UMIN-ICDS Clinical Trial
| Unique ID issued by UMIN | UMIN000060534 |
|---|---|
| Receipt number | R000069247 |
| Scientific Title | Survey on the Understanding of Placebos in Japan |
| Date of disclosure of the study information | 2026/01/31 |
| Last modified on | 2026/01/31 11:58:08 |
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Basic information
Public title
Survey on the Understanding of Placebos in Japan
Acronym
Survey on the Understanding of Placebos
Scientific Title
Survey on the Understanding of Placebos in Japan
Scientific Title:Acronym
Survey on the Understanding of Placebos
Region
| Japan |
Condition
Condition
Healthy Adults
Classification by specialty
| Adult |
Classification by malignancy
Others
Genomic information
NO
Objectives
Narrative objectives1
To investigate the general Japanese population's level of knowledge about placebo and the placebo effect, their preference for explanations, and their willingness and acceptance of placebo use in treatment.
Basic objectives2
Others
Basic objectives -Others
Comparison with a previous study (Dutch-speaking population)
Trial characteristics_1
Exploratory
Trial characteristics_2
Developmental phase
Assessment
Primary outcomes
Knowledge and Acceptability Scores of Placebos
Key secondary outcomes
Placebo Quiz score, willingness to participate in each treatment, responses for preferring specific explanations of placebo effects
Optimism and pessimism scores, Five-factor model of personality, Trait anxiety
Base
Study type
Observational
Study design
Basic design
Randomization
Randomization unit
Blinding
Control
Stratification
Dynamic allocation
Institution consideration
Blocking
Concealment
Intervention
No. of arms
Purpose of intervention
Type of intervention
Interventions/Control_1
Interventions/Control_2
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
| 18 | years-old | <= |
Age-upper limit
| Not applicable |
Gender
Male and Female
Key inclusion criteria
Healthy adults aged 18 years or older.
Native Japanese speakers with the ability to understand and respond in Japanese.
Key exclusion criteria
No specific exclusion criteria were defined.
Target sample size
400
Research contact person
Name of lead principal investigator
| 1st name | Yoshiyuki |
| Middle name | |
| Last name | Hirano |
Organization
Chiba University
Division name
Research Center for Child Mental Development
Zip code
260-8670
Address
1-8-1 Inohana, Chuo-ku, Chiba-shi, Chiba
TEL
043-226-2975
hirano@chiba-u.jp
Public contact
Name of contact person
| 1st name | Yasuka |
| Middle name | |
| Last name | Sahara |
Organization
Chiba University
Division name
Graduate School of Medicine Cogntive Behavioral Physiology
Zip code
260-8670
Address
1-8-1 Inohana, Chuo-ku, Chiba-shi, Chiba
TEL
043-226-2027
Homepage URL
22fd0144@student.gs.chiba-u.jp
Sponsor or person
Institute
Chiba University
Institute
Department
Personal name
Funding Source
Organization
Chiba University
Organization
Division
Category of Funding Organization
Other
Nationality of Funding Organization
Other related organizations
Co-sponsor
Name of secondary funder(s)
IRB Contact (For public release)
Organization
Research ethics committee of Chiba University
Address
1-8-1Inohaba, Chuo-ku, Chiba, Chiba
Tel
043-251-1111
inohana-rinri@chiba-u.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 | 01 | Month | 31 | 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 | 01 | Month | 21 | Day |
Date of IRB
Anticipated trial start date
| 2026 | Year | 02 | Month | 01 | Day |
Last follow-up date
| 2026 | Year | 02 | Month | 28 | Day |
Date of closure to data entry
Date trial data considered complete
Date analysis concluded
Other
Other related information
Observational study
Web-based questionnaire survey
Management information
Registered date
| 2026 | Year | 01 | Month | 31 | Day |
Last modified on
| 2026 | Year | 01 | Month | 31 | Day |
Link to view the page
Value
https://center6.umin.ac.jp/cgi-open-bin/icdr_e/ctr_view.cgi?recptno=R000069247
