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Table 3 Cox regression for survival time using the stepwise variable selection method.

From: Differential survival following trastuzumab treatment based on quantitative HER2 expression and HER2 homodimers in a clinic-based cohort of patients with metastatic breast cancer

Variable Category Hazard ratio 95% C.I. P-value
Log10HER2 expression (1) 75 percentile~/50~ 75 percentile 0.25 0.08 0.77 0.019
Log10HER2 expression (2) 25~ 50 percentile/50~ 75 percentile 0.79 0.32 1.97 0.610
Log10HER2 expression (3) ~ 25 percentile/50~ 75 percentile 0.12 0.03 0.51 0.004
Hormone receptor status +/- 0.18 0.04 0.71 0.014
Brain mets No/Yes 0.07 0.02 0.24 <.0001