Modified Munich chronotype questionnaire for application to short-interval split sleep of non-shift workers

Mar 18, 2021Chronobiology international

Updated Munich chronotype questionnaire for short-interval split sleep in non-shift workers

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Abstract

A total of 161 participants were recruited to validate a modified version of the Munich Chronotype Questionnaire (MCTQ) for individuals with split sleep patterns.

The modified MCTQ was assessed by comparing sleep-wake timing with the Morningness-Eveningness Questionnaire (MEQ).
Significant correlations were found between original MCTQ parameters and MEQ scores, including midpoint of sleep on work days and free days.
The highest correlation between the modified MCTQ and MEQ was observed in participants with a split sleep pattern within 60 minutes after the first awakening.
The results indicate that the modified MCTQ is valid for determining chronotype in both consolidated and split sleep patterns.

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The Munich Chronotype Questionnaire (MCTQ) has been widely validated among various types of populations. However, determination of chronotype among individuals who have a split sleep pattern with short intervals between the first and second sleep bouts on free days has not yet been reported. This study aimed to validate the MCTQ modified for this purpose by assessing the actual sleep-wake timing against the Morningness-Eveningness Questionnaire (MEQ). The modified calculation for the midpoint of sleep on free days (MSF) of the split sleep pattern considers the second sleep bout as the total sleep duration on free days. We recruited 161 participants (mean age: 38.7 ± 7.8 years; 73% females, 29% with split sleep pattern) were recruited to administer the modified version of the MCTQ and MEQ. All of the MCTQ original parameters: midpoint of sleep on work days (MSW, r = -0.575), midpoint of sleep on free days (MSF, r = -0.568), and midpoint of sleep on free days corrected for sleep debt (MSF,r = -0.566) were significantly correlated with MEQ. The MEQ was further tested against MSF in four conditions of the split sleep pattern. The MSF modified for split sleep within 60 minutes after the first awakening showed highest correlation (r = -0.576) against MEQ score. The results demonstrate the modified version of MCTQ is valid to determine the chronotype in participants who practice consolidated and split sleep patterns. sc

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Modified Munich chronotype questionnaire for application to short-interval split sleep of non-shift workers

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