UMIN-CTR Clinical Trial
| Unique ID issued by UMIN | UMIN000060826 |
|---|---|
| Receipt number | R000069589 |
| Scientific Title | Examination of office chairs with a lower risk of low back pain |
| Date of disclosure of the study information | 2026/03/09 |
| Last modified on | 2026/03/05 09:21:06 |
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Basic information
Public title
Comfortable office chair project II
Acronym
Comfortable office chair II
Scientific Title
Examination of office chairs with a lower risk of low back pain
Scientific Title:Acronym
Comfortable office chair II
Region
| Japan |
Condition
Condition
Healthy
Classification by specialty
| Not applicable | Adult |
Classification by malignancy
Others
Genomic information
NO
Objectives
Narrative objectives1
We have demonstrated that reduced trunk movement during sitting is strongly associated with the worsening of low back pain. In this study, desk workers will use different types of chairs equipped with sensors that detect movement during sitting in their workplace. The aim is to identify chair types that do not restrict trunk movement and are less likely to lead to the aggravation of low back pain.
Basic objectives2
Efficacy
Basic objectives -Others
Trial characteristics_1
Trial characteristics_2
Developmental phase
Assessment
Primary outcomes
Grade of low back pain
Key secondary outcomes
Trunk movement derived from AI-based analysis of sensor outputs.
Base
Study type
Interventional
Study design
Basic design
Cross-over
Randomization
Non-randomized
Randomization unit
Blinding
Double blind -all involved are blinded
Control
Placebo
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
7
Purpose of intervention
Prevention
Type of intervention
| Other |
Interventions/Control_1
Seat type 1
5days/week x 2 weeks
Interventions/Control_2
Seat type 2
5days/week x 2 weeks
Interventions/Control_3
Seat type 3
5days/week x 2 weeks
Interventions/Control_4
Seat type 4
5days/week x 2 weeks
Interventions/Control_5
Seat type 5
5days/week x 2 weeks
Interventions/Control_6
Seat type 6
5days/week x 2 weeks
Interventions/Control_7
Control (standard commercially available seat)
5days/week x 2 weeks
Interventions/Control_8
Interventions/Control_9
Interventions/Control_10
Eligibility
Age-lower limit
| 20 | years-old | <= |
Age-upper limit
| 70 | years-old | >= |
Gender
Male and Female
Key inclusion criteria
Individuals who work while seated in a chair using a computer assigned to them at their workplace for at least 5 hours per day and 5 days or more per week.
Key exclusion criteria
1) Individuals who regularly receive treatment at medical institutions, osteopathic clinics, or through massage therapy for low back pain or shoulder stiffness.
2) Individuals who have never experienced low back pain, shoulder stiffness, or headaches.
3) Individuals engaged in tasks other than desk work that impose significant load on the lower back.
Target sample size
20
Research contact person
Name of lead principal investigator
| 1st name | Ryoichi |
| Middle name | |
| Last name | Nagatomi |
Organization
Tohoku University
Division name
Promotion Office of Strategic Innovation
Zip code
9800845
Address
Aramaki Aza Aoba 468-1 , Aoba-ku, Sendai 980-0845 Japan
TEL
0227522191
ryoichi.nagatomi.c4@tohoku.ac.jp
Public contact
Name of contact person
| 1st name | Ryoichi |
| Middle name | |
| Last name | Nagatomi |
Organization
Tohoku University
Division name
Promotion Office of Strategic Innovation
Zip code
9800845
Address
Aramaki Aza Aoba 468-1 , Aoba-ku, Sendai 980-0845 Japan
TEL
0227522191
Homepage URL
ryoichi.nagatomi.c4@tohoku.ac.jp
Sponsor or person
Institute
Tohoku University
Institute
Department
Personal name
Funding Source
Organization
CHUO MALLEABLE IRON CO.,LTD.
Organization
Division
Category of Funding Organization
Profit organization
Nationality of Funding Organization
Other related organizations
Co-sponsor
Name of secondary funder(s)
IRB Contact (For public release)
Organization
Ethics Committee Tohoku University Graduate School of Medicine
Address
Seiryo 2-1, Aoba-ku, Sendai, Japan
Tel
022-717-8007
med-kenkyo@grp.tohoku.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 | 03 | Month | 09 | 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 | 02 | Month | 05 | Day |
Date of IRB
Anticipated trial start date
| 2026 | Year | 03 | Month | 16 | Day |
Last follow-up date
| 2026 | Year | 05 | 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 | 03 | Month | 05 | Day |
Last modified on
| 2026 | Year | 03 | Month | 05 | Day |
Link to view the page
Value
https://center6.umin.ac.jp/cgi-open-bin/ctr_e/ctr_view.cgi?recptno=R000069589
