Reliability and validity of the Korean version of Morningness–Eveningness Questionnaire in adults aged 20–39 years

Lee, Jung Hie; Kim, Seong Jae; Lee, Se Yong; Jang, Ki‐Hyo; Kim, In Soo; Duffy, Jeanne F.

doi:10.3109/07420528.2013.867864

Cited by 77 publications

(58 citation statements)

References 44 publications

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“…Daily training would be effective to promote the circadian amplitude, and this masking effect would diminish the difference between chronotypes. The data of the circadian rhythm of activity levels demonstrated that there was a clear difference between ''larks'' and ''owls''; these results are in line with other studies that showed biological differences among chronotypes: Lee et al (2014), using actigraphy, argued that the mean activity acrophase of E-types was nearly 2 h later in the morning than M-types. Moreover, Gupta & Pati (1994) demonstrated that M-types have an earlier circadian oral temperature acrophase than E-types, and this difference was approximately 2 h (Baehr et al, 2000).…”

Section: Discussionsupporting

confidence: 88%

“…The results regarding sleep timing have shown that E-types generally go to bed and wake-up significantly later than M-types on both work and free days; therefore, eveningness is associated with a later bedtime and wake-up time and a shorter time in bed during the week (Giannotti et al, 2002;Kabrita et al, 2014;Lee et al, 2014;Roepke & Duffy, 2010). No data were reported regarding sleep quality.…”

Section: Introductionmentioning

confidence: 94%

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Chronotype influences activity circadian rhythm and sleep: Differences in sleep quality between weekdays and weekend

Vitale

Roveda

Montaruli

et al. 2014

Chronobiology International

277

125

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Several studies have shown the differences among chronotypes in the circadian rhythm of different physiological variables. Individuals show variation in their preference for the daily timing of activity; additionally, there is an association between chronotype and sleep duration/sleep complaints. Few studies have investigated sleep quality during the week days and weekends in relation to the circadian typology using self-assessment questionnaires or actigraphy. The purpose of this study was to use actigraphy to assess the relationship between the three chronotypes and the circadian rhythm of activity levels and to determine whether sleep parameters respond differently with respect to time (weekdays versus the weekend) in Morning-types (M-types), Neither-types (N-types) and Evening-types (E-types). The morningness-eveningness questionnaire (MEQ) was administered to 502 college students to determine their chronotypes. Fifty subjects (16 M-types, 15 N-types and 19 E-types) were recruited to undergo a 7-days monitoring period with an actigraph (Actiwacth® actometers, CNT, Cambridge, UK) to evaluate their sleep parameters and the circadian rhythm of their activity levels. To compare the amplitude and the acrophase among the three chronotypes, we used a one-way ANOVA followed by the Tukey-Kramer post-hoc test. To compare the Midline Estimating Statistic of Rhythm (MESOR) among the three chronotypes, we used a Kruskal-Wallis non-parametric test followed by pairwise comparisons that were performed using Dunn's procedure with a Bonferroni correction for multiple comparisons. The analysis of each sleep parameter was conducted using the mixed ANOVA procedure. The results showed that the chronotype was influenced by sex (χ(2) with p = 0.011) and the photoperiod at birth (χ(2) with p < 0.05). Though the MESOR and amplitude of the activity levels were not different among the three chronotypes, the acrophases compared by the ANOVA post-hoc test were significantly different (p < 0.001). The ANOVA post-hoc test revealed the presence of a significant difference (p < 0.001) between the M-types (14:32 h) and E-types (16:53 h). There was also a significant interaction between the chronotype and four sleep parameters: Sleep end, Assumed Sleep, Immobility Time and Sleep Efficiency. Sleep Efficiency showed the same patterns as did Assumed Sleep and Immobility Time: the Sleep Efficiency of the E-types was poorer than that of the M- and N-types during weekdays (77.9% ± 7.0 versus 84.1% ± 4.9 and 84.1% ± 5.2) but was similar to that measured in the M- and N-types during the weekend. Sleep Latency and Movement and Fragmentation Index were not different among the three chronotypes and did not change on the weekend compared with weekdays. This study highlights two key findings: first, we observed that the circadian rhythm of activity levels was influenced by the chronotype; second, the chronotype had a significant effect on sleep parameters: the E-types had a reduced sleep quality and quantity compared with the M- and N-types during weekdays,...

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Section: Discussionsupporting

confidence: 88%

Section: Introductionmentioning

confidence: 94%

Chronotype influences activity circadian rhythm and sleep: Differences in sleep quality between weekdays and weekend

Vitale

Roveda

Montaruli

et al. 2014

Chronobiology International

277

125

View full text Add to dashboard Cite

show abstract

“…The reliability of the internal consistency and the test–retest, as well as the external validity of the MEQ, have been reported in previous studies [26,27]. The total range for the MEQ score is 16–86, and all of the questions refer to the participant’s personal sleep habits.…”

Section: Methodsmentioning

confidence: 58%

Chronotype and response to training during the polar night: a pilot study

Vitale

Bjoerkesett

Campaña

et al. 2017

International Journal of Circumpolar Health

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Background: An individual’s chronotype influences his or her physiological rhythms. Some studies have looked at the effect of time of day on the responses to exercise, but studies on the effect of long-term training are lacking.Objective: To report the effects of an 8-week training period during the polar night in non-athletes of different chronotypes living at 70°N.Design: In all, 10 morning (M), 10 neither (N) and 10 evening (E) types were recruited, and their aerobic capacity (VO2max), strength, flexibility and balance before and after the training period were tested.Results: 3 E-types, 5 N-types and 6 M-types completed the protocol. An increase in VO2max and strength was observed for the whole group. The best negative correlation (r=–0.5287) was found between the Morningness–Eveningness Questionnaire (MEQ) score and the increase in VO2max, and the best positive correlation (r=0.4395) was found between MEQ and the increase in strength. Changes in balance and flexibility did not show any clear trends.Conclusion: In an environment with no outdoor daylight, it seems that the response to 8 weeks of aerobic training is larger in the E- than in the M-types, although the M-types showed a larger improvement in strength.

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“…The Korean version of Morningness-Eveningness Questionnaire (MEQ-K) [19], the Korean version of Epworth Sleepiness Scale (KESS) [20], and Pittsburgh Sleep Quality Index (PSQI) [21] translated into Korean were administered to 2 011 recruited subjects. Buccal DNA samples were obtained from 400 subjects, who agreed to donate a buccal swab for the genetic study.…”

Section: Subjectsmentioning

confidence: 99%

No association of CLOCK 3111T/C polymorphism with diurnal preference and sleep quality in Korean adults

Kim

Lee

et al. 2015

Sleep Biol. Rhythms

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The CLOCK 3111T/C polymorphism has been associated with evening preference, but most of the following studies did not replicate the original finding.Although several studies suggested that the sleep quality was also influenced by genetic factors, the relationship of CLOCK 3111T/C polymorphism with sleep quality has not been identified in general population. We aimed to examine whether there is a difference in CLOCK 3111T/C polymorphism according to the morningness-eveningness in Korean adults, and to find a difference in sleep quality according to this polymorphism. Forty-five morning type (MT) (age: 43.93 ± 12.51 years, M:F = 14:31), 59 neither type (NT) (age: 35.20 ± 9.53 years, M:F = 20:39), and 52 evening type (ET) (age: 29.08 ± 7.94 years, M:F = 15:37) subjects were finally selected after excluding those with sleep disorders or shift work. The CLOCK 3111T/C was analyzed by DNA sequencing or SNaPshot assay. The genotype distribution, C allele frequency, and proportion of C allele positive subjects were significantly different between the MT, NT and ET groups. There was no significant difference in PSQI scores between the subjects with TC genotype and age-, sex-and ME type-matched subjects with TT genotype (n = 15 for each group). It is difficult to say that our result replicates the previous finding that showed an association of CLOCK 3111C allele with evening preference, for there was no subject with CLOCK 3111CC homozygote in our study. Moreover, the hypothesis that CLOCK 3111T/C polymorphism may be associated with sleep quality was not supported by our study.

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Reliability and validity of the Korean version of Morningness–Eveningness Questionnaire in adults aged 20–39 years

Cited by 77 publications

References 44 publications

Chronotype influences activity circadian rhythm and sleep: Differences in sleep quality between weekdays and weekend

Chronotype influences activity circadian rhythm and sleep: Differences in sleep quality between weekdays and weekend

Chronotype and response to training during the polar night: a pilot study

No association of CLOCK 3111T/C polymorphism with diurnal preference and sleep quality in Korean adults

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