Isa Okajima

Development and validation of the Suicide-related Behaviors Questionnaire-4 items across multiple high-risk populations

Isa Okajima, 宏美 江藤, Yuki Nagaura, Yoriko Kotoku et autres

jp (code pays fourni par la source)

Chronotype and insomnia symptoms in the incidence and persistence of depressive symptoms: An 8-year longitudinal cohort study

Yuta Takano, Isa Okajima, Yukiyoshi Sumi, Hiroshi Kadotani

BACKGROUND: Previous research findings on the association between chronotype and depressive symptoms have relied on cross-sectional studies, and the temporal relationship remains unclear. This study aimed to examine whether insomnia symptoms modify the longitudinal association between chronotype and depressive symptoms. METHODS: This …

jp (code pays fourni par la source)

Association between Bedtime procrastination with daytime satisfaction and smartphone use in young adults

Isa Okajima

jp (code pays fourni par la source)

Association between Bedtime procrastination with daytime satisfaction and smartphone use in young adults

Isa Okajima

jp (code pays fourni par la source)

Comparison of standardized and non-standardized Japanese translations of the Athens Insomnia Scale

Yuta Takano, Isa Okajima, Hiroshi Kadotani, the NinJa Sleep Study Group et autres

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Impact of sleep and psychological flexibility on young adults’ physical and mental well-being

Miho Ishii, Miyu Hakoda, Isa Okajima

Abstract Young adults frequently report sleep issues, especially insomnia, delayed sleep phase, and sleep debt, with each of these contributing to distinct physical and mental well-being issues. This study explored the characteristics of sleep issues (Trisleep; sleep quantity, sleep quality, and sleep–wake …

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Characterizing poor sleep hygiene in chronic insomnia: Implications of addressable and non-addressable factors for sleep hygiene education

Yuta Takano, Isa Okajima, Akiyoshi Shimura, Yuichi Inoue

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Differences in insomnia-related factors between working-age and older adults: A comparison of nocturnal and daytime symptoms

Koyo Higami, Masumi Osao, Isa Okajima

Objective: This study aimed to (1) clarify the characteristics of nocturnal and daytime symptoms among working-age and older adults and (2) classify insomnia types within each age group and examine the characteristics associated with each type. Methods: An online survey was conducted, …

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Sleep debt and depressive symptoms among workers: the mediating role of fatigue

Chie Omichi, Yukiyoshi Sumi, Isa Okajima, Yuji Ozeki et autres

Introduction This study examined whether fatigue mediates the association between sleep debt and depressive symptoms among municipal employees in Japan. Methods This cross-sectional study was conducted as part of the Night in Japan Home Sleep Monitoring Study (NinJaSleep Study) between November 2023 …

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Remission, treatment response, and treatment adherence across the delivery methods of cognitive behavioral therapy for insomnia: A systematic review and meta-analysis of randomized controlled trials

Yuta Takano, Isa Okajima, Masumi Osao, Rui Ibata et autres

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A 2-year follow-up study on the course of at-risk delayed sleep-wake phase disorder in the young generation and its impact on daytime function

Sayaka Tomishima, Yoko Komada, Kosuke Tanioka, Isa Okajima et autres

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Validity and reliability of the generalized pliance and tracking 2-way scale: GPT-2s

Kazuya Inoué, Isa Okajima

This study developed and examined the validity and reliability of a scale that simultaneously measures generalized pliance and tracking with more focus on actions in daily situations. The so-called Generalized Pliance and Tracking 2-way Scale: GPT-2s comprises 16 items (8 items each …

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