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Table 4 Distribution of the factor variants over the two classes obtained with k-means clustering of 2nd-log obs/exp. Sex, biopsy and tissue were compared with chi-square, age and proteasome expression level with Wilcoxon.

From: Epigenetic hereditary transcription profiles II, aging revisited

Factor variants class 1 class 2 P-value
sex male 18 18 0,432
  female 27 19  
biopsy surgery 36 26 0,544
  autopsy 9 9  
tissue endodermic 14 20 0.157
  mesodermic 19 21  
age in years 53,5 61,9 3,64E-06
expression level   91,9 90,0 0,592