UMIN-ICDS Clinical Trial
| Unique ID issued by UMIN | UMIN000063100 |
|---|---|
| Receipt number | R000071949 |
| Scientific Title | Effects of a Workplace Job Crafting Intervention Program on Work Engagement: A Cluster-Randomized Controlled Trial |
| Date of disclosure of the study information | 2026/10/01 |
| Last modified on | 2026/09/29 17:38:44 |
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Basic information
Public title
Effects of a Workplace Job Crafting Intervention Program on Work Engagement: A Cluster-Randomized Controlled Trial
Acronym
Effects of a Workplace Job Crafting Intervention Program on Work Engagement: A Cluster-Randomized Controlled Trial
Scientific Title
Effects of a Workplace Job Crafting Intervention Program on Work Engagement: A Cluster-Randomized Controlled Trial
Scientific Title:Acronym
Effects of a Workplace Job Crafting Intervention Program on Work Engagement: A Cluster-Randomized Controlled Trial
Region
| Japan |
Condition
Condition
None
Classification by specialty
| Not applicable |
Classification by malignancy
Others
Genomic information
NO
Objectives
Narrative objectives1
To examine the effect of the workplace job crafting intervention program on improving work engagement by a cluster-randomized controlled trial.
Basic objectives2
Efficacy
Basic objectives -Others
Trial characteristics_1
Trial characteristics_2
Developmental phase
Assessment
Primary outcomes
Work engagement (Utrecht Work Engagement Scale: UWES) (Immediately after intervention, 1 month after the end of the intervention)
Key secondary outcomes
For supervisors and subordinates
Job crafting(job crafting scale)
Psychological distress (the Kessler Psychological Distress Scale:K6),
Work performance and absenteeism (The World Health Organization Health and Work Performance Questionnaire (WHO-HPQ) short version)
Workplace social capital (New Brief Job Stress Questionnaire: New BJSQ)
Supervisor support/ Coworker support(Brief Job Stress Questionnaire: BJSQ)
Quantitative job overload(BJSQ)
Job control(BJSQ)
Psychological safety(the psychological safety scale)
Frequency of supervisor-subordinate conversations(original items)
For subordinates only
Leadership(New BJSQ)
Interactional justice(New BJSQ)
Workplace where people compliment each other(New BJSQ)
Workplace where mistakes are acceptable(New BJSQ)
For the intervention group only
Implementation outcomes(Implementation Outcome Scales for Digital Mental Health: iOSDM)
Program completion status (web program system logs)
Program evaluation (e.g., satisfaction, understanding, and comments assessed using quantitative and qualitative data)
Support between supervisors and subordinates (Original items)
Base
Study type
Interventional
Study design
Basic design
Parallel
Randomization
Randomized
Randomization unit
Cluster
Blinding
Open -no one is blinded
Control
No treatment
Stratification
YES
Dynamic allocation
NO
Institution consideration
Blocking
YES
Concealment
Central registration
Intervention
No. of arms
2
Purpose of intervention
Educational,Counseling,Training
Type of intervention
| Behavior,custom |
Interventions/Control_1
Supervisors will be provided a single online training session (approximately 90 minutes) and a 6-week internet-based job crafting intervention program. The intervention will include psychoeducation on job crafting. Subordinates will be also provided a similar 6-week internet-based job crafting intervention program.
Interventions/Control_2
Waitlist
Interventions/Control_3
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
| Not applicable |
Age-upper limit
| Not applicable |
Gender
Male and Female
Key inclusion criteria
<Cluster (workplace) inclusion criterion>
Participation of one supervisor and at least one subordinate in the study
<Individual inclusion criteria>
1) Being a worker
2) For supervisors: having at least one subordinate - For subordinates: having at least one supervisor
Key exclusion criteria
<Individual exclusion criteria>
1) Not providing consent to participate in the study
2) Being currently on leave from work
Target sample size
660
Research contact person
Name of lead principal investigator
| 1st name | Asuka |
| Middle name | |
| Last name | Sakuraya |
Organization
Graduate School of Medicine, The University of Tokyo
Division name
Department of Digital Mental Health
Zip code
113-0033
Address
7-3-1 Hongo, Bunkyo-ku, Tokyo
TEL
03-5800-9621
asuka@m.u-tokyo.ac.jp
Public contact
Name of contact person
| 1st name | Asuka |
| Middle name | |
| Last name | Sakuraya |
Organization
Graduate School of Medicine, The University of Tokyo
Division name
Department of Digital Mental Health
Zip code
113-0033
Address
7-3-1 Hongo, Bunkyo-ku, Tokyo
TEL
03-5800-9621
Homepage URL
asuka@m.u-tokyo.ac.jp
Sponsor or person
Institute
Graduate School of Medicine, The University of Tokyo
Institute
Department
Personal name
Asuka Sakuraya
Funding Source
Organization
Ministry of Education, Culture, Sports, Science and Technology
Organization
Division
Category of Funding Organization
Japanese Governmental office
Nationality of Funding Organization
Other related organizations
Co-sponsor
Name of secondary funder(s)
IRB Contact (For public release)
Organization
The Research Ethics Review Board of Graduate School of Medicine/Faculty of Medicine, the University of Tokyo
Address
7-3-1, Hongo, Bunkyoku, Tokyo
Tel
03-5841-0818
ethics@m.u-tokyo.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 | 10 | Month | 01 | Day |
Related information
URL releasing protocol
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 | 09 | Month | 02 | Day |
Date of IRB
| 2016 | Year | 09 | Month | 16 | Day |
Anticipated trial start date
| 2026 | Year | 10 | Month | 01 | Day |
Last follow-up date
| 2027 | Year | 03 | Month | 31 | Day |
Date of closure to data entry
Date trial data considered complete
Date analysis concluded
Other
Other related information
Primary and secondary outcomes will be analyzed using repeated-measures multilevel mixed-effects models that account for repeated measurements within individuals and clustering of participants within the same worksite. The group x time interaction will be used to evaluate intervention effects. Worksite size (<10 vs. >=10 workers), which is used for stratified randomization, will be included as a covariate. Analyses will follow the intention-to-treat principle. Between-group differences at each time point, effect sizes (Cohen's d) and 95% confidence intervals will also be calculated.
Similar mixed-model analyses will be conducted to examine intervention effects in subgroups defined by worksite size (<10 vs. >=10 workers), cluster-level job crafting (lower vs. higher), and cluster-level work engagement (lower vs. higher). In addition, per-protocol analyses based on program completion status will be conducted as sensitivity analyses.
Management information
Registered date
| 2026 | Year | 09 | Month | 29 | Day |
Last modified on
| 2026 | Year | 09 | Month | 29 | Day |
Link to view the page
Value
https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000071949
