Additional file 1 of Genome-wide analysis of DNA methylation and risk of cardiovascular disease in a Chinese population

Additional file 1: Figures S1–S4 and Tables S1–S2. Figure S1. Flow chart of study sample selection. Figure S2. Singular value decomposition (SVD) analysis by data before processing by COMBAT. Figure S3. Singular value decomposition (SVD) analysis by data after processing by COMBAT. Figure S4. Principal component analysis (PCA) based on plate number (A), chip number (B), date of test (C) and gender (D). Table S1. The top 5 principal components (PCs) with proportion of variance more than 0.01 used for epigenomewide association analysis in the discovery set. Table S2. The top 5 principal components (PCs) with proportion of variance more than 0.01 used for epigenomewide association analysis in the replication set.