Fig. 1

Associations between self-control and DNA-methylation measures of biological aging. Note The age group split presented in our findings serve to illustrate the significant interactions, as the regression analyses employ age as a continuous variable. DNAm-aging measures and self-control are scaled, and principal-component-based versions of PhenoAge and GrimAge Acceleration were used. Self-control was measured with the BTS in SOEP-G and with the grit scale in TTP. See Additional file 1: Fig. S1 for associations of DNAm with attention problems and impulsivity measures in TTP