Effect of email-delivered CBT-I on insomnia, anxiety, and depression for young adults: a randomized controlled trial

Effect of email-delivered CBT-I on insomnia, anxiety, and depression for young adults: a randomized controlled trial - Effect of email-delivered CBT-I on insomnia, anxiety, and depression for young adults: a randomized controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000043685

Enrollment

Registered

2021-03-20

Start date

2018-01-10

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

insomnia

Interventions

Eight weekly sessions of e-mail delivered CBT-I (REFRESH) Self-monitoring (sleep diary) (SM)

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: (1) university students, (2) a total score of ISI was greater than 10 or more (a psychopathological cut-off point for Japanese version of the ISI).

Exclusion criteria

Exclusion criteria: (1) current or past medical history of mental disorders such as bipolar disorders, schizophrenia spectrum disorders.

Design outcomes

Primary

Measure	Time frame
Insomnia Severity Index (ISI), Depression Anxiety Stress Scale (DASS)	—

Secondary

Measure	Time frame
Sleep Hygiene Practice Scale (SHPS), Dysfunctional Beliefs and Attitudes about Sleep-16 (DBAS-16), The Ford Insomnia Response to Stress Test (FIRST), The Pre-Sleep Arousal Scale (PSAS)	—

Countries

Japan

Contacts

Public ContactIsa Okajima

Tokyo Kasei University Department of Psychological Counseling

okajima-i@tokyo-kasei.ac.jp03-3961-5276

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026