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Studies how smartphone use relates to neck posture in arthritis patients

Compares neck posture and balance in rheumatoid arthritis and spondylitis patients.

Key facts

Who runs it
Merve Şahin
Where
Konya, TürkiyeSee the site
Trial code
Registry title
An 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
Status
Recruiting
People taking part
111 people, planned
Started
9 Apr 2026
Expected to end
Nov 2026
Type of study
Observational, 3 groups
Record updated
9 June 2026

Who can take part

AI summary

From the trial's eligibility criteria. Machine-read from the registry text on this page, so it can be wrong. The registry text below and the trial team decide who can take part.

The trial is looking for adults aged 18 to 65 who use a smartphone at least 2 hours a day. They have stable rheumatoid arthritis (RA), stable ankylosing spondylitis (AS), or are healthy controls.

Age
18 to 65 years
Sex
All sexes can join.
Disease stage
RA group: diagnosed by a rheumatologist, with stable disease activity (DAS28 < 3.2). AS group: diagnosed by a rheumatologist, with stable disease activity (BASDAI < 4).
Earlier treatment
People who actively use muscle relaxants or advanced sedative medications cannot join.

Main reasons for not taking part

  • Past surgery in the neck area
  • Neurological diseases such as Parkinson's disease or ALS
  • Severe vision or hearing problems
  • Vestibular (inner ear balance) disorders
  • Acute neck injury or cancer

The registry criteria, word for word

Show all 13 criteriaShow less

Who can take part

  • Aged 18 to 65 years
  • Using a smartphone for at least 2 hours daily
  • Able to understand and follow postural commands during clinical measurements
  • For the Rheumatoid Arthritis (RA) Group: Diagnosed with RA by a rheumatologist, with a stable disease activity score (DAS28 < 3.2)
  • For the Ankylosing Spondylitis (AS) Group: Diagnosed with AS by a rheumatologist, with a stable disease activity score (BASDAI < 4)

Who cannot take part

  • History of prior surgical intervention in the cervical region
  • Active use of muscle relaxants or advanced sedative medications
  • Presence of neurological diseases (e.g., Parkinson's disease, ALS)
  • Severe visual or hearing impairment
  • Vestibular system disorders
  • Presence of acute neck trauma or malignancy
  • Severe limitation in jaw opening
  • Lower extremity amputation or advanced arthritis that prevents performing the balance test

Check if you might fit

Answer for yourself. This is not a decision: only the study team can say whether you can take part.

  • Are you between 18 and 65 years old?

Where in Türkiye

  • Necmettin Erbakan University Faculty of Medicine Hospital, Rheumatology Outpatient ClinicKonya, TürkiyeContact: Mustafa Ç ERGÜN, MD, Assistant ProfessorTaking people

About the trial

What the trial wants to find out

The purpose of this cross-sectional and comparative study is to investigate the impact of smartphone addiction on the cervical posture, musculoskeletal system, balance, and tongue pressure in individuals diagnosed with Rheumatoid Arthritis (RA) and Ankylosing Spondylitis (AS), and to compare these findings with a healthy control group. Smartphone addiction has become a major contributing factor to postural alterations such as Text Neck Syndrome. This study aims to evaluate and compare the Craniovertebral Angle (CVA), neck extensor muscle strength, Pressure Pain Thresholds (PPT) of the neck and shoulder, Single-Leg Stance (SLS) static balance, and tongue pressure among three distinct groups. A healthy control group will be included as a reference baseline to differentiate the postural and functional deterioration caused by rheumatological diseases from the additional mechanical load imposed by smartphone dependency. To eliminate the misleading effects of acute pain, joint swelling, and severe functional limitations during flare-ups, only patients with stable disease activity (DAS28 < 3.2 for RA and BASDAI < 4 for AS) will be enrolled. This approach aims to examine the pure biomechanical relationship between technological dependency and cervical functions, independent of active systemic inflammation.

The 3 groups in the trial

  • Rheumatoid Arthritis (RA) Group

    Patients diagnosed with Rheumatoid Arthritis by a rheumatologist, with a stable disease activity score (DAS28 \< 3.2), aged 18-65, and using a smartphone for at least 2 hours daily.

  • Ankylosing Spondylitis (AS) Group

    Patients diagnosed with Ankylosing Spondylitis by a rheumatologist, with a stable disease activity score (BASDAI \< 4), aged 18-65, and using a smartphone for at least 2 hours daily.

  • Healthy Control Group

    Healthy individual volunteers aged 18-65 with no history of rheumatological, neurological, or chronic musculoskeletal diseases, and using a smartphone for at least 2 hours daily.

Questions to ask the study team

  1. How often do I need to come in, and for how long each time?
  2. Are travel costs paid?
  3. Can I keep my own doctor?
  4. What happens if I want to stop?

Contact the study team: see the registry record → Contacts and Locations

Print a page for my doctor

Data and sources

Registry record
Listed on ClinicalTrials.gov.
Official title
An 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
Plain-language title
Studies how smartphone use relates to neck posture in arthritis patientsGenerated from the registry record. The registry title is the official one.
AI summary
From the trial's eligibility criteria. Read by machine on 12 November 2026.
Fit questions
Built from NCT07627542, who can take part
Record updated
9 June 2026