Fig. 2

A–C Scatterplots of SELENOP levels and biological age estimators. The x-axis is log-scaled. D–F Boxplots of biological age estimators stratified by quartiles of SELENOP (Q1: 1.26–3.13 mg/L, Q2: 3.14–3.70 mg/L; Q3: 3.71–4.27, Q4: 4.28–5.86). Statistical significance of difference between group means was assessed by t-test. Note: DNAmAA = DNA methylation age acceleration; biolog. = biological years; chron. = chronological years. Boxplots show the median, hinges (corresponding to 25 th and 75 th percentile) and whiskers (1.5*inter-quartile range (IQR))