Isa Okajima - Dissemin

All papers authored by Isa Okajima

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2024 Y. Takano

, I. Okajima

, T. Ando

, S. Iwano

, Y. Inoue

Presenteeism and sleep duration on workdays and days off

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Yuta Takano

, Ayaka Ubara, Naho Machida, Rui Ibata, Isa Okajima

Psychometric properties of the Japanese version of the Insomnia Catastrophizing Scale and relationship of insomnia severity with catastrophic thoughts, safety behaviors, and dysfunctional beliefs

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2023 Rui Ibata

, Yuta Takano, Naho Machida, Ayaka Ubara, Ryo Motoya, Isa Okajima

Development and validation of the Japanese version of the Restorative Sleep Questionnaire in community samples

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Junko Okajima, Isa Okajima

Psychometric Properties of the Japanese Version of the Parental Acceptance and Action Questionnaire in Parents with Infants and Toddlers

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Yuta Takano

, Suguru Iwano

, Takeshi Ando

, Isa Okajima

Sleep Debt Mediates the Relationship between Work-Related Social Factors, Presenteeism, and Well-Being in Japanese Workers

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Isa Okajima

, Hiroshi Kadotani, on behalf of the NinJa Sleep Study Group

Association of Sleep Reactivity and Anxiety Sensitivity with Insomnia-Related Depression and Anxiety among City Government Employees in Japan

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2022 Isa Okajima

Is COVID-Somnia Fact or Fiction?

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Hyojin Nam

, Jinyoung Chang

, Mickey Trockel

, Isa Okajima

, Chien-Ming Yang

, Ngan Yin Chan

, Shirley Li

, Sooyeon Suh

Predictors of dropout in university students participating in an 8-week e-mail-based cognitive-behavioral therapy for insomnia intervention

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Ayaka Ubara, Noriko Tanizawa, Megumi Harata, Sooyeon Suh, Chien-Ming Yang, Xin Li, Isa Okajima

How Does E-mail-Delivered Cognitive Behavioral Therapy Work for Young Adults (18–28 Years) with Insomnia? Mediators of Changes in Insomnia, Depression, Anxiety, and Stress

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2021 Isa Okajima

, Noriko Tanizawa, Megumi Harata, Sooyeon Suh, Chien-Ming Yang, Shirley Xin Li

, Mickey T. Trockel

Can an E-Mail-Delivered CBT for Insomnia Validated in the West Be Effective in the East? A Randomized Controlled Trial

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Kentaro Matsui

, Yoko Komada

, Isa Okajima

, Yoshikazu Takaesu, Kenichi Kuriyama

, Yuichi Inoue

A Cross-Sectional Study of Evening Hyperphagia and Nocturnal Ingestion: Core Constituents of Night Eating Syndrome with Different Background Factors

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Isa Okajima

, Yoko Komada

, Wakako Ito, Yuichi Inoue

Sleep Debt and Social Jetlag Associated with Sleepiness, Mood, and Work Performance among Workers in Japan

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Kazuki Ito

, Hiroshi Kadotani

, Isa Okajima

, Ayaka Ubara, Mamoru Ichikawa, Chie Omichi, Towa Miyamoto, Arichika Matsuda, Yukiyoshi Sumi

, Hirotoshi Kitagawa

Large Questionnaire Survey on Sleep Duration and Insomnia Using the TV Hybridcast System by Japan Broadcasting Corporation (NHK)

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Shintaro Hara, Shunsuke Nonaka, Miho Ishii, Yuko Ogawa, Chien-Ming Yang, Isa Okajima

Validation of the Japanese Version of the Sleep Hygiene Practice Scale

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2020 Yoko Komada

, Isa Okajima

, Tamotsu Kuwata

The Effects of Milk and Dairy Products on Sleep: A Systematic Review

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Isa Okajima

, Towa Miyamoto, Ayaka Ubara, Chie Omichi, Arichika Matsuda, Yukiyoshi Sumi

, Masahiro Matsuo, Kazuki Ito, Hiroshi Kadotani

Evaluation of Severity Levels of the Athens Insomnia Scale Based on the Criterion of Insomnia Severity Index

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All papers authored by Isa Okajima