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Relative importance ranking of each input variable for prediction of CLNM in the machine learning models. (A) RF model; (B) XGB model; (C) GBM model; (D) NNET model. CLNM, Central lymph node metastasis; ETE, extrathyroidal extension; LLNM, lateral lymph node metastasis; CLT, chronic lymphocytic thyroiditis; RF, Random Forest; XGB, Extreme Gradient Boosting; GBM, Gradient Boosting Machine; NNET, Neural Network.
