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Sleep and Breathing

, Volume 22, Issue 3, pp 773–779 | Cite as

Validation of the Korean Munich Chronotype Questionnaire

  • Sooyeon Suh
  • Soo Hyun Kim
  • Hyera Ryu
  • Su Jung Choi
  • Eun Yeon Joo
Neurology • Original Article

Abstract

Purpose

The Munich Chronotype Questionnaire (MCTQ) assesses actual sleep-wake timing and has advantages compared to prior chronotype questionnaires in that it differentiates sleep-wake patterns between work days and free days and uses corrected mid-sleep time on free days after correcting for accumulated sleep debt over the week to categorize chronotype. The current study, we validated the Korean version of the MCTQ.

Methods

In this study, 310 participants (mean age = 27.09 ± 5.64; 78.1% females) completed the Korean version of the MCTQ.

Results

MCTQ parameters were significantly correlated with MEQ (Morningness-Eveningness Questionnaire) scores (│r│ ≥ 0.48), and test-retest reliability was ≥ 0.72. Cutoff scores of 2.5%, which correlated to 2.36 and 8.57 mid-sleep times in our sample, showed the best convergence with MEQ when categorizing chronotype.

Conclusions

Our study suggests that the MCTQ is a useful questionnaire in assessing chronotype in young adults.

Keywords

Sleep Chronotype Munich Chronotype Questionnaire Mid-sleep time Validation 

Notes

Acknowledgments

We thank to Celine Vetter and Till Roenneberg for their help with this study.

Funding

This work was supported by the Sungshin University Research Grant of 2017–1–29-007. This research was supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT and Future Planning, Republic of Korea (2017R1A2B4003120) and by Samsung Biomedical Research Institute grant (#SMO1162071).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Informed consent

Informed consent was obtained from all individual participants included in the study.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Sooyeon Suh
    • 1
    • 2
  • Soo Hyun Kim
    • 1
  • Hyera Ryu
    • 1
  • Su Jung Choi
    • 3
    • 4
  • Eun Yeon Joo
    • 5
    • 6
  1. 1.Department of PsychologySungshin Women’s UniversitySeoulSouth Korea
  2. 2.Department of PsychiatryStanford UniversityPalo AltoUSA
  3. 3.Department of NursingSamsung Medical CenterSeoulSouth Korea
  4. 4.Department of Clinical Nursing Science, Graduate School of Clinical Nursing ScienceSungkyunkwan UniversitySeoulSouth Korea
  5. 5.Department of Neurology, Neuroscience Center, Samsung Biomedical Research Institute, Samsung Medical CenterSungkyunkwan University School of MedicineSeoulSouth Korea
  6. 6.Department of Health Sciences and Technology, SAIHSTSungkyunkwan UniversitySeoulSouth Korea

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