Impact of sleep problems on loneliness and suicidal ideation: A cohort study

Impact of sleep problems on loneliness and suicidal ideation: A cohort study - Impact of sleep problems on loneliness and suicidal ideation: A cohort study

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000052373

Enrollment

10000

Registered

2023-10-02

Start date

2023-09-01

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

sleep problem

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Community people who have consented to this survey

Exclusion criteria

Exclusion criteria: Community people who did not give their consent to this survey Community people under 18 years of age

Design outcomes

Primary

Measure	Time frame
Athens Insomnia Scale (AIS; Okajima et al., 2013) The Circadian Energy Scale (CIRENS; Ottoni et al., 2011) Subjective sleep variables: Bedtime and wake-up time on weekday and weekend, and real and ideal total sleep time Three-Item Loneliness Scale (TILS; Igarashi, 2019) Suicide index: Self-harm, suicidal ideation, suicide planning, and suicidal impulsivity and control	—

Secondary

Measure	Time frame
Lubben Social Network Scale (LSNS-6; Kurimoto et al., 2011) Ford Insomnia Response to Stress Test (FIRST; Nakajima et al., 2014) Restorative Sleep Questionnaire (RSQ; Itaba et al., 2023) GAD-7 and PHQ-9 (Muramatsu et al., 2014)	—

Countries

Japan

Contacts

Public ContactISA OKAJIMA

Tokyo Kasei Univeristy Faculty of Humanities

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

Outcome results