Daytime sleepiness and sleep parameters in children living in the European North of Russia

Коломейчук, С. Н.; Morozov, A. I.; Petrashova, D. A.; Pozharskaya, V.V.; Stafeeva, E.B.; Виноградова, И. А.; Bochkarev, Mikhail; Tarasov, B.A.

doi:10.25789/ymj.2019.67.26

Cited by 2 publications

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“…The mean scores of excessive daytime sleepiness between two subgroups of Russian schoolchildren were lower than the data published in the original version of the questionnaire [ 31 ], but consistent with the results obtained previously by our group [ 54 , 55 ], and in Germany [ 24 ], the USA [ 56 ], and Korea [ 57 ]. This difference was associated with the age of the analyzed sample.…”

Section: Discussionsupporting

confidence: 90%

“…Moreover, it is worth noting the seasonal impact on our data. Previously, we published a paper on the seasonal dynamics of excessive daytime sleepiness in the Russian Arctic [ 55 ]. The general level of daytime sleepiness determined in our sample, as well as in both subgroups, was lower than the clinical threshold determined at 18% according to Yang [ 58 ].…”

Section: Discussionmentioning

confidence: 99%

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Comparative Analysis of Sleep Hygiene and Patterns among Adolescents in Two Russian Arctic Regions: A Pilot Study

Kolomeichuk,

Korostovtseva,

Morozov

et al. 2024

Children

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Purpose: The circumpolar habitat stands as one of the most vulnerable environments for human activity and health. The primary study objective was to compare sleep-related factors, light exposure, social cues, and potential confounding variables among schoolchildren residing in the European Arctic region from two settlements situated below and above the Polar Circle using validated self-reported questionnaires. Materials and Methods: We recruited 94 children aged 13–15 years (40.4% males), matched by sex and age, from public educational institutions in two circumpolar settlements located below (Kem’, Republic of Karelia; 64.6 NL) and above the Polar Circle (Apatity, Murmansk Region; 67.3 NL). Participants completed several surveys, including the Pediatric Daytime Sleepiness Scale, the Insomnia Severity Index, the Adolescent Sleep Hygiene Scale, and the Munich ChronoType Questionnaire, to evaluate sleep parameters and chronotype. The χ2 test was used to test for differences between proportions. Linear regression and multiple regression models with co-factors were applied to assess the relationship between studied indicators. Results: A noteworthy increase in physical activity was observed in children residing in Kem’ compared to those in Apatity. Children from Apatity showed higher alcohol consumption than their counterparts from Kem’. The overall rate of excessive daytime sleepiness in the sample was 17.1%. Moderate insomnia symptoms were reported in 18.4% of adolescents living in Kem’ and in 25% of respondents living in Apatity, respectively. Notably, participants from Kem’ attained higher academic scores and had longer exposure to sunlight on schooldays. On the other hand, children from Apatity tended to have later bedtimes and sleep-onset times on schooldays. According to the Munich ChronoType Questionnaire data, a reliance on alarm clocks on schooldays, and a higher Sleep Stability Factor based on the Adolescent Sleep Hygiene Scale. Discussion: Our study indicating that higher physical activity and longer sunlight exposure among Kem’ children on schooldays are associated with earlier wake-up times during schooldays, earlier bedtime whole week, reduced dependence on alarm clocks, and higher academic achievements. The results of older schoolchildren differ from many works published previously in the USA, Argentina, and Japan, which could be explained by the season when the study was performed. Here, we observed a negative impact on school performance and sleep parameters in children living in high latitudes, namely in circumpolar regions. Conclusions: Our study points out that adolescents living above the Polar Circle tend to have sleep problems, e.g., late sleep-onset times, higher excessive daytime sleepiness, and insomnia-related symptoms, because of experiencing reduced exposure to natural light. Future research encompassing assessments across all four seasons will provide a more comprehensive understanding.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Comparative Analysis of Sleep Hygiene and Patterns among Adolescents in Two Russian Arctic Regions: A Pilot Study

Kolomeichuk,

Korostovtseva,

Morozov

et al. 2024

Children

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“…We previously did the pilot study to find seasonal changes in PDSS across European part of Russian North. 35 Preliminary findings indicated higher PDSS values during autumn-winter time when compared to spring. We did not analyze sleep parameters in that work, 35 so we plan to perform the original study simultaneously in low and high latitudes.…”

Section: Discussionmentioning

confidence: 84%

“…35 Preliminary findings indicated higher PDSS values during autumn-winter time when compared to spring. We did not analyze sleep parameters in that work, 35 so we plan to perform the original study simultaneously in low and high latitudes. This would give an insight into the relationship between latitude and day length on the one side and daytime sleepiness.…”

Section: Discussionmentioning

confidence: 84%

“…Cultural differences could also affect sleep habits and related issues. 16,35,38 For example, van Litsenburg 14 reported that Dutch scholars experienced more sleep disturbances compared with their counterparts in the United States and China. 14 Dutch children also reported more problems with specific sleep parameters compared to those in the United States and China.…”

Section: Discussionmentioning

confidence: 99%

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Social Jetlag and Excessive Daytime Sleepiness from a Sample of Russian Children and Adolescents

Коломейчук

Randler

Morozov

et al. 2021

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Purpose Insufficient nocturnal sleep is a primary source of excessive daytime sleepiness. Most previous research has focused on the disparity between sleep demands and study start times in adolescents. Fewer studies have focused on elementary schoolchildren. We hypothesize that late sleep timing is connected to excessive daytime sleepiness in a sample of Russian children and adolescents. The major goals of our study were to evaluate excessive daytime sleepiness in Russian schoolchildren and adolescents using the Russian version of the Pediatric Daytime Sleepiness Scale (PDSS) and to estimate its relationship with sleep-wake parameters using the Munich Chronotype Questionnaire (MCTQ). Materials and Methods Student subjects were from public educational facilities in the Republic of Karelia. They completed both the PDSS and the Munich Chronotype Questionnaire to estimate sleep parameters and chronotype (MSFsc). Five hundred and eleven students provided data for the PDSS and sleep-wake variables, and 479 for the full MCTQ data. Results The overall prevalence of Excessive Daytime Sleepiness (EDS) in our sample was 18%. The total PDSS score was inversely correlated with sleep length on school nights and was independent of respondents’ sex. Higher PDSS scores were associated with later bedtimes on school days and free days, and shorter sleep duration on school days. Late chronotype and more pronounced social jetlag were both positively correlated with high PDSS scores. A negative correlation was found between chronotype and the duration of the sleep period on weekdays ( p < 0.001) and a positive correlation was found on weekends ( p < 0.001). Longer average sleep duration was positively related to less daytime sleepiness. Conclusion This study suggests that excessive daytime sleepiness is chronotype-dependent. School start times could be shifted to a later hour to prolong sleep and reduce EDS.

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Daytime sleepiness and sleep parameters in children living in the European North of Russia

Cited by 2 publications

References 0 publications

Comparative Analysis of Sleep Hygiene and Patterns among Adolescents in Two Russian Arctic Regions: A Pilot Study

Comparative Analysis of Sleep Hygiene and Patterns among Adolescents in Two Russian Arctic Regions: A Pilot Study

Social Jetlag and Excessive Daytime Sleepiness from a Sample of Russian Children and Adolescents

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