UMIN-ICDS Clinical Trial
| Unique ID issued by UMIN | UMIN000062802 |
|---|---|
| Receipt number | R000071895 |
| Scientific Title | Effects of autobiographical memory recall using an online odor diary on olfactory function in older adults |
| Date of disclosure of the study information | 2026/09/10 |
| Last modified on | 2026/09/03 13:52:50 |
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Basic information
Public title
Effects of autobiographical memory recall using an online odor diary on olfactory function in older adults
Acronym
Online Odor Diary Study
Scientific Title
Effects of autobiographical memory recall using an online odor diary on olfactory function in older adults
Scientific Title:Acronym
Odor Diary Olfactory Training Study
Region
| Japan |
Condition
Condition
Healthy older adults
Classification by specialty
| Not applicable |
Classification by malignancy
Others
Genomic information
NO
Objectives
Narrative objectives1
The purpose of this study is to examine the effects of a three-month online odor diary intervention on olfactory function in older adults. Participants will record odors encountered in their daily lives and recall autobiographical memories associated with these odors. Our previous research suggested that a one-month intervention involving odor-evoked autobiographical memory recall may improve olfactory identification ability. The present study extends the intervention period to three months to examine the effects of a longer-term intervention on olfactory function.
Basic objectives2
Efficacy
Basic objectives -Others
Trial characteristics_1
Trial characteristics_2
Developmental phase
Assessment
Primary outcomes
Olfactory identification ability assessed using the Open Essence odor identification test. Olfactory identification will be assessed before and after the three-month intervention, and changes in Open Essence scores from pre- to post-intervention will be evaluated.
Key secondary outcomes
Base
Study type
Interventional
Study design
Basic design
Single arm
Randomization
Non-randomized
Randomization unit
Blinding
Open -no one is blinded
Control
Uncontrolled
Stratification
NO
Dynamic allocation
NO
Institution consideration
Institution is not considered as adjustment factor.
Blocking
NO
Concealment
No need to know
Intervention
No. of arms
1
Purpose of intervention
Educational,Counseling,Training
Type of intervention
| Behavior,custom |
Interventions/Control_1
Participants will complete an online odor-autobiographical memory diary for three months. In their daily lives, participants will attend to odors they encounter and use an odor that was particularly memorable as a cue to recall a personally experienced past event (autobiographical memory). They will record the odor and the recalled autobiographical memory in the online diary throughout the intervention period.
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
| 65 | years-old | <= |
Age-upper limit
| 75 | years-old | >= |
Gender
Male and Female
Key inclusion criteria
1. Adults aged 65 years or older.
2. Individuals who are independent in activities of daily living.
3. Individuals who are able to complete the online odor diary for three months.
4. Individuals who have received an explanation of the study and provided informed consent to participate.
Key exclusion criteria
1. Individuals diagnosed with dementia.
2. Individuals with diseases or medical histories that may substantially affect olfactory function.
3. Individuals considered by the investigators to be unable to participate in or complete the three-month intervention.
Target sample size
50
Research contact person
Name of lead principal investigator
| 1st name | Kohsuke |
| Middle name | |
| Last name | Yamamoto |
Organization
Hosei University
Division name
Faculty of Science and Engineering
Zip code
184-8584
Address
3-7-2 Kajino-cho, Koganei-shi, Tokyo
TEL
042-387-6118
kyamamoto@hosei.ac.jp
Public contact
Name of contact person
| 1st name | Kohsuke |
| Middle name | |
| Last name | Yamamoto |
Organization
Hosei University
Division name
Faculty of Science and Engineering
Zip code
184-8584
Address
3-7-2 Kajino-cho, Koganei-shi, Tokyo
TEL
042-387-6118
Homepage URL
kyamamoto@hosei.ac.jp
Sponsor or person
Institute
Hosei University
Institute
Department
Personal name
Funding Source
Organization
Japan Society for the Promotion of Science
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
Research Ethics Committee for Human Subjects, Faculty of Science and Engineering, Hosei University
Address
3-7-2 Kajino-cho, Koganei-shi, Tokyo
Tel
042-387-6008
torikai@hosei.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 | 09 | Month | 10 | 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 | 05 | Day |
Date of IRB
Anticipated trial start date
| 2026 | Year | 09 | Month | 09 | Day |
Last follow-up date
| 2026 | Year | 12 | Month | 28 | Day |
Date of closure to data entry
Date trial data considered complete
Date analysis concluded
Other
Other related information
Management information
Registered date
| 2026 | Year | 09 | Month | 03 | Day |
Last modified on
| 2026 | Year | 09 | Month | 03 | Day |
Link to view the page
Value
https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000071895
