Variance explained by the tissues and individuals. Figure is showing the distribution of the R squared statistic obtained for each CpG site. It is clearly visible, that variance explained by the individuals is insignificant - on average individuals explain only 6.4% of the variance whereas tissues explain 51.2%.
Lokk et al. Genome Biology 2014 15:r54 doi:10.1186/gb-2014-15-4-r54