Prevalence and Factors Associated With the Risk of Delayed Sleep-Wake Phase Disorder in Japanese Youth

Tomishima, Sayaka; Komada, Yoko; Tanioka, Kosuke; Okajima, Isa; Inoue, Yuichi

doi:10.3389/fpsyt.2022.878042

Cited by 5 publications

(12 citation statements)

References 48 publications

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“…Many studies have reported a certain relationship between DSWPD and psychological problems or decreased social functioning, although some negative observations have also been reported (21). Cross-sectional studies have shown higher depression and anxiety scores in patients with DSWPD (14,(22)(23)(24)(25), as well as lower healthrelated quality of life (25) and more frequent self-harm and suicidal ideation (26). Individuals with DSWPD may be unable to adjust to school life or employment (12,27) when their symptoms are severe.…”

Section: Symptomatic Characteristics Of Dswpdmentioning

confidence: 99%

“…In contrast, the removal of the constraints of attendance at school or work, the most important social zeitgebers, may worsen the symptom severity of the disorder (28). DSWPD has been suggested to be associated with lower grades in students (23,29) and frequent absenteeism, as well as lower productivity and presenteeism in the working generation (25,30). Socially, patients with DSWPD tend not to enjoy leisure time and are unable to fulfill their household responsibilities (30).…”

Section: Symptomatic Characteristics Of Dswpdmentioning

confidence: 99%

“…The Biological Rhythms Interview of Assessment in Neuropsychiatry (BRIAN) was first developed to measure circadian rhythm dysfunction in patients with bipolar disorder (45). However, our recent studies have shown that BRIAN can be effectively used also for the screening and severity assessment of DSWPD without comorbid psychiatric disorders (25,46).…”

Section: Assessment Of Dswpdmentioning

confidence: 99%

“…These results suggest that DSWPD is possibly more prevalent in the younger generation than in the older generations. Similarly, a recent large Japanese survey estimated that 4.3% of the youth (15-30 years) is at risk for DSWPD (25). The higher prevalence of DSWPD in adolescents and young adults may reflect a preference for a "night owl" lifestyle and biological change in this generation (3,51).…”

Section: Epidemiology Of Dswpdmentioning

confidence: 99%

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Delayed sleep–wake phase disorder and its related sleep behaviors in the young generation

et al. 2023

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Delayed sleep–wake phase disorder (DSWPD) is a sleep disorder in which the habitual sleep–wake timing is delayed, resulting in difficulty in falling asleep and waking up at the desired time. Patients with DSWPD frequently experience fatigue, impaired concentration, sleep deprivation during weekdays, and problems of absenteeism, which may be further complicated by depressive symptoms. DSWPD is typically prevalent during adolescence and young adulthood. Although there are no studies comparing internationally, the prevalence of DSWPD is estimated to be approximately 3% with little racial differences between Caucasians and Asians. The presence of this disorder is associated with various physiological, genetic and psychological as well as behavioral factors. Furthermore, social factors are also involved in the mechanism of DSWPD. Recently, delayed sleep phase and prolonged sleep duration in the young generation have been reported during the period of COVID-19 pandemic-related behavioral restrictions. This phenomenon raises a concern about the risk of a mismatch between their sleep–wake phase and social life that may lead to the development of DSWPD after the removal of these restrictions. Although the typical feature of DSWPD is a delay in circadian rhythms, individuals with DSWPD without having misalignment of objectively measured circadian rhythm markers account for approximately 40% of the cases, wherein the psychological and behavioral characteristics of young people, such as truancy and academic or social troubles, are largely involved in the mechanism of this disorder. Recent studies have shown that DSWPD is frequently comorbid with psychiatric disorders, particularly mood and neurodevelopmental disorders, both of which have a bidirectional association with the pathophysiology of DSWPD. Additionally, patients with DSWPD have a strong tendency toward neuroticism and anxiety, which may result in the aggravation of insomnia symptoms. Therefore, future studies should address the effectiveness of cognitive-behavioral approaches in addition to chronobiological approaches in the treatment of DSWPD.

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Section: Symptomatic Characteristics Of Dswpdmentioning

confidence: 99%

Section: Symptomatic Characteristics Of Dswpdmentioning

confidence: 99%

Section: Assessment Of Dswpdmentioning

confidence: 99%

Section: Epidemiology Of Dswpdmentioning

confidence: 99%

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Delayed sleep–wake phase disorder and its related sleep behaviors in the young generation

et al. 2023

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“…Bedtime procrastination has been regarded as a factor causing sleep problems during the . In addition, the development of the Japanese version of the BPS may help explain the shorter sleep duration of Japanese people in comparison to people from other countries (23)(24)(25). Therefore, this study aimed to develop and con rm the validity and reliability of the Japanese version of the Bedtime Procrastination Scale (BPS-J).…”

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confidence: 99%

Development and Validation of the Japanese Version of the Bedtime Procrastination Scale (BPS-J)

Hazumi

Kawamura

Yoshiike

et al. 2023

Preprint

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Background: The average sleep duration of Japanese people is shorter than that of people from other countries, and bedtime procrastination is suspected to be one of the factors contributing to this issue. This study aimed to develop and validate the Japanese version of the Bedtime Procrastination Scale (BPS-J). Methods: The BPS-J was developed through procedures including the translation and back-translation of the scale, cognitive interviews with 100 participants who reported insufficient sleep syndrome (ISS) using open-ended online questionnaires, and expert checking. To investigate the scale’s validity and reliability, an online survey was conducted with daytime workers aged 20-65 years without sleep disorders other than ISS. Half of the participants were retested using the same survey after 14 days. Participants’ responses to the Brief Self-Control Scale (BSCS), General Procrastination Scale (GPS), and Munich ChronoType Questionnaire (MCTQ), and data on sleep-related variables such as sleep duration on workdays and the days per week of fatigue or sleep loss, sex, and age, were collected. Results: We analyzed data from 574 participants to assess scale validity. We then analyzed data from 280 participants to determine test-retest reliability. Confirmatory factor analyses revealed that the two-factor model without Item 2 was most suitable for the BPS-J, unlike other language versions. Regardless of the full-item model or the model with Item 2 eliminated, sufficient reliability and significant correlations with the BSCS, GPS, MCTQ, and sleep-related variables such as sleep duration per night on work days, days per week of feeling fatigued, and days per week of sleep losswere observed. Logistic and linear regressions showed that the relationships between the BPS-J, sleep-related variables, and MCTQ were maintained after adjusting for sex and age. Conclusion: The BPS-J was found to have sufficient validity and reliability. Further, eliminating Item 2 from the original version of the Bedtime Procrastination Scale was found to be better to adapt the scale for Japanese daytime workers.

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Association between physical activity patterns of working-age adults and social jetlag, depressive symptoms, and presenteeism

Seol,

So,

Murai

et al. 2024

Journal of Occupational Health

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Objectives: This study aimed to evaluate the association of physical activity with social jetlag, depressive symptoms, and presenteeism. Methods: This cross-sectional study included 8,247 working-age adults (females, 44.6%; age, 20–64 years). Social jetlag was defined as the absolute difference between the midpoint of bedtime and wake time on workdays and free days. Depression symptoms were assessed using the Center for Epidemiologic Studies Depression Scale, and presenteeism was evaluated using the Work Functioning Impairment Scale. Exercise habits were classified into four groups based on the World Health Organization guidelines: non-active (NA; n=4,223), insufficiently active (IA; n=3,009: exercise below guideline levels), weekend warriors (WW; n=220: exercise 1–2 times per week meeting guideline levels), and regularly active (RA; n=793: exercise at least 3 days per week meeting guideline levels). Using multiple and Poisson regression analyses, we examined the association between exercise habits and each outcome. Results: Social jetlag, depression, and presenteeism were more favorable with shorter sedentary times and longer durations of moderate- and vigorous-intensity exercise. Compared with the RA group, the NA group had a significantly higher prevalence of social jetlag (prevalence ratio [PR]=1.30), depression (PR=1.31), and presenteeism (PR=1.35). The IA group had a significantly higher prevalence of depression (PR=1.33) and presenteeism (PR=1.38). Conclusions: Exercising with a certain frequency and intensity may help prevent symptoms of depression and social jetlag, and consequently prevent presenteeism.

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Prevalence and Factors Associated With the Risk of Delayed Sleep-Wake Phase Disorder in Japanese Youth

Cited by 5 publications

References 48 publications

Delayed sleep–wake phase disorder and its related sleep behaviors in the young generation

Delayed sleep–wake phase disorder and its related sleep behaviors in the young generation

Development and Validation of the Japanese Version of the Bedtime Procrastination Scale (BPS-J)

Association between physical activity patterns of working-age adults and social jetlag, depressive symptoms, and presenteeism

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