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Table 2 Cumulative incidence of in-breast recurrences (IBR) and Kaplan-Meier estimates of overall survival (OS)

From: Role of postoperative radiotherapy in reducing ipsilateral recurrence in DCIS: an observational study of 1048 cases

  IBR OS  
  5 y (%) 10 y (%) p 5 y (%) 10 y (%) p
Age at diagnosis (years)
  < 50 12.6 17.6 0.251 100.0 98.5 < 0.001
 50–69 9.7 16.4   98.2 95.1  
  ≥ 70 7.0 13.8   88.1 74.6  
Tumour localisation
 Left 9.4 14.8 0.134 97.0 93.0 0.830
 Right 11.0 18.3   97.6 93.8  
Tumour size
  < 25 mm 12.6 17.5 0.274 96.7 94.9 0.225
  ≥ 25 mm 6.7 6.7   88.9 84.2  
Grade
 G1 12.0 22.4 0.212 93.3 93.3 0.444
 G2 5.3 12.4   96.6 95.3  
 G3 11.7 15.9   99.4 90.7  
Multifocality
 no 10.0 16.2 0.592 97.3 93.4 0.972
 yes 11.1 19.4   97.6 93.1  
Resection margins
 R0 9.3 15.6 0.526 97.6 93.1 0.953
 R1–2 14.8 20.2   96.2 96.2  
Hormone receptor status
 positive 8.6 16.2 0.719 97.2 94.3 0.501
 negative 13.0 15.6   97.6 90.1  
Radiotherapy
 no 13.2 20.0 0.012 95.1 90.0 0.001
 yes 8.0 13.6   99.1 96.7  
Endocrine therapy
 no 10.9 17.4 0.111 97.2 93.6 0.319
 yes 5.5 10.7   97.6 92.3