Carpal Tunnel Syndrome (CTS)NCT07706296
Reliability and Validity of Hand Function Tests in Carpal Tunnel Syndrome
An observational study of Carpal Tunnel Syndrome (CTS), run by Izmir Bakircay University at 1 site in Turkey (Türkiye).
Trial summary
Carpal tunnel syndrome is a condition that causes numbness, tingling, and weakness in the hand due to pressure on the median nerve in the wrist. This condition often negatively affects a person's hand functions and ability to perform daily activities. Read more about this study
- Who is it for?
- Ages 18 to 60 years
- Conditions the study is for
- Carpal Tunnel Syndrome (CTS)
- What is being tested?
- Standardized Hand Function and Dexterity Testing
- How many people
- 100 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 16 Jul 2026to 1 Sep 2027
- How long will I take part?
- 14 Days
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 60 years
- All sexes
- No healthy volunteers
- Adult
Study population: The study population will consist of adult patients diagnosed with carpal tunnel syndrome who apply for medical care or undergo clinical evaluation. Participants will be recruited directly from the outpatient clinics of the Department of Orthopedics and Traumatology at a tertiary care university hospital.
Who may be able to join
- Diagnosed with unilateral carpal tunnel syndrome by an orthopedist based on electromyography (EMG) evaluation and clinical examination
- Being literate (ability to read and write)
- Having a Mini-Mental State Examination (MMSE) score of 24 or above, administered for the assessment of cognitive competence
Who cannot join
- Individuals who have previously undergone any surgical intervention on the upper extremity
- Individuals with symptomatic pathologies in the cervical region (e.g., cervical disc herniation)
- Having a history of neurological disease
- Individuals diagnosed with rheumatic diseases affecting the upper extremity (e.g., rheumatoid arthritis, systemic lupus erythematosus, etc.)
- Individuals with current pain complaints in the upper extremity due to any reason (other than carpal tunnel syndrome)
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Turkey (Türkiye)1 site, 1 recruiting
- Recruiting
İzmir Bakırçay University
Izmir
Sena Yılmaz, +902324930000, 190705070@bakircay.edu.tr
About this study
Official title: Reliability and Construct Validity of the Jebsen-Taylor Hand Function Test, Minnesota Dexterity Test, and Nine-Hole Peg Test in Patients With Carpal Tunnel Syndrome
Carpal tunnel syndrome is a condition that causes numbness, tingling, and weakness in the hand due to pressure on the median nerve in the wrist. This condition often negatively affects a person's hand functions and ability to perform daily activities. While various tests are used in clinics to measure hand function, dexterity, and fine motor skills, there is still a lack of clear consensus in the literature regarding the specific reliability and validity of these particular tests for this patient population. Consequently, it remains uncertain which of these tests are truly accurate, consistent, and most appropriate for routine clinical use in carpal tunnel syndrome. Therefore, it is crucial to scientifically evaluate these tests to fill this gap in the literature.
The purpose of this study is to investigate reliability and construct validity of the Jebsen-Taylor Hand Function Test (JTHFT), the Minnesota Dexterity Test (MDT), and the Nine-Hole Peg Test (NHPG) in patients with carpal tunnel syndrome (CTS).
Read more
To achieve these objectives, a rigorous methodological protocol will be implemented (COSMIN criteria). Test-retest reliability will be evaluated by repeating the assessments within a 7-to-14-day interval. To control for potential learning, fatigue, and adaptation effects, the order of all performance tests will be strictly randomized using a permutation approach during both the initial (baseline) and the second (retest) evaluation sessions. Additionally, measurement error will be calculated using Standard Error of Measurement and Minimal Detectable Change to determine the true clinical precision of these tools.
For construct validity, a specific testing sequence and strict randomization strategy will be utilized to minimize response bias. Participants will complete all patient-reported outcome questionnaires prior to undergoing any physical testing. This ensures that a patient's subjective evaluation of their daily life activities is not influenced by their immediate performance or perceived success on the physical tests. Following the questionnaires, hand strength measurements and dexterity performance tests will be administered. The sequence of these physical tests will be fully randomized both among different test modalities and within their internal subtests for each participant. Construct validity will be evaluated through predefined hypothesis testing based on COSMIN guidelines. Convergent validity will be confirmed if a moderate correlation (r≥0.40 or r≤-0.40) is observed between the dexterity tests and structurally related parameters. Divergent validity will be confirmed by a weak correlation (r≥-0.39 and r≤0.39) with structurally unrelated or distinct clinical parameters. Construct validity of the assessments will be considered satisfactory if at least 75% of these predefined hypotheses are confirmed by the statistical analysis.
Read the detailed description
Predefined hypothesis (the details of the used questionnaires and measurements are in Outcome Measures):
JTHFT-total score:
- Boston Carpal Tunnel Questionnaire (BCTQ)-Functional Status Scale: Moderate correlation
- Michigan Hand Outcomes Questionnaire (MHQ)-Overall hand function: Moderate correlation
- MHQ-Activities of daily living: Moderate correlation
- MHQ-Work performance: Moderate correlation
- QuickDASH (QDASH)-disability/symptom: Moderate correlation
- Hand Grip Strength: Moderate correlation
- Pinch Strength: Moderate correlation
- EuroQol 5D-5L (EQ-5D-5L): Weak correlation
- MHQ-Aesthetics: Weak correlation
- BCTQ-Functional Status Scale vs. EQ-5D-5L: Correlation with BCTQ-Functional Status Scale is at least 0.1 higher than with EQ-5D-5L
- MHQ-Overall hand function vs. EQ-5D-5L: Correlation with MHQ-Overall hand function is at least 0.1 higher than with EQ-5D-5L
- MHQ-Activities of daily living vs. EQ-5D-5L: Correlation with MHQ-Activities of daily living is at least 0.1 higher than with EQ-5D-5L
- MHQ-Work performance vs. EQ-5D-5L: Correlation with MHQ-Work performance is at least 0.1 higher than with EQ-5D-5L
- QDASH-disability/symptom vs. EQ-5D-5L: Correlation with QDASH-disability/symptom is at least 0.1 higher than with EQ-5D-5L
- BCTQ-Functional Status Scale vs. BCTQ-Symptom Severity Scale (BCTQ-Symptom): Correlation between BCTQ-Functional Status Scale and BCTQ-Symptom is at least 0.1 higher than between JTHFT-Total and BCTQ-Symptom
- MHQ-Overall hand function vs. MHQ-Pain: Correlation between MHQ-Overall hand function and MHQ-Pain is at least 0.1 higher than between JTHFT-Total and MHQ-Pain
- MHQ-Overall hand function vs. MHQ-Satisfaction: Correlation between MHQ-Overall hand function and MHQ-Satisfaction is at least 0.1 higher than between JTHFT-Total and MHQ-Satisfaction
- MHQ-Activities of daily living vs. MHQ-Pain: Correlation between MHQ-Activities of daily living and MHQ-Pain is at least 0.1 higher than between JTHFT-Total and MHQ-Pain
- MHQ-Activities of daily living vs. MHQ-Satisfaction: Correlation between MHQ-Activities of daily living and MHQ-Satisfaction is at least 0.1 higher than between JTHFT-Total and MHQ-Satisfaction
- MHQ-Work performance vs. MHQ-Pain: Correlation between MHQ-Work performance and MHQ-Pain is at least 0.1 higher than between JTHFT-Total and MHQ-Pain
- MHQ-Work performance vs. MHQ-Satisfaction: Correlation between MHQ-Work performance and MHQ-Satisfaction is at least 0.1 higher than between JTHFT-Total and MHQ-Satisfaction
JTHFT Subtests:
- JTHFT-Writing \& BCTQ-Functional Status Scale Item 1: Moderate correlation
- JTHFT-Writing vs. Overall Scales: Correlation with BCTQ-Functional Status Scale Item 1 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
- JTHFT-Card Turning vs. Overall Scales: Correlation with MHQ-Activities of daily living Item 4 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
- JTHFT-Small Objects vs. Overall Scales: Correlation with BCTQ-Symptom Severity Scale Item 11 and MHQ-Activities of daily living Item 2 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
- JTHFT-Simulated Feeding vs. Overall Scales: Correlation with MHQ-Activities of daily living Item C-3 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
- JTHFT-Stacking Checkers vs. Overall Scales: Correlation with BCTQ-Symptom Item 11 and MHQ-Activities of daily living Item 2 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
- JTHFT-Light Cans vs. Overall Scales: Correlation with BCTQ-Functional Status Scale Item 4 and MHQ-Activities of daily living Item 3 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
- JTHFT-Heavy Cans vs. Overall Scales: Correlation with BCTQ-Functional Status Scale Item 4 and MHQ-Activities of daily living Item 3 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
Minnesota Dexterity Test (MDT) - Placing \& Turning Scores:
- BCTQ-Functional Status Scale: Moderate correlation
- MHQ-Overall hand function: Moderate correlation
- MHQ-Activities of daily living: Moderate correlation
- MHQ-Work performance: Moderate correlation
- QDASH-disability/symptom: Moderate correlation
- Hand Grip Strength: Moderate correlation
- Pinch Strength: Moderate correlation
- EQ-5D-5L: Weak correlation
- MHQ-Aesthetics: Weak correlation
- BCTQ-Functional Status Scale vs. EQ-5D-5L: Correlation with BCTQ-Functional Status Scale is at least 0.1 higher than with EQ-5D-5L
- MHQ-Overall hand function vs. EQ-5D-5L: Correlation with MHQ-Overall hand function is at least 0.1 higher than with EQ-5D-5L
- MHQ-Activities of daily living vs. EQ-5D-5L: Correlation with MHQ-Activities of daily living is at least 0.1 higher than with EQ-5D-5L
- MHQ-Work performance vs. EQ-5D-5L: Correlation with MHQ-Work performance is at least 0.1 higher than with EQ-5D-5L
- QDASH-disability/symptom vs. EQ-5D-5L: Correlation with QDASH-disability/symptom is at least 0.1 higher than with EQ-5D-5L
- BCTQ-Functional Status Scale vs. BCTQ-Symptom: Correlation between BCTQ-Functional Status Scale and BCTQ-Symptom is at least 0.1 higher than between MDT (Placing/Turning) and BCTQ-Symptom
- MHQ-Overall hand function vs. MHQ-Pain: Correlation between MHQ-Overall hand function and MHQ-Pain is at least 0.1 higher than between MDT (Placing/Turning) and MHQ-Pain
- MHQ-Overall hand function vs. MHQ-Satisfaction: Correlation between MHQ-Overall hand function and MHQ-Satisfaction is at least 0.1 higher than between MDT (Placing/Turning) and MHQ-Satisfaction
- MHQ-Activities of daily living vs. MHQ-Pain: Correlation between MHQ-Activities of daily living and MHQ-Pain is at least 0.1 higher than between MDT (Placing/Turning) and MHQ-Pain
- MHQ-Activities of daily living vs. MHQ-Satisfaction: Correlation between MHQ-Activities of daily living and MHQ-Satisfaction is at least 0.1 higher than between MDT (Placing/Turning) and MHQ-Satisfaction
- MHQ-Work performance vs. MHQ-Pain: Correlation between MHQ-Work performance and MHQ-Pain is at least 0.1 higher than between MDT (Placing/Turning) and MHQ-Pain
- MHQ-Work performance vs. MHQ-Satisfaction: Correlation between MHQ-Work performance and MHQ-Satisfaction is at least 0.1 higher than between MDT (Placing/Turning) and MHQ-Satisfaction
- MDT-Placing vs. Overall Scales: Correlation with BCTQ-Symptom Item 11 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L.
- MDT-Placing vs. Overall Scales: Correlation with MHQ-Activities of daily living Item 2 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L.
- MDT-Turning vs. Overall Scales: Correlation with BCTQ-Symptom Item 11 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L.
- MDT-Turning vs. Overall Scales: Correlation with MHQ-Activities of daily living Item 2 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L.
Nine-Hole Peg Test (NHPT):
- BCTQ-Functional Status Scale: Moderate correlation
- MHQ-Overall hand function: Moderate correlation
- MHQ-Activities of daily living: Moderate correlation
- MHQ-Work performance: Moderate correlation
- QDASH-disability/symptom: Moderate correlation
- Hand Grip Strength: Moderate correlation
- Pinch Strength: Moderate correlation
- EQ-5D-5L: Weak correlation
- MHQ-Aesthetics: Weak correlation
- BCTQ-Functional Status Scale vs. EQ-5D-5L: Correlation with BCTQ-Functional Status Scale is at least 0.1 higher than with EQ-5D-5L
- MHQ-Overall hand function vs. EQ-5D-5L: Correlation with MHQ-Overall hand function is at least 0.1 higher than with EQ-5D-5L
- MHQ-Activities of daily living vs. EQ-5D-5L: Correlation with MHQ-Activities of daily living is at least 0.1 higher than with EQ-5D-5L
- MHQ-Work performance vs. EQ-5D-5L: Correlation with MHQ-Work performance is at least 0.1 higher than with EQ-5D-5L
- QDASH-disability/symptom vs. EQ-5D-5L: Correlation with QDASH-disability/symptom is at least 0.1 higher than with EQ-5D-5L
- BCTQ-Functional Status Scale vs. BCTQ-Symptom: Correlation between BCTQ-Functional Status Scale and BCTQ-Symptom is at least 0.1 higher than between NHPT and BCTQ-Symptom
- MHQ-Overall hand function vs. MHQ-Pain: Correlation between MHQ-Overall hand function and MHQ-Pain is at least 0.1 higher than between NHPT and MHQ-Pain
- MHQ-Overall hand function vs. MHQ-Satisfaction: Correlation between MHQ-Overall hand function and MHQ-Satisfaction is at least 0.1 higher than between NHPT and MHQ-Satisfaction
- MHQ-Activities of daily living vs. MHQ-Pain: Correlation between MHQ-Activities of daily living and MHQ-Pain is at least 0.1 higher than between NHPT and MHQ-Pain
- MHQ-Activities of daily living vs. MHQ-Satisfaction: Correlation between MHQ-Activities of daily living and MHQ-Satisfaction is at least 0.1 higher than between NHPT and MHQ-Satisfaction
- MHQ-Work performance vs. MHQ-Pain: Correlation between MHQ-Work performance and MHQ-Pain is at least 0.1 higher than between NHPT and MHQ-Pain
- MHQ-Work performance vs. MHQ-Satisfaction: Correlation between MHQ-Work performance and MHQ-Satisfaction is at least 0.1 higher than between NHPT and MHQ-Satisfaction
- NHPT vs. Overall Scales: Correlation with BCTQ-Symptom Item 11 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L.
- Conditions
- Carpal Tunnel Syndrome (CTS)
- Being tested
- Standardized Hand Function and Dexterity Testing
- Medical subject headings
- Carpal Tunnel Syndrome
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Standardized Hand Function and Dexterity TestingOther
Participants will not receive any therapeutic, surgical, or pharmacological intervention as part of this observational study. The 'exposure or process of interest' consists solely of undergoing three standardized functional assessments (Jebsen-Taylor Hand Function Test, Minnesota Dexterity Test, and Nine-Hole Peg Test) to evaluate their psychometric properties (reliability and validity) in patients with carpal tunnel syndrome. All testing details are defined in the Outcome Measures section.
What is being measured
The primary outcome is the main question the study is designed to answer.
Jebsen-Taylor Hand Function Test
A standardized, timed assessment designed to evaluate a broad range of uni-manual hand functions utilizing everyday functional activities. It consists of seven distinct subtests: writing, card turning, picking up small objects, simulated feeding, stacking checkers, picking up large light cans, picking up large heavy cans.
The physiotherapist will demonstrate the test first, followed by a practice trial for the participant. A maximum time limit of 120 seconds is set for each subtest; if a task cannot be completed, the score is recorded as 120 seconds.
Measured: For test-retest reliability: baseline (first measurement) and retest (second measurement, 7 to 14 days after baseline)
Minnesota Dexterity Test
The Minnesota Dexterity Test is a standardized objective instrument used to evaluate rapid eye-hand coordination and gross arm-hand dexterity. It consists of two primary subtests: the Placing Test and the Turning Test. In the Placing Test, the subject fills the board with 60 cylindrical blocks as quickly as possible. In the Turning Test, the subject turns the blocks over in a specified sequence using both hands alternately. Each subtest will be performed two times. Separate total scores will be calculated for the Placing Test and the Turning Test based on the total time (in seconds) required to complete the trials. Higher scores (longer times) indicate greater impairment and poorer manual dexterity.
Measured: For test-retest reliability: baseline (first measurement) and retest (second measurement, 7 to 14 days after baseline)
Nine-Hole Peg Test
The Nine-Hole Peg Test is a brief, standardized quantitative assessment used to measure finger dexterity and fine manual velocity. The apparatus consists of a plastic board with nine holes and nine pegs. The participant will be instructed to pick up the pegs one by one from a container, place them into the nine holes as fast as possible, and then remove them one by one, returning them to the container. The test will be performed one time. The score will be recorded as the total time (in seconds) taken to complete the entire task. Higher scores (longer times) indicate worse fine motor dexterity and coordination.
Measured: For test-retest reliability: baseline (first measurement) and retest (second measurement, 7 to 14 days after baseline)
Secondary outcomes (6)
Boston Carpal Tunnel Questionnaire
The Boston Carpal Tunnel Questionnaire is a patient-reported, disease-specific outcome measure designed to evaluate the severity of symptoms and functional status in patients with carpal tunnel syndrome. It comprises two independent subscales: the Symptom Severity Scale (11 items) and the Functional Status Scale (8 items). Each item is scored on a 5-point Likert scale ranging from 1 (no symptoms/no difficulty) to 5 (most severe symptoms/cannot perform activity). The score for each subscale is calculated as the mean of the completed items, yielding a final score between 1 and 5. Higher scores represent more severe symptoms and worse functional limitation.
Measured: For validity: baseline
Michigan Hand Outcomes Questionnaire
The Michigan Hand Outcomes Questionnaire is a comprehensive, hand-specific psychometric instrument designed to assess a patient's perception of their hand function and quality of life. It contains 57 items divided into six distinct domains: Overall Hand Function, Activities of Daily Living, Work Performance, Pain, Aesthetics, and Patient Satisfaction. Items are scored on a 5-point scale, and responses are normalized and converted to a standardized score ranging from 0 to 100 for each domain. For the pain domain, a higher score denotes greater pain severity. For the remaining five domains, higher scores represent better hand performance, appearance, and satisfaction.
Measured: For validity: baseline
QuickDASH
The QuickDASH is a shortened, 11-item version of the Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire, used to measure physical symptoms and disability in individuals with musculoskeletal disorders of the upper limb. It evaluates symptoms (such as pain and tingling) and the ability to perform specific physical activities during the past week. Each item is rated on a 5-point Likert scale. The scores are summated and transformed to a standardized scale of 0 to 100, where 0 represents no disability and 100 represents the most severe disability and symptom expression.
Measured: For validity: baseline
EuroQol 5D-5L
The EuroQol 5D-5L is a standardized, generic instrument used to measure health-related quality of life. It consists of two main components: the EQ-5D descriptive system and the EQ Visual Analogue Scale (EQ VAS). The descriptive system covers five dimensions: Mobility, Self-Care, Usual Activities, Pain/Discomfort, and Anxiety/Depression. Each dimension is rated on 5 levels of severity ranging from 1 (no problems) to 5 (extreme problems). The EQ VAS records the respondent's self-rated health on a vertical visual analogue scale ranging from 0 (the worst health you can imagine) to 100 (the best health you can imagine)
Measured: For validity: baseline
Hand Grip Strength
Hand grip strength will be measured objectively using a calibrated hydraulic hand dynamometer to assess gross hand grip capacity. The testing will be performed with the subject seated comfortably, the shoulder adducted and neutrally rotated, the elbow flexed at 90 degrees, and the forearm and wrist in a neutral position. The assessment will be conducted for the affected hand, with three trials performed for the hand, and a brief rest period allowed between trials. The average score of the three trials is recorded in kilograms. Higher values indicate greater hand grip strength.
Measured: For validity: baseline
Pinch Strength
The pinch strength will be measured using a calibrated hydraulic pinch gauge. The testing will be performed with the subject seated comfortably, the shoulder adducted and neutrally rotated, the elbow flexed at 90 degrees, and the forearm and wrist in a neutral position. The assessment will be conducted for the affected hand, with three trials performed for the hand, and a brief rest period allowed between trials. The scores will be recorded in kilograms. Higher values represent stronger pinch capacity.
Measured: For validity: baseline
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted15 Jul 2026
- Study start16 Jul 2026
- Primary completion1 Aug 2027 (estimated)
- Study completion1 Sep 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Carpal Tunnel Syndrome (CTS)Studies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Case only
- Time perspective
- Prospective
- Enrolment
- 100 participants (estimated)
- Target duration
- 14 Days
Sponsor and investigators
- Lead sponsor
- Izmir Bakircay University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Gülbin Ergin, Izmir Bakircay University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07706296
- Sponsor's protocol ID
- 2776
- Status last verified
- Jul 2026
- First submitted
- 11 Jul 2026
- Last updated
- 17 Jul 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 17 Jul 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Reliability and Construct Validity of the Jebsen-Taylor Hand Function Test, Minnesota Dexterity Test, and Nine-Hole Peg Test in Patients With Carpal Tunnel Syndrome
- ClinicalTrials.gov ID
- NCT07706296
- Acronym / sponsor ID
- 2776
- Conditions
- Carpal Tunnel Syndrome (CTS)
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 100 participants (estimated)
- Lead sponsor
- Izmir Bakircay UniversityUniversity, hospital or other
- Study start
- 16 Jul 2026 (actual)
- Primary completion
- 1 Aug 2027 (estimated)
- Study completion
- 1 Sep 2027 (estimated)
- First posted
- 15 Jul 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Carpal tunnel syndrome is a condition that causes numbness, tingling, and weakness in the hand due to pressure on the median nerve in the wrist. This condition often negatively affects a person's hand functions and ability to perform daily activities. While various tests are used in clinics to measure hand function, dexterity, and fine motor skills, there is still a lack of clear consensus in the literature regarding the specific reliability and validity of these particular tests for this patient population. Consequently, it remains uncertain which of these tests are truly accurate, consistent, and most appropriate for routine clinical use in carpal tunnel syndrome. Therefore, it is crucial to scientifically evaluate these tests to fill this gap in the literature.
The purpose of this study is to investigate reliability and construct validity of the Jebsen-Taylor Hand Function Test (JTHFT), the Minnesota Dexterity Test (MDT), and the Nine-Hole Peg Test (NHPG) in patients with carpal tunnel syndrome (CTS).
To achieve these objectives, a rigorous methodological protocol will be implemented (COSMIN criteria). Test-retest reliability will be evaluated by repeating the assessments within a 7-to-14-day interval. To control for potential learning, fatigue, and adaptation effects, the order of all performance tests will be strictly randomized using a permutation approach during both the initial (baseline) and the second (retest) evaluation sessions. Additionally, measurement error will be calculated using Standard Error of Measurement and Minimal Detectable Change to determine the true clinical precision of these tools.
For construct validity, a specific testing sequence and strict randomization strategy will be utilized to minimize response bias. Participants will complete all patient-reported outcome questionnaires prior to undergoing any physical testing. This ensures that a patient's subjective evaluation of their daily life activities is not influenced by their immediate performance or perceived success on the physical tests. Following the questionnaires, hand strength measurements and dexterity performance tests will be administered. The sequence of these physical tests will be fully randomized both among different test modalities and within their internal subtests for each participant. Construct validity will be evaluated through predefined hypothesis testing based on COSMIN guidelines. Convergent validity will be confirmed if a moderate correlation (r≥0.40 or r≤-0.40) is observed between the dexterity tests and structurally related parameters. Divergent validity will be confirmed by a weak correlation (r≥-0.39 and r≤0.39) with structurally unrelated or distinct clinical parameters. Construct validity of the assessments will be considered satisfactory if at least 75% of these predefined hypotheses are confirmed by the statistical analysis.
Detailed description
Predefined hypothesis (the details of the used questionnaires and measurements are in Outcome Measures):
JTHFT-total score:
- Boston Carpal Tunnel Questionnaire (BCTQ)-Functional Status Scale: Moderate correlation
- Michigan Hand Outcomes Questionnaire (MHQ)-Overall hand function: Moderate correlation
- MHQ-Activities of daily living: Moderate correlation
- MHQ-Work performance: Moderate correlation
- QuickDASH (QDASH)-disability/symptom: Moderate correlation
- Hand Grip Strength: Moderate correlation
- Pinch Strength: Moderate correlation
- EuroQol 5D-5L (EQ-5D-5L): Weak correlation
- MHQ-Aesthetics: Weak correlation
- BCTQ-Functional Status Scale vs. EQ-5D-5L: Correlation with BCTQ-Functional Status Scale is at least 0.1 higher than with EQ-5D-5L
- MHQ-Overall hand function vs. EQ-5D-5L: Correlation with MHQ-Overall hand function is at least 0.1 higher than with EQ-5D-5L
- MHQ-Activities of daily living vs. EQ-5D-5L: Correlation with MHQ-Activities of daily living is at least 0.1 higher than with EQ-5D-5L
- MHQ-Work performance vs. EQ-5D-5L: Correlation with MHQ-Work performance is at least 0.1 higher than with EQ-5D-5L
- QDASH-disability/symptom vs. EQ-5D-5L: Correlation with QDASH-disability/symptom is at least 0.1 higher than with EQ-5D-5L
- BCTQ-Functional Status Scale vs. BCTQ-Symptom Severity Scale (BCTQ-Symptom): Correlation between BCTQ-Functional Status Scale and BCTQ-Symptom is at least 0.1 higher than between JTHFT-Total and BCTQ-Symptom
- MHQ-Overall hand function vs. MHQ-Pain: Correlation between MHQ-Overall hand function and MHQ-Pain is at least 0.1 higher than between JTHFT-Total and MHQ-Pain
- MHQ-Overall hand function vs. MHQ-Satisfaction: Correlation between MHQ-Overall hand function and MHQ-Satisfaction is at least 0.1 higher than between JTHFT-Total and MHQ-Satisfaction
- MHQ-Activities of daily living vs. MHQ-Pain: Correlation between MHQ-Activities of daily living and MHQ-Pain is at least 0.1 higher than between JTHFT-Total and MHQ-Pain
- MHQ-Activities of daily living vs. MHQ-Satisfaction: Correlation between MHQ-Activities of daily living and MHQ-Satisfaction is at least 0.1 higher than between JTHFT-Total and MHQ-Satisfaction
- MHQ-Work performance vs. MHQ-Pain: Correlation between MHQ-Work performance and MHQ-Pain is at least 0.1 higher than between JTHFT-Total and MHQ-Pain
- MHQ-Work performance vs. MHQ-Satisfaction: Correlation between MHQ-Work performance and MHQ-Satisfaction is at least 0.1 higher than between JTHFT-Total and MHQ-Satisfaction
JTHFT Subtests:
- JTHFT-Writing \& BCTQ-Functional Status Scale Item 1: Moderate correlation
- JTHFT-Writing vs. Overall Scales: Correlation with BCTQ-Functional Status Scale Item 1 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
- JTHFT-Card Turning vs. Overall Scales: Correlation with MHQ-Activities of daily living Item 4 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
- JTHFT-Small Objects vs. Overall Scales: Correlation with BCTQ-Symptom Severity Scale Item 11 and MHQ-Activities of daily living Item 2 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
- JTHFT-Simulated Feeding vs. Overall Scales: Correlation with MHQ-Activities of daily living Item C-3 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
- JTHFT-Stacking Checkers vs. Overall Scales: Correlation with BCTQ-Symptom Item 11 and MHQ-Activities of daily living Item 2 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
- JTHFT-Light Cans vs. Overall Scales: Correlation with BCTQ-Functional Status Scale Item 4 and MHQ-Activities of daily living Item 3 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
- JTHFT-Heavy Cans vs. Overall Scales: Correlation with BCTQ-Functional Status Scale Item 4 and MHQ-Activities of daily living Item 3 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L
Minnesota Dexterity Test (MDT) - Placing \& Turning Scores:
- BCTQ-Functional Status Scale: Moderate correlation
- MHQ-Overall hand function: Moderate correlation
- MHQ-Activities of daily living: Moderate correlation
- MHQ-Work performance: Moderate correlation
- QDASH-disability/symptom: Moderate correlation
- Hand Grip Strength: Moderate correlation
- Pinch Strength: Moderate correlation
- EQ-5D-5L: Weak correlation
- MHQ-Aesthetics: Weak correlation
- BCTQ-Functional Status Scale vs. EQ-5D-5L: Correlation with BCTQ-Functional Status Scale is at least 0.1 higher than with EQ-5D-5L
- MHQ-Overall hand function vs. EQ-5D-5L: Correlation with MHQ-Overall hand function is at least 0.1 higher than with EQ-5D-5L
- MHQ-Activities of daily living vs. EQ-5D-5L: Correlation with MHQ-Activities of daily living is at least 0.1 higher than with EQ-5D-5L
- MHQ-Work performance vs. EQ-5D-5L: Correlation with MHQ-Work performance is at least 0.1 higher than with EQ-5D-5L
- QDASH-disability/symptom vs. EQ-5D-5L: Correlation with QDASH-disability/symptom is at least 0.1 higher than with EQ-5D-5L
- BCTQ-Functional Status Scale vs. BCTQ-Symptom: Correlation between BCTQ-Functional Status Scale and BCTQ-Symptom is at least 0.1 higher than between MDT (Placing/Turning) and BCTQ-Symptom
- MHQ-Overall hand function vs. MHQ-Pain: Correlation between MHQ-Overall hand function and MHQ-Pain is at least 0.1 higher than between MDT (Placing/Turning) and MHQ-Pain
- MHQ-Overall hand function vs. MHQ-Satisfaction: Correlation between MHQ-Overall hand function and MHQ-Satisfaction is at least 0.1 higher than between MDT (Placing/Turning) and MHQ-Satisfaction
- MHQ-Activities of daily living vs. MHQ-Pain: Correlation between MHQ-Activities of daily living and MHQ-Pain is at least 0.1 higher than between MDT (Placing/Turning) and MHQ-Pain
- MHQ-Activities of daily living vs. MHQ-Satisfaction: Correlation between MHQ-Activities of daily living and MHQ-Satisfaction is at least 0.1 higher than between MDT (Placing/Turning) and MHQ-Satisfaction
- MHQ-Work performance vs. MHQ-Pain: Correlation between MHQ-Work performance and MHQ-Pain is at least 0.1 higher than between MDT (Placing/Turning) and MHQ-Pain
- MHQ-Work performance vs. MHQ-Satisfaction: Correlation between MHQ-Work performance and MHQ-Satisfaction is at least 0.1 higher than between MDT (Placing/Turning) and MHQ-Satisfaction
- MDT-Placing vs. Overall Scales: Correlation with BCTQ-Symptom Item 11 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L.
- MDT-Placing vs. Overall Scales: Correlation with MHQ-Activities of daily living Item 2 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L.
- MDT-Turning vs. Overall Scales: Correlation with BCTQ-Symptom Item 11 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L.
- MDT-Turning vs. Overall Scales: Correlation with MHQ-Activities of daily living Item 2 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L.
Nine-Hole Peg Test (NHPT):
- BCTQ-Functional Status Scale: Moderate correlation
- MHQ-Overall hand function: Moderate correlation
- MHQ-Activities of daily living: Moderate correlation
- MHQ-Work performance: Moderate correlation
- QDASH-disability/symptom: Moderate correlation
- Hand Grip Strength: Moderate correlation
- Pinch Strength: Moderate correlation
- EQ-5D-5L: Weak correlation
- MHQ-Aesthetics: Weak correlation
- BCTQ-Functional Status Scale vs. EQ-5D-5L: Correlation with BCTQ-Functional Status Scale is at least 0.1 higher than with EQ-5D-5L
- MHQ-Overall hand function vs. EQ-5D-5L: Correlation with MHQ-Overall hand function is at least 0.1 higher than with EQ-5D-5L
- MHQ-Activities of daily living vs. EQ-5D-5L: Correlation with MHQ-Activities of daily living is at least 0.1 higher than with EQ-5D-5L
- MHQ-Work performance vs. EQ-5D-5L: Correlation with MHQ-Work performance is at least 0.1 higher than with EQ-5D-5L
- QDASH-disability/symptom vs. EQ-5D-5L: Correlation with QDASH-disability/symptom is at least 0.1 higher than with EQ-5D-5L
- BCTQ-Functional Status Scale vs. BCTQ-Symptom: Correlation between BCTQ-Functional Status Scale and BCTQ-Symptom is at least 0.1 higher than between NHPT and BCTQ-Symptom
- MHQ-Overall hand function vs. MHQ-Pain: Correlation between MHQ-Overall hand function and MHQ-Pain is at least 0.1 higher than between NHPT and MHQ-Pain
- MHQ-Overall hand function vs. MHQ-Satisfaction: Correlation between MHQ-Overall hand function and MHQ-Satisfaction is at least 0.1 higher than between NHPT and MHQ-Satisfaction
- MHQ-Activities of daily living vs. MHQ-Pain: Correlation between MHQ-Activities of daily living and MHQ-Pain is at least 0.1 higher than between NHPT and MHQ-Pain
- MHQ-Activities of daily living vs. MHQ-Satisfaction: Correlation between MHQ-Activities of daily living and MHQ-Satisfaction is at least 0.1 higher than between NHPT and MHQ-Satisfaction
- MHQ-Work performance vs. MHQ-Pain: Correlation between MHQ-Work performance and MHQ-Pain is at least 0.1 higher than between NHPT and MHQ-Pain
- MHQ-Work performance vs. MHQ-Satisfaction: Correlation between MHQ-Work performance and MHQ-Satisfaction is at least 0.1 higher than between NHPT and MHQ-Satisfaction
- NHPT vs. Overall Scales: Correlation with BCTQ-Symptom Item 11 is at least 0.1 higher than with BCTQ-Total, MHQ-Overall hand function, MHQ-Activities of daily living, MHQ-Work performance, QDASH-disability/symptom, and EQ-5D-5L.
Study design
- Observational model
- Case only
- Time perspective
- Prospective
- Target follow-up
- 14 Days
Who may qualify
- Ages
- 18 to 60 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult
- Study population
- The study population will consist of adult patients diagnosed with carpal tunnel syndrome who apply for medical care or undergo clinical evaluation. Participants will be recruited directly from the outpatient clinics of the Department of Orthopedics and Traumatology at a tertiary care university hospital.
Key inclusion criteria (3 listed)
- Diagnosed with unilateral carpal tunnel syndrome by an orthopedist based on electromyography (EMG) evaluation and clinical examination
- Being literate (ability to read and write)
- Having a Mini-Mental State Examination (MMSE) score of 24 or above, administered for the assessment of cognitive competence
Key exclusion criteria (5 listed)
- Individuals who have previously undergone any surgical intervention on the upper extremity
- Individuals with symptomatic pathologies in the cervical region (e.g., cervical disc herniation)
- Having a history of neurological disease
- Individuals diagnosed with rheumatic diseases affecting the upper extremity (e.g., rheumatoid arthritis, systemic lupus erythematosus, etc.)
- Individuals with current pain complaints in the upper extremity due to any reason (other than carpal tunnel syndrome)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Standardized Hand Function and Dexterity TestingParticipants will not receive any therapeutic, surgical, or pharmacological intervention as part of this observational study. The 'exposure or process of interest' consists solely of undergoing three standardized functional assessments (Jebsen-Taylor Hand Function Test, Minnesota Dexterity Test, and Nine-Hole Peg Test) to evaluate their psychometric properties (reliability and validity) in patients with carpal tunnel syndrome. All testing details are defined in the Outcome Measures section. | Other | – |
Primary outcome
Jebsen-Taylor Hand Function Test
Time frame: For test-retest reliability: baseline (first measurement) and retest (second measurement, 7 to 14 days after baseline)
A standardized, timed assessment designed to evaluate a broad range of uni-manual hand functions utilizing everyday functional activities. It consists of seven distinct subtests: writing, card turning, picking up small objects, simulated feeding, stacking checkers, picking up large light cans, picking up large heavy cans. The physiotherapist will demonstrate the test first, followed by a practice trial for the participant. A maximum time limit of 120 seconds is set for each subtest; if a task cannot be completed, the score is recorded as 120 seconds.
Minnesota Dexterity Test
Time frame: For test-retest reliability: baseline (first measurement) and retest (second measurement, 7 to 14 days after baseline)
The Minnesota Dexterity Test is a standardized objective instrument used to evaluate rapid eye-hand coordination and gross arm-hand dexterity. It consists of two primary subtests: the Placing Test and the Turning Test. In the Placing Test, the subject fills the board with 60 cylindrical blocks as quickly as possible. In the Turning Test, the subject turns the blocks over in a specified sequence using both hands alternately. Each subtest will be performed two times. Separate total scores will be calculated for the Placing Test and the Turning Test based on the total time (in seconds) required to complete the trials. Higher scores (longer times) indicate greater impairment and poorer manual dexterity.
Nine-Hole Peg Test
Time frame: For test-retest reliability: baseline (first measurement) and retest (second measurement, 7 to 14 days after baseline)
The Nine-Hole Peg Test is a brief, standardized quantitative assessment used to measure finger dexterity and fine manual velocity. The apparatus consists of a plastic board with nine holes and nine pegs. The participant will be instructed to pick up the pegs one by one from a container, place them into the nine holes as fast as possible, and then remove them one by one, returning them to the container. The test will be performed one time. The score will be recorded as the total time (in seconds) taken to complete the entire task. Higher scores (longer times) indicate worse fine motor dexterity and coordination.
6 secondary outcomes
Boston Carpal Tunnel Questionnaire
Time frame: For validity: baseline
Michigan Hand Outcomes Questionnaire
Time frame: For validity: baseline
QuickDASH
Time frame: For validity: baseline
EuroQol 5D-5L
Time frame: For validity: baseline
Hand Grip Strength
Time frame: For validity: baseline
Pinch Strength
Time frame: For validity: baseline
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 17 Jul 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Carpal Tunnel Syndrome (CTS), run by Izmir Bakircay University at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 5 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 17 Jul 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Gülbin Ergin, PhD (+902324930000, gulbin.ergin@bakircay.edu.tr), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Jebsen-Taylor Hand Function Test (time frame: For test-retest reliability: baseline (first measurement) and retest (second measurement, 7 to 14 days after baseline)). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 17 Jul 2026; AzTrials last refreshed its copy on 30 Oct 2026.