Chair-Integrated Foam Modifications in Coccydynia

KTO Karatay University48 enrolled

Overview

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).

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.

Study Type

INTERVENTIONAL

Allocation

RANDOMIZED

Purpose

TREATMENT

Masking

NONE

Enrollment

Conditions

Coccydynia

Interventions

Ergonomic Chair with Foam Type ADEVICE

Ergonomic chair incorporating Foam Type A.

Ergonomic Chair with Foam Type BDEVICE

Ergonomic chair incorporating Foam Type B.

Ergonomic Chair with Foam Type CDEVICE

Ergonomic chair incorporating Foam Type C.

Eligibility

Sex: ALLMin age: 18 YearsMax age: 65 Years

Medical Language ↔ Plain English

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

Locations (1)

Kto Karatay University

Konya, Turkey (Türkiye)

Outcomes

Primary Outcomes

Pressure Distribution Measurement (Load Cell-Equipped Chair System)

Assessment of sitting pressure distribution across right, left, and central regions in kilograms using a custom-designed load cell-integrated chair.

Time frame: Baseline + 1 week

Paris Questionnaire

Evaluation of pain and functional status associated with coccydynia.

Time frame: Baseline + 1 week

Secondary Outcomes

Extended Nordic Musculoskeletal Questionnaire (NMQ-E)

Evaluation of musculoskeletal symptoms related to different body regions.

Time frame: Baseline + 1 week

EuroQol Quality of Life Scale (EQ-5D-3L)

Assessment of general health-related quality of life.

Time frame: Baseline + 1 week

Data from ClinicalTrials.gov

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