Related Experiment Video
Updated: Dec 26, 2025
Phenotypic Analysis of Rodent Malaria Parasite Asexual and Sexual Blood Stages and Mosquito Stages
Published on: May 30, 2019
Center-edge angle values in healthy children between 5 and 14 years old in Turkey
Ali İhsan Tuğrul1, Güney Yılmaz2, Bahattin Kerem Aydın3
1Department of Orthopaedics and Traumatology, Beyhekim State Hospital, Konya,Turkey.
Insights
This study established age-specific center-edge angle (CEA) limits for mild and severe hip dysplasia in Turkish children aged 5-14. These findings aid in diagnosing and managing developmental dysplasia in this population.
Area of Science:
- Pediatric Orthopedics
- Radiology
- Developmental Dysplasia of the Hip
Background:
- Developmental Dysplasia of the Hip (DDH) diagnosis relies on radiographic parameters.
- The center-edge angle (CEA) is a key measurement for assessing acetabular development.
- Establishing normative CEA values in specific populations is crucial for accurate diagnosis.
Purpose of the Study:
- To determine age, gender, and side-specific center-edge angle (CEA) values in healthy Turkish children aged 5-14.
- To define angular limits for mild and severe hip dysplasia based on these normative values.
Main Methods:
- Retrospective analysis of pelvis and lower abdomen radiographs from 1596 healthy children (5-14 years).
- Measurements of CEA performed by a single investigator using a standardized computer-aided method.
- Inter-observer reliability tested on a subset of radiographs.
Main Results:
- Mean CEA was 26.2°±5.5° across 3192 hips.
- No significant difference in mean CEA between genders (p=0.224).
- Mild dysplasia borderline identified in 14% of hips, severe in 2.2%.
- CEA values showed an increase with age, with age-specific dysplasia limits established.
Conclusions:
- Age-defined mild and severe dysplasia limits for CEA in the Turkish population were established.
- These normative values will assist clinicians in diagnosing, monitoring, and planning treatment for developmental dysplasia.
Objective:
The aim of this study was to determine the center-edge angle (CEA) values according to age, gender and side in healthy children between 5 and 14 years old in Turkey and to find out the angular limit values for mild and severe dysplasia.
Methods:
The data pool that was gathered to investigate the frequency of hip dislocation in children between 6 months and 14 years old in Turkey was used. The data pool consists of pelvis and lower abdomen radiographs obtained for reasons other than hip dysplasia. Lower abdomen/pelvis radiographies of children between 5 and 14 years old were extracted from the data pool and were evaluated. Distribution of CEA values according to age, gender and side was examined. Measurements were performed by a single investigator on computer by using a standard method. Reliability of the measurements was tested by three different investigators on randomly selected films by using the standard method.
Results:
CEA values of 3192 hips of 1596 children, who had no hip pathology, were measured. Mean CEA value was found as 26.2°±5.5°. The mean CEA was 26.2°±5.3° in males (%54) and 26.2°±5.7° in females (%46) (p=0.224). Mean values for the right and left hips were 25.7°±5.4° and 26.6°±5.6°, respectively. CEA value of 449 (14%) hips of 333 (20.8%) children was at the limit of mild dysplasia and CEA value of 70 (2.2%) hips of 58 (3.6%) children was at the limit of severe dysplasia. CEA values had increased by age and mild and severe dysplasia limits were determined for every age group.
Conclusion:
The mild and severe dysplasia values that are defined according to ages in Turkish population will guide the investigators in the diagnosis, follow-up and treatment planning of developmental dysplasia.
Level Of Evidence:
Level IV, Diagnostic Study.