TG and Paroxysmal atrial fibrillation: Logistic regression analysis was performed to assess the relationship between thyroid hormone sensitivity indices and AF classification.<h4>Results</h4>Compared with the paroxysmal AF group, patients with persistent AF exhibited significantly higher PTFQI and TT4RI values and a lower FT3/FT4 ratio (<i>P</i> for trend <0.001).