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Table 3 The estimated minimal sample number per group for five proteins based on western blot, where power is the power of statistical test, α is the significance level, and π refers to the estimated proportion of truly differentially expressed proteins among all of the identified proteins.

From: An individual urinary proteome analysis in normal human beings to define the minimal sample number to represent the normal urinary proteome

fold change power α π FDR alpha 1 ceruloplasmin beta-2
      antitrypsin   microglobulin
2 0.8 0.001 0.05 2.31% 26 38 33
  0.8 0.005 0.1 5.33% 20 30 26
  0.8 0.01 0.2 4.76% 18 26 22
  0.9 0.001 0.05 2.06% 31 46 39
  0.9 0.005 0.1 4.76% 25 37 31
  0.9 0.01 0.2 4.26% 22 33 28
1.5 0.8 0.001 0.05 2.31% 93 143 121
  0.8 0.005 0.1 5.33% 73 111 95
  0.8 0.01 0.2 4.76% 64 98 83
  0.9 0.001 0.05 2.06% 113 174 148
  0.9 0.005 0.1 4.76% 91 139 118
  0.9 0.01 0.2 4.26% 81 124 105