Additional file 1.

Schizophrenia status has a negligible effect on aging effects. A scatterplot of correlation test P-values for correlations between age and methylation profiles in schizophrenia cases (x-axis) and healthy controls (y-axis) based on the Dutch whole blood data sets (data sets 2 and 3). Additional file 1 shows that schizophrenia disease status has a negligible effect on aging-related changes for the vast majority of CpG sites.

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Horvath et al. Genome Biology 2012 13:R97   doi:10.1186/gb-2012-13-10-r97