The leave-one-out analysis showed that, after sequentially removing individual SNPs, the combined effect estimates of the remaining SNPs remained consistent with the overall results (β range: -0.483 to -0.417, all P values < 0.05), indicating that the negative association between glutamine and late-onset myasthenia gravis risk is not driven by a single SNP, and the results are stable and reliable. The visualization in Figure 3 further confirms these findings.