UMIN-ICDS Clinical Trial
| Unique ID issued by UMIN | UMIN000062101 |
|---|---|
| Receipt number | R000070899 |
| Scientific Title | The Efficacy of a Program to Address Bedtime Procrastination Based on Temporal Motivation Theory: A Three-Group Randomized Controlled Trial Among College Students |
| Date of disclosure of the study information | 2026/06/30 |
| Last modified on | 2026/06/30 14:50:30 |
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Basic information
Public title
The Efficacy of a Program to Address Bedtime Procrastination Based on Temporal Motivation Theory: A Three-Group Randomized Controlled Trial Among College Students
Acronym
Intervention to Reduce Bedtime Procrastination
Scientific Title
The Efficacy of a Program to Address Bedtime Procrastination Based on Temporal Motivation Theory: A Three-Group Randomized Controlled Trial Among College Students
Scientific Title:Acronym
Intervention to Reduce Bedtime Procrastination
Region
| Japan |
Condition
Condition
Bedtime Procrastination in College Students
Classification by specialty
| Adult |
Classification by malignancy
Others
Genomic information
NO
Objectives
Narrative objectives1
This study aims to examine whether a program to address bedtime procrastination based on temporal motivation theory in college students leads to a reduction of bedtime procrastination.
Basic objectives2
Efficacy
Basic objectives -Others
Trial characteristics_1
Confirmatory
Trial characteristics_2
Developmental phase
Assessment
Primary outcomes
We examine whether there is difference in the reduction in the scores of Bedtime Procrastination Scale (BPS) at the end of program period (2 weeks later) between the Experimental group and two control groups.
Key secondary outcomes
･Duration of bedtime procrastination on weekdays and weekends (difference between actual bedtime and planned bedtime)
･Daytime performance
･Sleep duration on weekdays and weekends
Base
Study type
Interventional
Study design
Basic design
Parallel
Randomization
Randomized
Randomization unit
Individual
Blinding
Single blind -participants are blinded
Control
Active
Stratification
YES
Dynamic allocation
NO
Institution consideration
Institution is not considered as adjustment factor.
Blocking
YES
Concealment
Central registration
Intervention
No. of arms
3
Purpose of intervention
Educational,Counseling,Training
Type of intervention
| Behavior,custom |
Interventions/Control_1
Name: Sleep Education, Daily exercises, and Sleep Diary to Reduce Bedtime Procrastination Using LINE Bot
Description: On Day 1, participants set goals and develop plans to reduce bedtime procrastination (pre-study exercises) . During the two-week intervention period, participants will receive a message on LINE at 7:00 a.m. to develop a plan for reducing bedtime procrastination that day (daily exercises) and record their bedtime and wake-up time from the previous night (sleep diary). At 5:00 p.m., they will receive a message on LINE to develop a plan for reducing bedtime procrastination that day (daily exercises) and record their planned bedtime for that day (sleep diary).
Interventions/Control_2
Name: Sleep Education and Daily Sleep Diary to Reduce Bedtime Procrastination Using LINE Bot
Description: The program will be conducted excluding the daily exercises from Intervention 1.
Interventions/Control_3
Name: Sleep Education to Reduce Bedtime Procrastination Using LINE Bot
Description: The program will be conducted excluding the daily exercises and sleep diary from Intervention 1.
Interventions/Control_4
Interventions/Control_5
Interventions/Control_6
Interventions/Control_7
Interventions/Control_8
Interventions/Control_9
Interventions/Control_10
Eligibility
Age-lower limit
| 18 | years-old | <= |
Age-upper limit
| Not applicable |
Gender
Male and Female
Key inclusion criteria
Your actual sleep duration on weekdays is at least one hour shorter than the ideal amount of sleep you truly need.
You may sometimes regret staying up late or feel the need to change this habit.
The term "staying up late" as used here refers to situations where, due to reasons you can control - such as leisure activities - you end up going to bed later than planned even though you originally intended to go to bed earlier. This does not include situations where your bedtime is delayed due to reasons beyond your control, such as part-time jobs or commitments to others.
Undergraduate and graduate students aged 18 or older residing in the Sendai metropolitan area
Native Japanese speakers
Individuals who own a smartphone and use the mobile messaging app "LINE" (for program participation)
Key exclusion criteria
Currently working night shifts starting at midnight or later
Having been diagnosed with a mental illness or sleep disorder, and never having received outpatient treatment or other medical care for mental health or sleep issues
Currently participating in another study across multiple days at the time of participation in this study
Enrolled in the Clinical Psychology Course in the Faculty of Education or the Graduate School of Education at the time of the study
Having participated in the preliminary survey conducted in the 2025 academic year
Target sample size
100
Research contact person
Name of lead principal investigator
| 1st name | shion |
| Middle name | |
| Last name | miyagawa |
Organization
Tohoku University
Division name
Graduate School of Education, Clinical Psychology Course
Zip code
980-8576
Address
27-1 Kawauchi, Aoba Ward, Sendai City, Miyagi
TEL
08031692392
miyagawa.shion.r3@dc.tohoku.ac.jp
Public contact
Name of contact person
| 1st name | shion |
| Middle name | |
| Last name | miyagawa |
Organization
Tohoku University
Division name
Graduate School of Education, Clinical Psychology Course
Zip code
980-8576
Address
27-1 Kawauchi, Aoba Ward, Sendai City, Miyagi
TEL
080-3169-2392
Homepage URL
https://osf.io/qg8dp/overview?view_only=84eebc707ba14c97a8e5fe1a367fd71d
miyagawa.shion.r3@dc.tohoku.ac.jp
Sponsor or person
Institute
Tohoku University
Institute
Department
Personal name
Miyagawa Shion
Funding Source
Organization
Tohoku University
Organization
Division
Category of Funding Organization
Local Government
Nationality of Funding Organization
Japan
Other related organizations
Co-sponsor
Name of secondary funder(s)
IRB Contact (For public release)
Organization
Ethics Review Committee for "Medical Research Involving Human Subjects" at Tohoku University's Kawauchi South Campus
Address
27-1 Kawauchi, Aoba Ward, Sendai City, Miyagi
Tel
022-795-6003
mh125001@sun.ac.jp
Secondary IDs
Secondary IDs
NO
Study ID_1
Org. issuing International ID_1
Study ID_2
Org. issuing International ID_2
IND to MHLW
Institutions
Institutions
Other administrative information
Date of disclosure of the study information
| 2026 | Year | 06 | Month | 30 | Day |
Related information
URL releasing protocol
https://osf.io/qg8dp/overview?view_only=84eebc707ba14c97a8e5fe1a367fd71d
Publication of results
Unpublished
Result
URL related to results and publications
Number of participants that the trial has enrolled
Results
Results date posted
Results Delayed
Results Delay Reason
Date of the first journal publication of results
Baseline Characteristics
Participant flow
Adverse events
Outcome measures
Plan to share IPD
IPD sharing Plan description
Progress
Recruitment status
Preinitiation
Date of protocol fixation
| 2026 | Year | 06 | Month | 30 | Day |
Date of IRB
| 2026 | Year | 04 | Month | 29 | Day |
Anticipated trial start date
| 2026 | Year | 07 | Month | 03 | Day |
Last follow-up date
| 2026 | Year | 09 | Month | 30 | Day |
Date of closure to data entry
| 2026 | Year | 10 | Month | 31 | Day |
Date trial data considered complete
| 2026 | Year | 11 | Month | 30 | Day |
Date analysis concluded
| 2026 | Year | 12 | Month | 31 | Day |
Other
Other related information
Detailed information, such as analytical methods, will be described in the protocol. The protocol will be uploaded to OSF after UMIN registration is completed, and the UMIN URL will then be added to the protocol.
URL: https://osf.io/qg8dp/overview?view_only=84eebc707ba14c97a8e5fe1a367fd71d
Management information
Registered date
| 2026 | Year | 06 | Month | 30 | Day |
Last modified on
| 2026 | Year | 06 | Month | 30 | Day |
Link to view the page
Value
https://center6.umin.ac.jp/cgi-open-bin/icdr_e/ctr_view.cgi?recptno=R000070899
