Validity of laryngomalacia classification systems: A multi-institutional agreement study

Area of Science:

• Otolaryngology
• Pediatric Medicine
• Medical Diagnostics

Background:

• Laryngomalacia (LM) is a common congenital condition affecting infants.
• Standardized classification systems are crucial for consistent diagnosis and management of LM.
• Existing classification systems for LM may have limitations in inter-observer reliability.

Purpose of the Study:

• To assess the agreement among paediatric otolaryngologists in classifying laryngomalacia.
• To compare the reliability of the Holinger and Olney classification systems for LM.

Main Methods:

• A study involving three paediatric otolaryngologists who independently reviewed videos of 73 children diagnosed with LM.
• Two established classification systems, Holinger and Olney, were used.
• Inter- and intra-observer agreement was measured using Fleiss and Cohen's kappa coefficients.

Main Results:

• Overall inter-observer agreement was modest for both Holinger (kappa=0.25) and Olney (kappa=0.31) classifications.
• Intra-observer agreement varied, with higher values for the Olney classification in some instances.
• Agreement on individual anatomical subunits affected by LM was also assessed.

Conclusions:

• The Holinger and Olney classification systems demonstrate only modest agreement among expert observers for laryngomalacia.
• This lack of strong agreement has implications for consistent diagnosis and hinders reliable data aggregation in LM research.
• Further refinement of classification systems may be needed to improve diagnostic accuracy and facilitate collaborative studies.