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Table 1 Characteristics of three scenarios for the TCGA-BRCA dataset. The distributions of ages and tumor stages were balanced

From: Flimma: a federated and privacy-aware tool for differential gene expression analysis

  Cohort sizes Frequency of basal subtype Frequency of LumA subtype
  Cohort 1 Cohort 2 Cohort 3 Cohort 1 Cohort 2 Cohort 3 Cohort 1 Cohort 2 Cohort 3
No imbalance 283 283 284 0.20 0.20 0.20 0.57 0.57 0.58
Mild imbalance 121 242 487 0.10 0.30 0.17 0.40 0.50 0.66
Strong imbalance 65 196 589 0.25 0.50 0.09 0.14 0.50 0.65