Validation of the Korean Munich Chronotype Questionnaire

Sleep Breath. 2018 Sep;22(3):773-779. doi: 10.1007/s11325-017-1609-z. Epub 2018 Jan 16.


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: Chronotype; Mid-sleep time; Munich Chronotype Questionnaire; Sleep; Validation.

Publication types

  • Validation Study

MeSH terms

  • Adult
  • Circadian Rhythm / physiology*
  • Female
  • Humans
  • Korea
  • Male
  • Pilot Projects
  • Reproducibility of Results
  • Sleep / physiology*
  • Surveys and Questionnaires / standards*
  • Time Factors
  • Translations
  • Wakefulness / physiology
  • Young Adult