Functional Muscle-Bone Incongruity Index (FKUI): A Prospective Observational Study (FKUI)

June 24, 2026 updated by: Dilek ün oguzhanasilturk, Kanuni Sultan Suleyman Training and Research Hospital

Functional Muscle-Bone Incongruity Index (FKUI): Combined Evaluation of Handgrip Strength, Total Hip Bone Mineral Density, and Lumbar-Hip Bone Mineral Density Discordance in Adults Undergoing DXA

The Functional Muscle-Bone Incongruity Index (FKUI) is a novel approach developed to evaluate the relationship between muscle function and bone health. This prospective observational study aims to investigate the clinical applicability of FKUI, which combines handgrip strength, total hip bone mineral density (BMD), and lumbar-hip BMD discordance. Approximately 200 adult participants undergoing routine DXA assessment will be enrolled. The study will examine whether the combined evaluation of muscle function and bone health parameters provides a more comprehensive assessment of musculoskeletal status than individual measures alone.

Study Overview

Status

Recruiting

Conditions

Detailed Description

This is a prospective, observational, single-center study evaluating adults undergoing routine DXA assessment in a Physical Medicine and Rehabilitation outpatient clinic. The study will investigate the clinical applicability of the Functional Muscle-Bone Incongruity Index (FKUI), a composite approach based on handgrip strength, total hip bone mineral density, and lumbar-hip bone mineral density discordance. No treatment or interventional procedure will be administered as part of the study. Handgrip strength will be measured using a calibrated hand dynamometer, and DXA-derived bone mineral density values will be recorded from routine clinical assessments. The study aims to determine whether the combined evaluation of muscle function and bone health parameters may provide a more comprehensive assessment of musculoskeletal status.

Study Type

Observational

Enrollment (Estimated)

200

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Locations

  • Turkey (Türkiye)
    • Istanbul
      • Küçükçekmece, Istanbul, Turkey (Türkiye), 34303
        • Recruiting
        • Kanuni Sultan Suleyman Training and Research Hospital, Istanbul, Turkey
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

The study population will consist of adults aged 18 years and older attending the Physical Medicine and Rehabilitation outpatient clinic who are scheduled to undergo routine dual-energy X-ray absorptiometry (DXA) assessment as part of their clinical evaluation. Participants will be recruited consecutively from routine clinical practice. The study aims to evaluate the relationship between muscle function and bone health through the Functional Muscle-Bone Incongruity Index (FKUI), which incorporates handgrip strength, total hip bone mineral density, and lumbar-hip bone mineral density discordance.

Description

Inclusion Criteria:

  • Age 18 years or older
  • Attendance at the Physical Medicine and Rehabilitation outpatient clinic
  • Scheduled to undergo routine bone mineral density assessment by DXA as part of clinical evaluation
  • Ability to perform handgrip strength testing
  • Availability of lumbar spine and total hip bone mineral density measurements suitable for analysis
  • Ability and willingness to provide written informed consent

Exclusion Criteria:

Exclusion Criteria:

  • Age younger than 18 years
  • Secondary causes of osteoporosis (e.g., hyperparathyroidism, Cushing syndrome, malignancy, or other conditions affecting bone metabolism)
  • History of metabolic bone disease
  • Major trauma or fracture within the previous 6 months
  • Upper extremity disorders that may significantly affect handgrip strength measurement (e.g., severe osteoarthritis, neurological disorders, major deformities)
  • DXA measurements that are technically inadequate or unsuitable for analysis
  • Refusal or inability to provide written informed consent

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Adults Undergoing Bone Mineral Density Evaluation
Adult patients attending the Physical Medicine and Rehabilitation outpatient clinic and undergoing routine DXA assessment as part of clinical evaluation. Participants will undergo handgrip strength measurement and assessment of bone mineral density parameters. The Functional Muscle-Bone Incongruity Index (FKUI) will be evaluated using handgrip strength, total hip bone mineral density, and lumbar-hip bone mineral density discordance. No treatment or interventional procedure will be administered.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Functional Muscle-Bone Incongruity Index (FKUI)
Time Frame: Baseline (at study enrollment)
Assessment of the clinical applicability of the Functional Muscle-Bone Incongruity Index (FKUI), a composite index based on handgrip strength, total hip bone mineral density, and lumbar-hip bone mineral density discordance.
Baseline (at study enrollment)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Kanuni Sultan Suleyman Training and Research Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

May 1, 2026

Primary Completion (Estimated)

May 1, 2027

Study Completion (Estimated)

May 1, 2027

Study Registration Dates

First Submitted

June 24, 2026

First Submitted That Met QC Criteria

June 24, 2026

First Posted (Actual)

June 30, 2026

Study Record Updates

Last Update Posted (Actual)

June 30, 2026

Last Update Submitted That Met QC Criteria

June 24, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • FKUI
  • KSS-TRH-FKUI-2026 (Other Identifier: Kanuni Sultan Suleyman Training and Research Hospital Kanuni Sultan Süleyman Eğitim ve Araştırma Hastanesi)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

No plan has been established to share individual participant data. Participant confidentiality will be maintained in accordance with ethical and institutional requirements.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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