IL6 and atrial fibrillation: The partial correlation analysis, controlling for age, sex, BMI and JART, showed that CSF IL‐6 levels had a significant positive correlation with STAI‐T (r = 0.25, P = 0.046) and BPNSFS‐autonomy frustration (AF) (r = 0.29, P = 0.018) (Fig. 3a,b).