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Association between the Munich Chronotype Questionnaire and Wrist Actigraphy
Jose Arturo Santisteban1, Thomas G Brown1,2, Reut Gruber1,3
1Department of Psychiatry, McGill University, Montreal, QC, Canada.
Sleep Disorders
|June 5, 2018
Summary
The Munich Chronotype Questionnaire (MCTQ) accurately estimates sleep midpoint timing, aligning well with objective actigraphy measures. This validates the MCTQ for assessing chronotype and diagnosing sleep disorders.
Area of Science:
- Sleep Medicine
- Chronobiology
- Circadian Rhythms
Background:
- Chronotype, an individual's sleep-wake timing preference, is crucial for understanding circadian rhythms.
- Accurate chronotype assessment aids in diagnosing circadian rhythm sleep-wake disorders.
- The Munich Chronotype Questionnaire (MCTQ) is a widely used self-report tool, but its accuracy compared to objective measures needs validation.
Purpose of the Study:
- To evaluate the agreement between the chronotype midpoint derived from the MCTQ and objective measurements from wrist actigraphy.
- To determine if self-reported sleep data via MCTQ provides a reliable estimation of sleep timing compared to objective monitoring.
Main Methods:
- 115 participants (aged 18-34) underwent wrist actigraphy for 4-6 consecutive nights to objectively measure sleep patterns.
- The corrected midpoint of sleep on free days was calculated from both self-reported data (MCTQ) and actigraphy.
- Statistical analyses, including t-tests and correlation, were performed to compare the MCTQ-derived midpoint with the actigraphy-derived midpoint.
Main Results:
- The mean corrected midpoint of sleep on free days showed no significant difference between MCTQ (4:56) and actigraphy (4:51) (p = 0.51).
- A strong positive correlation (r = 0.73, p < 0.001) was observed between the MCTQ and actigraphy measurements.
- The 95% limits of agreement indicated substantial overlap between the two measurement methods.
Conclusions:
- The Munich Chronotype Questionnaire (MCTQ) provides a reliable and valid estimation of the corrected midpoint of sleep on free days.
- Actigraphy and MCTQ yield similar results, supporting the use of MCTQ as a practical tool for chronotype assessment in clinical and research settings.
- These findings validate the utility of the MCTQ in diagnosing circadian rhythm sleep-wake disorders by providing comparable data to objective measures.
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