Kaplan-Meier survival curves for miR-9.

<p>Solid lines represent LR-free survival curves of breast cancer patients who had miR-9 low expression tumors in validation sample set, all cases (panel A) and ER positive cases (panel B). Dotted lines represent the patients who hadmiR-9 high expression tumors. P values are 0.08 and 0.02 for all cases (panel A) and ER positive cases (panel B), respectively.</p

Association of miR-9 and miR-375 expression levels with tumor estrogen receptor (ER) status.

<p>Delta Ct values of miR-9 (panel A) and miR-375 (panel B) are compared between patients who had ER negative (ER status  = 0) and ER positive (ER status  = 1) tumors. A high delta Ct value indicates a low expression level. The capabilities of miR-9 and miR-375 to discriminate ER status are shown in ROC curves (panel C and D, respectively).</p

Association of miR-9 and miR-375 with selected patient characteristics.

*<p><i>P</i> values were based on Wilcoxon rank sum test (continuous variables) or Fisher’s exact test (categorical variables) ∧estrogen receptor.</p