HAS THE AHLBÄCK CLASSIFICATION BEEN ACCURATELY DESCRIBED AND CITED?

Area of Science:

• Orthopedics and Sports Medicine
• Rheumatology
• Medical Imaging Analysis

Background:

• Knee osteoarthritis (OA) classification aids in assessing disease severity and guiding treatment.
• The Ahlbäck classification is a widely utilized system for grading knee OA severity.
• Accurate understanding and application of classification systems are crucial for consistent clinical practice and research.

Purpose of the Study:

• To evaluate the fidelity of the original Ahlbäck classification description in subsequent publications.
• To assess the accuracy of citations referencing the original Ahlbäck classification.
• To quantify the prevalence of correct versus incorrect reporting and citation of the Ahlbäck classification.

Main Methods:

• Systematic literature search conducted in PubMed, Embase, and Cochrane databases.
• Inclusion criteria focused on articles using the terms 'knee', 'osteoarthritis', 'osteoarthrosis', and 'Ahlbäck classification'.
• Analysis of 64 selected articles for accuracy in describing the Ahlbäck classification and citing the original source.

Main Results:

• Only 15.6% of reviewed articles accurately described the Ahlbäck classification and cited the original source.
• A significant majority, 58.4%, contained errors in both the classification description and the bibliographic reference.
• The study highlights a substantial discrepancy between the original Ahlbäck classification and its subsequent representation in literature.

Conclusions:

• The accurate reporting and citation of the Ahlbäck classification in published literature are alarmingly low.
• This systematic review underscores the need for improved adherence to established classification criteria in knee osteoarthritis research.
• Revisiting and reinforcing the correct application of the Ahlbäck classification is essential for reliable knee OA assessment and management.