[Possible influence of knee scores]

Area of Science:

• Orthopedics
• Rheumatology
• Biostatistics

Background:

• Osteoarthritis (OA) assessment relies on various scoring systems.
• Standardization of OA evaluation is crucial for reliable patient outcomes.
• Comparing subjective and objective measures in knee OA is essential.

Purpose of the Study:

• To evaluate and compare the reliability of multiple knee osteoarthritis scoring systems.
• To assess inter-examiner agreement across different OA assessment tools.
• To identify the strengths and limitations of each scoring system in clinical practice.

Main Methods:

• Ninety-six knee joints with Grade I osteoarthritis were assessed.
• Utilized Larson, Lysholm, Marshall, Orthopädische Arbeitsgemeinschaft Knie (OAK), Hospital for Special Surgery (HSS), Visual Analog Scale (VAS), Tegner, and International Knee Documentation Committee (IKDC) scoring systems.
• Employed statistical analyses including the Friedmantest and Bowkertest for significance.

Main Results:

• High correlations were observed in inter-examiner agreement across most scoring systems.
• The Lysholm score demonstrated significant examiner-dependent variability and strictness.
• The Visual Analog Scale (VAS) showed patient-reported difficulties and a tendency towards middle values, despite high correlation with other measures.
• Tegner activity level, used once, was insufficient for assessing knee joint damage limitations.

Conclusions:

• While examiner agreement is generally high in knee OA assessment, specific tools like the Lysholm score require careful application due to examiner dependency.
• The Visual Analog Scale (VAS) has limitations in patient use but correlates well with other validated measures.
• Further research may be needed to refine the use of activity level scales in OA evaluation.