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Table 1 ER status is predictive of metastasis in the NKI2 and TRANSBIG data sets.

From: Intrinsic bias in breast cancer gene expression data sets

    Recurrence Event1 Recurrence2
(ER+ vs ER-)
Data set ER+ (n) ER- (n) ER+ (%) ER- (%) HR p-value
NKI2 225 70 24 47 0.4 <0.0001
Wang 209 77 32 35 0.8 0.5
TRANSBIG 136 64 13 28 0.4 0.005
KJX64/KJ125 149 34 22 29 0.7 0.4
  1. 1. The percentages indicate the proportion of patients that had metastases within 5 years, stratified by the ER status of their primary tumors.
  2. 2. Hazard ratios (HR) and p-values are based on Cox proportional hazards regression analyses and represent the changes in the risk of experiencing a metastatic event for ER positive tumors, as compared to ER negative tumors.