(A) Horvath clock, (B) Hannum clock, (C) DNAm PhenoAge clock, (D) DNAm PAI-1 epigenetic predictor, (E) DNAm GrimAge clock.
PTE = Proportion of Treatment Effect, CI = confidence intervals, FHS = Framingham Heart Study, ARIC = Atherosclerosis Risk in Communities, CHS = Cardiovascular Health Study.
Tests for overall effect heterogeneity performed with the Q- and I-squared statistics.