Detection of a Novel, Integrative Aging Process Suggests Complex Physiological Integration (original) (raw)
Fig 3
Correlations among the first three PCA axes (“pca1”, “pca2”, and “pca3”).
Correlations were calculated from the full merged 43-variable data set or from each of the separate data sets (WHAS: w; InCHIANTI: i; BLSA: b). The loadings from each subset-based PCA are reapplied to the full data set to calculate the scores used in the correlations. Ellipses below the diagonal indicate correlations visually: blue when positive, red when negative, and darker and narrower when stronger. Correlation coefficients are above the diagonal.