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Table 2 Rates of breast cancer relapse and hazard ratios related to dose intensity of chemotherapy

From: Radiation impact in breast cancer

Subset Dose intensity of chemotherapy No radiation (%) Radiation (%) Hazard ratio (DFS)
Arriagada and colleagues [20]
   Node-negative 0.0 59 47 0.70
   Node-positive   82 67 0.65
Overgaard and colleagues [2]
   N1 to N3 0.4 53 37 0.61
   N4+   76 60 0.64
Ragaz and colleagues [1]
   N1 to N3 0.6 48 36 0.68
   N4+   83 62 0.55
  1. Absolute and relative rates of breast cancer relapse (%) and hazard ratios related to the dose intensity of chemotherapy. N1 to N3, one to three axillary nodes involved; (N4+), four or more axillary nodes involved. DFS, first event breast cancer recurrence (or any death).