IL6 and cancer: We further analyzed the control post-intervention studies in the cancer group: the AC (SMD = 0.07; 95% CI, −0.30 to 0.44) exerted a mild increasing effect, and the TAU (SMD = −0.64; 95% CI, −3.08 to 1.80) exerted an obvious decreasing effect on IL-6 (Table 3).