Figure 5
From: ER and HER2 expression are positively correlated in HER2 non-overexpressing breast cancer
Kaplan-Meier plots for relapse-free survival in HER2-ve cases. (a, b) Relapse-free survival by ER and HER2 RNA quartiles (qRT-PCR), respectively, in the HER2-ve population of the ABC study, irrespective of ER status. (c, d) Relapse-free survival by ER and HER2 RNA quartiles, respectively, in the subgroup of ER+ve HER2-ve cases of the ABC study. (e, f) Relapse-free survival by ER and HER2 RNA quartiles, respectively, in the ER+ve HER2-ve cohort of the TransATAC study. First quartile defined as the lowest RNA levels for ER and HER2. N.B.: The y-axis scale in the ABC study is different from that in the TransATAC study. ER, estrogen receptor; HER2, human epidermal growth factor receptor 2; qRT-PCR, quantitative reverse-transcription polymerase chain reaction.