Ayaka Ubara

Tokyo, Japan

Last Updated: 09/26/2026

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Found 12 publications

Corrigendum: Limited social support is associated with depression, anxiety, and insomnia in a Japanese working population.

Corrigendum: Limited social support is associated with depression, anxiety, and insomnia in a Japanese working population.

Journal: Frontiers in public health

Published: June 17, 2024

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

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

Journal: Sleep medicine

Published: September 18, 2023

Effect of cognitive behavioral therapy for insomnia in workers: A systematic review and meta-analysis of randomized controlled trials.

Effect of cognitive behavioral therapy for insomnia in workers: A systematic review and meta-analysis of randomized controlled trials.

Journal: Sleep medicine reviews

Published: April 21, 2023

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

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

Journal: Sleep medicine

Published: March 13, 2023

Limited social support is associated with depression, anxiety, and insomnia in a Japanese working population.

Limited social support is associated with depression, anxiety, and insomnia in a Japanese working population.

Journal: Frontiers in public health

Published: August 05, 2022

Obstructive Sleep Apnoea Severity Is Negatively Associated with Depressive Symptoms: A Cross-Sectional Survey of Outpatients with Suspected Obstructive Sleep Apnoea in Japan.

Obstructive Sleep Apnoea Severity Is Negatively Associated with Depressive Symptoms: A Cross-Sectional Survey of Outpatients with Suspected Obstructive Sleep Apnoea in Japan.

Journal: International journal of environmental research and public health

Published: March 15, 2022

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.

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.

Journal: International journal of environmental research and public health

Published: February 22, 2022

Prolonged Sleep Latency and Reduced REM Latency Are Associated with Depressive Symptoms in a Japanese Working Population.

Prolonged Sleep Latency and Reduced REM Latency Are Associated with Depressive Symptoms in a Japanese Working Population.

Journal: International journal of environmental research and public health

Published: January 08, 2022

Minor hallucinations in isolated rapid eye movement sleep behavior disorder indicative of early phenoconversion: A preliminary study.

Minor hallucinations in isolated rapid eye movement sleep behavior disorder indicative of early phenoconversion: A preliminary study.

Journal: Acta neurologica Scandinavica

Published: August 06, 2021

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

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

Journal: International journal of environmental research and public health

Published: February 06, 2021

Self-Isolation Due to COVID-19 Is Linked to Small One-Year Changes in Depression, Sleepiness, and Insomnia: Results from a Clinic for Sleep Disorders in Shiga Prefecture, Japan.

Self-Isolation Due to COVID-19 Is Linked to Small One-Year Changes in Depression, Sleepiness, and Insomnia: Results from a Clinic for Sleep Disorders in Shiga Prefecture, Japan.

Journal: International journal of environmental research and public health

Published: October 28, 2020

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

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

Journal: International journal of environmental research and public health

Published: October 11, 2020

Showing 1-12 of 12

Last Updated: 09/26/2026