Indication‐stratified analysis revealed heterogeneity: thymic malignancy carried significantly higher mortality (HR 2.4; p = 0.001), while myasthenia gravis patients showed a favorable trend.
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Indication‐stratified analysis revealed heterogeneity: thymic malignancy carried significantly higher mortality (HR 2.4; p = 0.001), while myasthenia gravis patients showed a favorable trend.