IL6 and classic Hodgkin lymphoma: Among the 86 cHL patients, the Kaplan–Meier curves elucidated that cHL patients with relatively lower IL‐6 level (<4.285 pg/mL), or lower LDH level (<174.5 U/L) had better RFS than those with higher IL‐6 level (≥4.285 pg/mL, p = 0.014), or higher LDH level (≥174.5 U/L, p = 0.006) (Figures 3C and 3D).