Figure 4

The figure shows the cumulative breast-cancer-free survival after study entry in women with and without the IGF1 19-repeat allele. The difference between the two groups was significant (log-rank P=0.002). Follow-up was censored at the time of prophylactic mastectomy without detection of breast cancer or on March 31, 2003. Please note the broken Y-axis. The number of women at each time point is indicated.