BDNF and myocardial infarction: In the high-IL-18 group, but not in the low-IL-18 group, a higher average BDNF methylation level was associated with increases in composite MACEs (HR (95% CI) = 2.15 (1.42–3.26)), all-cause mortality (HR (95% CI) = 1.89 (1.11–3.22)), myocardial infarction (HR (95% CI) = 1.98 (1.07–3.67)), and percutaneous coronary intervention (HR (95% CI) = 1.81 (1.01–3.23)), independent of confounding variables.