.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

24654884

Citation

Toth Quintilham, Manoel Carlos, et al. "Does the Transition Into Daylight Saving Time Really Cause Partial Sleep Deprivation?" Annals of Human Biology, vol. 41, no. 6, 2014, pp. 554-60.
Toth Quintilham MC, Adamowicz T, Pereira EF, et al. Does the transition into daylight saving time really cause partial sleep deprivation? Ann Hum Biol. 2014;41(6):554-60.
Toth Quintilham, M. C., Adamowicz, T., Pereira, E. F., Pedrazzoli, M., & Louzada, F. M. (2014). Does the transition into daylight saving time really cause partial sleep deprivation? Annals of Human Biology, 41(6), 554-60. https://doi.org/10.3109/03014460.2014.897756
Toth Quintilham MC, et al. Does the Transition Into Daylight Saving Time Really Cause Partial Sleep Deprivation. Ann Hum Biol. 2014 Nov-Dec;41(6):554-60. PubMed PMID: 24654884.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Does the transition into daylight saving time really cause partial sleep deprivation? AU - Toth Quintilham,Manoel Carlos, AU - Adamowicz,Taísa, AU - Pereira,Erico Felden, AU - Pedrazzoli,Mario, AU - Louzada,Fernando Mazzilli, Y1 - 2014/03/24/ PY - 2014/3/25/entrez PY - 2014/3/25/pubmed PY - 2015/6/26/medline KW - Chronotype KW - clock genes KW - daylight saving time KW - sleep–wake cycle SP - 554 EP - 60 JF - Annals of human biology JO - Ann Hum Biol VL - 41 IS - 6 N2 - AIM: To identify possible changes in the sleep patterns according to chronotype in undergraduate students during the daylight saving time (DST) transition. METHODS: A total of 378 students answered the Morningness-Eveningness Questionnaire (MEQ) to determine their chronotype and kept a diary about sleep-wake schedules 1 week before and after the DST transition. Oral mucosal cell samples were collected for genetic analysis. RESULTS: After the DST transition, intermediate types (I-types) delayed bedtime and increased their time in bed and all groups delayed their wake-up time. All groups presented a shorter phase angle between sunset and the bedtime after the DST transition. On the other hand, only E-types showed a tendency to reduce the phase angle between sunrise and wake-up time, while I-types and M-types kept the same phase angles between sunrise and wake-up time after the DST transition. The polymorphisms in the human genes CLOCK and PER3 were not associated with individual differences in sleep patterns, nor were they associated with an adjustment to the DST transition. CONCLUSION: Under the new set of social times determined by DST, the adjustment was only partial. I-types delayed bedtime and all groups delayed their wake-up times after the beginning of DST. Consequently, the time in bed after the DST transition was not reduced; Morning (M-types) and Evening-types (E-types) kept the same time in bed and I-types showed an increase on it. SN - 1464-5033 UR - https://www.unboundmedicine.com/medline/citation/24654884/Does_the_transition_into_daylight_saving_time_really_cause_partial_sleep_deprivation L2 - https://www.tandfonline.com/doi/full/10.3109/03014460.2014.897756 DB - PRIME DP - Unbound Medicine ER -