An observational study in Chronic Coccydynia and Alexithymia, sponsored by Marmara University. Recruiting at 1 site in Turkey (Türkiye). Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-08-12.
Sponsored by Marmara University · Observational
Among 15 studies in Affective Symptoms with a site in Turkey — 4 open to participants now, 5 under way, none of them phase 3. Affective Symptoms · Turkey.
Among the 15 studies in Affective Symptoms with a site in Turkey, this one is one of 6 that started in 2026, is one of 5 observational ones, and was the 11th registered.
85 studies on the registry are indexed under Affective Symptoms; 20 are open to participants now.
This study's planned enrollment of 15 is below the median of 70 across 21 observational studies indexed under Affective Symptoms.
Browse Affective Symptoms studies →4 of the 15 studies in Affective Symptoms with a site in Turkey are open now, in 1 country. Each count lists the studies.
Of the 11 Affective Symptoms studies recruiting now, 4 (36%) set no upper age limit and 7 (64%) stop at 75 or younger; 5 take children under 18; 4 take healthy volunteers.
This study: 18 Years and older · all sexes · no healthy volunteers.
The full table on the hub →15 studies; the count open now beside each. This study's row is marked.
First in 2016; this study’s year is marked. 6 started in 2026.
Median enrollment 65 across the 10 interventional studies, 70 across the 5 observational. Of the 7 that completed or were terminated, 0 (0%) have results posted.
None of the 15 has an industry lead sponsor. The 10 most frequent:
Marmara University is the lead sponsor of 599 studies on the registry; 138 are open to participants now.
Marmara University has 4 studies filed under Affective Symptoms — fewer than ten, so there is no comparison to draw.
2 of the studies in Affective Symptoms 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 |
|---|---|
| NCT07828145Marmara UniversityAlexithymia, Pain Intensity, Quality of Life, and Psychological Symptoms in Chronic Coccydynia Patients Scheduled for Ganglion Impar Block | 2027-03 |
| NCT07696260Marmara UniversityEvaluation of Alexithymia and Its Relationship With Clinical Parameters in Patients With Chronic Coccydynia | 2027-03 |
Among the 15 studies in Affective Symptoms with a site in Turkey, from their registry updates:
This study aims to investigate the prevalence and levels of alexithymia in patients diagnosed with chronic coccydynia (tailbone pain lasting for 3 months or longer) and to explore its relationship with various clinical and psychological parameters. Chronic coccydynia can significantly impair daily activities, functionality, and reduce quality of life. Participants in this prospective, observational study will be evaluated during their routine visits to the pain management clinic. Evaluation of the participants will be performed using validated self-report questionnaires, including the Toronto Alexithymia Scale (TAS-20) for alexithymia, the Hospital Anxiety and Depression Scale (HADS) for mood symptoms, the Childhood Trauma Questionnaire (CTQ-33) for early life adverse experiences, the Visual Analog Scale (VAS) for pain intensity, and the 12-Item Short Form Health Survey (SF-12) for quality of life. The primary objective of the study is to determine how alexithymia relates to pain severity, duration, emotional symptoms, childhood trauma history, and overall quality of life in this specific population. The results of this pilot study may help strengthen the biopsychosocial approach in the evaluation of chronic coccydynia and optimize future multidisciplinary treatment strategies.
Chronic coccydynia is a persistent pain condition localized to the coccygeal region, often exacerbated by sitting and significantly impairing daily activities, functionality, and health-related quality of life. While biomechanical and structural variables play a substantial role in its etiology, the pain can become chronic, making it difficult to explain solely through structural changes. Chronic pain is a complex phenomenon that interacts bidirectionally with cognitive-emotional processes and stress response systems. Within this framework, alexithymia-characterized by difficulty identifying and describing emotions-has been recognized as a psychological trait associated with higher pain intensity and functional interference in chronic pain populations.
The relationship between chronic pain, anxiety, depressive symptoms, and early adverse life events such as childhood trauma is also clinically critical, as these factors can amplify pain perception and restriction of activities. Despite these known associations in general chronic pain conditions, studies comprehensively evaluating alexithymia levels alongside pain duration, mood symptoms, childhood trauma history, and quality of life specifically within the coccydynia population remain limited. This gap in the literature underscores the importance of systematically examining the biopsychosocial components of chronic coccydynia to help optimize multidisciplinary treatment planning.
This prospective, observational cohort study aims to investigate the presence and levels of alexithymia in patients with chronic coccydynia (≥3 months) and to analyze its relationship with clinical and psychological variables. Patients presenting with tailbone pain will be evaluated at the multidisciplinary clinics. Following written informed consent, data collection will be completed in a single session utilizing a comprehensive battery of validated psychometric instruments. These include the Visual Analog Scale (VAS) for pain intensity, the 20-item Toronto Alexithymia Scale (TAS-20), the Hospital Anxiety and Depression Scale (HADS), the 33-item Childhood Trauma Questionnaire (CTQ-33), and the 12-item Short-Form Health Survey (SF-12). The findings are expected to contribute to the early identification of high-risk patient subgroups and strengthen the integration of supportive psychosocial interventions into future chronic pain management protocols.
Patients aged 18 and older who present to the algology outpatient clinic and meet the diagnostic criteria for chronic coccydynia lasting for 3 months or longer.
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.
Being older than 18 years of age
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Cancer (malignancy)
Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.
Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Patients aged 18 and older who present to the algology outpatient clinic with a diagnosis of chronic coccydynia lasting for 3 months or longer. Participants will undergo a single-time biopsychosocial assessment using validated psychometric scales including TAS-20, HADS, CTQ-33, VAS, and SF-12 during their routine evaluation.
Toronto Alexithymia Scale (TAS-20) Score
A 20-item self-report questionnaire used to evaluate the presence and severity of alexithymia. It assesses three subscales: difficulty identifying feelings, difficulty describing feelings, and externally-oriented thinking. Total scores range from 20 to 100, where higher scores indicate a higher level of alexithymia.
Time frame: Baseline (Single-time assessment during the clinical interview)
Visual Analog Scale (VAS) for Pain
A 10-cm horizontal scale used to measure pain intensity. Scores range from 0 (no pain) to 10 (worst possible pain). Participants indicate their current tailbone pain level on this line.
Time frame: Baseline (Single-time assessment)
Hospital Anxiety and Depression Scale (HADS) Score
A 14-item self-report questionnaire consisting of two subscales: anxiety (7 items) and depression (7 items). Each subscale is scored from 0 to 21, where higher scores reflect greater severity of anxiety or depression. Cut-off scores are 10 for anxiety and 7 for depression.
Time frame: Baseline (Single-time assessment)
Childhood Trauma Questionnaire (CTQ-33) Score
A 33-item scale evaluating retrospective childhood and adolescent adverse experiences. It assesses emotional abuse, physical abuse, sexual abuse, emotional neglect, physical neglect, and overprotection-control. Total scores range from 25 to 150, with higher scores representing more severe childhood trauma.
Time frame: Baseline (Single-time assessment)
Short Form Health Survey (SF-12) Score
A 12-item health-related quality of life survey consisting of 8 domains. Total and component scores range from 0 to 100, where higher scores indicate better health-related quality of life.
Time frame: Baseline (Single-time assessment)
Plan to share: No
No publications or documents are linked to this record.
Started Mar 2026 (actual). Primary completion is estimated for Mar 2027, 12 months after the start.
How these figures are worked out, and which studies are left out of them.
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
No contact was published for this record. The registry link below has the sponsor’s details.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.