Fig. 2
From: Associations between indicators of socioeconomic position and DNA methylation: a scoping review
The stages in the life course captured by socioeconomic position exposure and DNA methylation assessment. The stages in the life course captured by socioeconomic position (SEP) exposure age and age at DNA methylation (DNAm) assessment are plotted by study design (cross-sectional, prospective, longitudinal) across all 37 studies included in review. Life-course stages include prenatal (< 0), birth (0), child (0–18 years), and adult (18+ years). Cross-sectional studies captured SEP exposure(s), and assessed DNA methylation at the same time in the life course; prospective studies prospectively assessed SEP exposure(s) no more than once over the life course; longitudinal studies prospectively assessed the same SEP exposure(s) at least twice over the life course. Solid lines indicate SEP was prospectively assessed, while dotted lines indicate SEP was retrospectively captured. Note: Karlsson Linnér et al. and Van Dongen et al. were meta-analyses