TPO and Guillain-Barre syndrome: In the GBS and CIDP groups, GBS patients with TPO-Ab>133 IU/mL or TG-Ab>261.1 IU/mL and CIDP patients were used as classification dependent variables, respectively, and general patient data, including sex, age, and levels of TT3, TT4, TSH, FT3, FT4, TPO-Ab, TG-Ab, and HFGS, were used as independent variables for univariate logistic regression analysis.