Figure 4.

Cause-specific hazard rate estimates for recurrence following IBTR diagnosis and surgical treatment in 157 patients undergoing mastectomy for IBTR with time to IBTR exceeding 2.5 years (time origin at surgery for IBTR) and in 581 N+ patients undergoing mastectomy for primary tumor removal (time origin at initial surgery). A. Hazard rate within a six month interval. Smoothed curves obtained by a Kernel-like smoothing procedure. B. One month basis hazard rate obtained by the formal regression approach described in the Methods section. Vertical lines represent 95% point-wise confidence interval