Figure 2From: Prognostic effect of preoperative serum estradiol level in postmenopausal breast cancer Metastasis-free survivals according to ER status. a. Metastasis-free survival was lower in ER-positive patients with higher than with lower estradiol level, although the difference was not statistically significant (Log-rank=0.25). b. In ER negative patients, higher estradiol levels were significantly associated with increased risk of metastasis (Log-rank=0.02).Back to article page