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Updated: May 12, 2026
10:42
A Postoperative Evaluation Guideline for Computer-Assisted Reconstruction of the Mandible
Published on: January 28, 2020
Intra- and Inter-Rater Reliability and Validation of Orofacial Cleft Classification in the Cleft Collective Cohort
Amy Davies1,2, David Sainsbury3, 4
1The Cleft Collective, Bristol Dental School, The University of Bristol, Bristol, UK.
Summary
Classifying orofacial clefts becomes less reliable as classifications increase in complexity. Simpler cleft classifications show higher rater agreement, crucial for clinical care and research.
Area of Science:
- Craniofacial Anomalies
- Medical Informatics
- Clinical Validation Studies
Background:
- Accurate classification of orofacial clefts is vital for consistent clinical care and research.
- Existing classification systems vary in complexity, potentially impacting inter-rater reliability.
- The Cleft Collective cohort provides a unique dataset for evaluating classification agreement.
Purpose of the Study:
- To assess intra- and inter-rater agreement for different orofacial cleft classification systems.
- To validate the reliability of various cleft classification methods, including LAHSAL.
- To identify factors influencing agreement in orofacial cleft classification.
Main Methods:
- A validation study design was employed using data from the UK's Cleft Collective cohort (n=4211).
- Four distinct orofacial cleft classification systems were evaluated, ranging from simple to complex (including LAHSAL).
- Data from seven sources were analyzed for agreement using Krippendorf's Alpha.
Main Results:
- High intra-rater agreement was observed for mothers using the simplest classification (Alpha=0.987).
- Inter-rater agreement was highest for the simplest classification (Alpha=0.957) and lowest for LAHSAL (Alpha=0.538).
- Agreement decreased significantly as classification complexity, particularly sidedness and completeness, increased.
Conclusions:
- Increased complexity in orofacial cleft classification correlates with reduced agreement among raters and sources.
- The LAHSAL system, while advocated, requires rigorous training to ensure consistent application.
- Standardizing and validating cleft classification are essential for improving both clinical management and research outcomes.
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