UMIN-ICDS Clinical Trial
| Unique ID issued by UMIN | UMIN000060335 |
|---|---|
| Receipt number | R000068823 |
| Scientific Title | Awareness of Iron Deficiency without Anemia among Primary Care Physicians: A Randomized Controlled Trial |
| Date of disclosure of the study information | 2026/01/19 |
| Last modified on | 2026/01/13 13:08:23 |
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Basic information
Public title
Awareness of Iron Deficiency without Anemia among Primary Care Physicians
Acronym
J-IDWA Study
Scientific Title
Awareness of Iron Deficiency without Anemia among Primary Care Physicians: A Randomized Controlled Trial
Scientific Title:Acronym
J-IDWA Study
Region
| Japan |
Condition
Condition
Iron deficiency without anemia
Classification by specialty
| Medicine in general | Hematology and clinical oncology | Adult |
Classification by malignancy
Others
Genomic information
NO
Objectives
Narrative objectives1
This study aims to assess awareness of Iron deficiency without anemia among Japanese primary care physicians and to examine whether treatment decisions differ depending on the presence or absence of anemia, using hypothetical case scenarios.
Basic objectives2
Others
Basic objectives -Others
clinical management practices
Trial characteristics_1
Trial characteristics_2
Developmental phase
Assessment
Primary outcomes
Proportion of physicians who measured serum ferritin levels
Key secondary outcomes
Proportion of physicians who prescribe iron therapy.
Criteria used by physicians to determine whether to discontinue oral or intravenous iron therapy.
Serum ferritin cut-off values used by physicians for the diagnosis of iron deficiency.
Factors associated with physicians' decision on whether to measure serum ferritin levels.
Base
Study type
Interventional
Study design
Basic design
Parallel
Randomization
Randomized
Randomization unit
Individual
Blinding
Single blind -investigator(s) and assessor(s) are blinded
Control
Dose comparison
Stratification
Dynamic allocation
Institution consideration
Blocking
Concealment
Intervention
No. of arms
2
Purpose of intervention
Diagnosis
Type of intervention
| Other |
Interventions/Control_1
Presentation of a hypothetical clinical case without anemia
Interventions/Control_2
Presentation of a hypothetical clinical case with anemia
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
physician members of the Japan Primary Care Association (JPCA)
Key exclusion criteria
non-physicians
Target sample size
110
Research contact person
Name of lead principal investigator
| 1st name | Yoriko |
| Middle name | |
| Last name | Matsuyama |
Organization
Hashimoto Municipal Hospital
Division name
Department of General Internal Medicine
Zip code
648-0005
Address
2-8-1 Ominedai, Hashimoto City, Wakayama, Japan
TEL
0736-37-1200
ymatsuyama@hasimoto-hsp.jp
Public contact
Name of contact person
| 1st name | Yoriko |
| Middle name | |
| Last name | Matsuyama |
Organization
Hashimoto Municipal Hospital
Division name
Department of General Internal Medicine
Zip code
648-0005
Address
2-8-1 Ominedai, Hashimoto City, Wakayama, Japan
TEL
0736-37-1200
Homepage URL
ymatsuyama@hasimoto-hsp.jp
Sponsor or person
Institute
Hashimoto Municipal Hospital
Institute
Department
Personal name
Yoriko Matsuyama
Funding Source
Organization
None
Organization
Division
Category of Funding Organization
Self funding
Nationality of Funding Organization
Other related organizations
Co-sponsor
Name of secondary funder(s)
IRB Contact (For public release)
Organization
Hashimoto Municipal Hospital
Address
2-8-1 Ominedai, Hashimoto City, Wakayama, Japan
Tel
0736-37-1200
iji@hashimoto-hsp.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 | 19 | 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
| 2025 | Year | 10 | Month | 22 | Day |
Date of IRB
| 2025 | Year | 10 | Month | 31 | Day |
Anticipated trial start date
| 2026 | Year | 01 | Month | 20 | Day |
Last follow-up date
| 2026 | Year | 03 | Month | 31 | 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 | 01 | Month | 13 | Day |
Last modified on
| 2026 | Year | 01 | Month | 13 | Day |
Link to view the page
Value
https://center6.umin.ac.jp/cgi-open-bin/icdr_e/ctr_view.cgi?recptno=R000068823
