Additional file 1: Figure S1. of Peripheral blood methylation profiling of female Crohn’s disease patients

Exploratory data analysis of putative biological confounders. a) Variance explained per principal component based on our 450k data (turquoise triangles) versus randomly generated data (red circles). b) Dot-boxplot of the cellular composition as estimated by the Houseman algorithm [22, 23]. c) Pearson correlation coefficient (R2) of each blood cell proportion with the principal components. The statistically significant correlations are indicated in turquoise, whereas statistically non-significant associations are indicated in red. Similar correlations were calculated for d) age and e) anti-TNF usage. (PDF 119 kb)