Patient-clustered bootstrap analysis yielded similar results, with the combined model maintaining the highest discriminative performance (clustered AUC = 0.825), though the difference did not reach statistical significance compared with the radiomics model (AUC = 0.782).
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High-Frequency Ultrasound Radiomics Combined with Clinical Features for Detecting OMERACT-Defined Metacarpophalangeal Joint Cartilage Damage in Early Rheumatoid Arthritis
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