IL6 and coronary artery disorder: There were significant differences before or after subgroup analyses in the stratum of coronary artery disease [SMD = −0.70, 95% CI (−1.82, 0.42), p > 0.05] and the stratum of ischaemic stroke [SMD = −0.43, 95% CI (−2.91, 2.05), p > 0.05] for IL-6.