Coccydynia
Conditions
Keywords
Chair ergonomics, Foam geometry, Coccydynia, Pain, Pressure distribution, Sitting comfort
Brief summary
The aim of this study is to evaluate the effects of chairs with different ergonomic designs on quality of life, discomfort, and pain in individuals with coccydynia (tailbone pain).
Detailed description
Participants aged 18-65 years who work at a desk for at least 5-6 hours per day will be included in the study. Information such as age, height, body weight, education level, family type, smoking status, sex, marital status, working posture (sitting, standing, or both), duration of working hours, job type (production or administrative), regular exercise habits, presence of chronic diseases, and absence of any spinal problems (e.g., no diagnosed lumbar disc herniation) will be recorded. Participants will be randomly assigned to six groups. Before using the chairs, participants will be seated on a load cell-equipped chair to assess weight distribution. The distribution of body weight across different regions while sitting will be recorded in kilograms. This measurement will be repeated three times, and the average will be recorded. After the measurement, participants will be provided with specially designed chairs and asked to work using these chairs. Six different chair designs will be developed for the study. The reason for having six types of chairs is that the foam properties used in each chair will differ from one another.
Interventions
DEVICEErgonomic Chair with Foam Type A
Ergonomic chair incorporating Foam Type A.
DEVICEErgonomic Chair with Foam Type B
Ergonomic chair incorporating Foam Type B.
DEVICEErgonomic Chair with Foam Type C
Ergonomic chair incorporating Foam Type C.
DEVICEErgonomic Chair with Foam Type D
Ergonomic chair incorporating Foam Type D
DEVICEErgonomic Chair with Foam Type E
Ergonomic chair incorporating Foam Type E
DEVICEErgonomic Chair with Foam Type F
Ergonomic chair incorporating Foam Type F
Sponsors
KTO Karatay University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Intervention model description
Participants will be randomly assigned to six parallel groups, each receiving a different chair design with distinct foam properties.
Eligibility
Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No
Inclusion criteria
* Aged between 18 and 65 years * Working at a desk for at least 5-6 hours per day * Experiencing coccydynia (tailbone pain) * Able to sit independently without assistive support * No diagnosed spinal disorders (e.g., lumbar disc herniation) * Willing to use the assigned chair during working hours for 1 week * Able to understand and complete questionnaires * Provided written informed consent
Exclusion criteria
* History of spinal surgery * Diagnosed spinal disorders (e.g., lumbar disc herniation, scoliosis, severe degenerative spine disease) * Neurological disorders affecting posture, sitting balance, or sensation * Severe musculoskeletal conditions (e.g., hip or pelvic disorders) that may affect sitting * Pregnancy * Inability to sit for prolonged periods * Use of assistive seating devices (e.g., orthopedic cushions) during the study period * Regular use of pain medication that may affect outcome measures
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Pressure Distribution Measurement (Load Cell-Equipped Chair System) | Baseline + 1 week | Assessment of sitting pressure distribution across right, left, and central regions in kilograms using a custom-designed load cell-integrated chair. |
| Paris Questionnaire | Baseline + 1 week | Evaluation of pain and functional status associated with coccydynia. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Extended Nordic Musculoskeletal Questionnaire (NMQ-E) | Baseline + 1 week | Evaluation of musculoskeletal symptoms related to different body regions. |
| EuroQol Quality of Life Scale (EQ-5D-3L) | Baseline + 1 week | Assessment of general health-related quality of life. |
Countries
Turkey (Türkiye)
Outcome results
None listed