Prognostic value of the G2I on independent data set. (A) Scatter plot of 168 breast cancers from which BAC array CGH data were available  according to the two items and the previously defined thresholds of the G2I. M+: metastatic relapse; M-: absence of local or metastatic relapses after five years of follow-up. (B): Kaplan Meier curves showing metastasis-free survival at 10 years for the three G2I classes. Green: G2I-1, blue: G2I-2, red: G2I3; the number of tumors in each G2I class is given in parenthesis. HR: hazard ratio (log-rank test).