An observational study in Respiratory Muscle Strength, Oxygen Saturation and Rheumatoid Arthritis (RA), sponsored by Zülal TATAR. Completed at 1 site in Turkey (Türkiye). Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-08-07.
Sponsored by Zülal TATAR · Observational
Among 126 studies in Arthritis, Rheumatoid with a site in Turkey — 14 open to participants now, 19 under way, 2 of them phase 3. Arthritis, Rheumatoid · Turkey.
Among the 126 studies in Arthritis, Rheumatoid with a site in Turkey, this one is the 48th largest by enrollment of the 49 observational ones that give a count, is one of 17 that started in 2025, is one of 49 observational ones, and was the 103rd registered.
3,332 studies on the registry are indexed under Arthritis, Rheumatoid; 443 are open to participants now.
Browse Arthritis, Rheumatoid studies →14 of the 126 studies in Arthritis, Rheumatoid with a site in Turkey are open now. Recruiting first, the newest first:
Merve Şahin · Sites in Turkey
Ages 18–65 · Healthy volunteers
Medipol University · Sites in Turkey
Ages 20–65
Hasan Kalyoncu University · Sites in Turkey
Ages 19–65
TIPMED Medical Device Manufacturing Ltd. Co. · Sites in Turkey
Ages 18+
Firat University · Sites in Turkey
Ages 18+
A study can be open while its sites in Turkey have not opened yet or have stopped. Only those recruiting at a site in Turkey →
Of the 293 Arthritis, Rheumatoid studies recruiting now, 150 (51%) set no upper age limit and 109 (37%) stop at 75 or younger; 15 take children under 18; 36 take healthy volunteers.
This study: 18 Years and older · all sexes · no healthy volunteers.
The full table on the hub →This tab as a report to print or save as PDF → With an account.
126 studies; the count open now beside each. This study's row is marked.
A study in two phases is counted once above. Listed by phase, each with its combined phases: Phase 1 1 · Phase 2 9 · Phase 3 20 · Phase 4 7
First in 2001; this study’s year is marked. 17 started in 2025.
By drug class, each counting the studies that test any of its medicines:
This study's enrollment of 24 is below the median of 176 across 1,016 observational studies indexed under Arthritis, Rheumatoid.
Median enrollment 80 across the 77 interventional studies, 100 across the 49 observational. Of the 97 that completed or were terminated, 31 (32%) have results posted.
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38 of 126 have an industry lead sponsor. The 10 most frequent:
Zülal TATAR is the lead sponsor of 6 studies on the registry; 3 are open to participants now.
Zülal TATAR has 1 study filed under Arthritis, Rheumatoid — fewer than ten, so there is no comparison to draw.
3 of the studies in Arthritis, Rheumatoid with a site in Turkey that are under way reach primary completion within a year, 0 of them phase 3. Phase 3 first, then by date:
| Study | Primary completion |
|---|---|
| NCT07627542Merve ŞahinAn Investigation of the Effect of Smartphone Usage Levels on Cervical Posture, Tongue Pressure, Balance, and Neck Disability in Individuals With Rheumatoid Arthritis and Ankylosing Spondylitis | 2026-11 |
| NCT07666594Tugba Civi KaraaslanMobile App-Based Yoga and Meditation in Rheumatoid Arthritis | 2027-05 |
| NCT07274124Medipol UniversityPain Neuroscience Education and Vagus Nerve Stimulation on Recovery in Individuals With Rheumatoid Arthritis | 2027-05 |
Among the 126 studies in Arthritis, Rheumatoid with a site in Turkey, from their registry updates:
This tab as a report to print or save as PDF → With an account.
The aim of this study was to examine the relationship between respiratory muscle strength and grip strength, muscle strength, oxygen saturation of peripheral muscles, dyspnea and respiration, cough, and health-related quality of life in individuals with Interstitial Lung Disease Associated with Rheumatoid Arthritis
Patients with rheumatoid arthritis-associated interstitial lung disease follow-up at Pamukkale University Hospital
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Evaluation of respiratory muscle strength
One of the most commonly used and noninvasive methods for assessing respiratory muscle strength is the measurement of MIP and MEP. Respiratory muscle strength was measured using a portable, electronic, oral pressure measuring device (Micro Medical MicroMPM, UK). These are intraoral pressures measured during maximal inspiration against a valve that closes the airway during maximum inspiration and expiration.
Time frame: Evaluations started immediately after receiving ethics committee approval and will be completed within 1 months, which is the study period.
Oxygen Saturation Measurement
Oxygen saturation measurement was performed with the MOXY (Fortiori Design LLC., Minnesota, USA) device. MOXY is a medical device with dimensions of 61x44x21 mm and a weight of 42 gr. It is an infrared measurement device called "near infrared spectroscopy" that measures oxygen saturation and total hemoglobin in muscle capillaries.
Time frame: Evaluations started immediately after receiving ethics committee approval and will be completed within 1 months, which is the study period.
Modified Borg Scale
Although it is frequently used today to define the severity of exertional dyspnea, it is a scale that can also be used to evaluate the severity of resting dyspnea. It consists of ten items that define the severity of dyspnea according to their degrees. Scoring is done between 0 (not at all) and 10 (very severe).
Time frame: Evaluations started immediately after receiving ethics committee approval and will be completed within 1 months, which is the study period.
Modified Medical Research Council Dyspnea Scale
It is a scale based on various physical activities that cause dyspnea. It consists of five items. The patient rates respiratory distress between 0 (no shortness of breath) and 4 (shortness of breath during activities such as being homebound and dressing).
Time frame: Evaluations started immediately after receiving ethics committee approval and will be completed within 1 months, which is the study period.
Visual Analog Scale
It consists of a 100 mm long horizontal line with the words "none" and "very severe" written on one end. The patient marks the severity of the current respiratory distress on the line using these two degrees as criteria. Scoring is done by measuring the marked area with the help of a tape measure.
Time frame: Evaluations started immediately after receiving ethics committee approval and will be completed within 1 months, which is the study period.
Leicester Cough Survey
Measures the effect of cough on quality of life. It consists of 19 questions. It has psychological, social and physical sub-dimensions. The cut-off value of the scale is not defined; low scores indicate greater effect from cough, i.e. worse quality of life. The total severity score ranges from 3 to 21.
Time frame: Evaluations started immediately after receiving ethics committee approval and will be completed within 1 months, which is the study period.
St. George's Respiratory Survey
It will be used to evaluate the health-related quality of life of the cases. SGRQ consists of three categories where the symptoms, activities and the effects of the disease on their daily lives are evaluated. The symptoms examined are cough, sputum, wheezing and shortness of breath. Physical functions, housework and hobbies are questioned to determine the activity status. These are activities limited by shortness of breath. The survey consisting of a total of 76 questions is completed in 20 minutes. There is an evaluation scale between zero and 100 points. Zero indicates perfect health status, 100 indicates the worst health status.
Time frame: Evaluations started immediately after receiving ethics committee approval and will be completed within 1 months, which is the study period.
Short Form-36 Quality of Life Survey
Short form-36 is a quality of life scale consisting of 36 items that can be filled by the patient and whose validity and reliability have been shown in studies in patients with musculoskeletal disorders. The Turkish version of SF-36 was used in our study. This scale includes 8 separate health-related headings as physical function (10 items), social function (2 items), physical role limitation (4 items), emotional role limitation (3 items), mental health (5 items), vitality (4 items), pain (2 items), general health (6 items).
Time frame: Evaluations started immediately after receiving ethics committee approval and will be completed within 1 months, which is the study period.
Health Assessment Questionnaire
Since it evaluates activities of daily living comprehensively and in all dimensions, HAQ was preferred in our study to assess the disability level. It includes 20 questions across 8 domains (dressing, arising, eating, walking, hygiene, reach, grip, and common activities). Each question is scored between 0 and 3 (without any difficulty = 0, with some difficulty = 1, with much difficulty = 2, unable to do = 3). The highest score of each subsection is summed up and divided by 8 to determine the total score between 0 and 3. A high score indicates a low functional level
Time frame: Evaluations started immediately after receiving ethics committee approval and will be completed within 1 months, which is the study period.
Disease Activity
Disease activity in rheumatoid arthritis will be assessed using the Clinical Disease Activity Index (CDAI). This index is calculated based on four main parameters: the number of painful joints, the number of swollen joints, the visual analog scale of global disease activity as assessed by the patient, and the visual analog scale of global disease activity as assessed by the physician. CDAI scores of 0-2.8 indicate remission, 2.9-10 indicate low disease activity, 11-22 indicate moderate activity, and 22-76 indicate high activity.
Time frame: Evaluations started immediately after receiving ethics committee approval and will be completed within 1 months, which is the study period.
Ran from May 2025 to primary completion in Jun 2025, 0 months.
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This study is completed, as verified in May 2025. You cannot join it, but the record below documents what was studied.
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Zülal TATAR