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Table 2 Breast cancer-specific survival according to primary tumor diameter

From: Long-term prognosis of breast cancer detected by mammography screening or other methods

  Screening Outside screening   
Primary tumor diameter (mm) At risk (n) 15-year survival (%) At risk (n) 15-year survival (%) Pvalue RR
All age groups       
   ≤ 10 132 92.1 116 83.9 0.0296 2.04
   11 to 20 133 84 297 74.5 0.0066 1.75
   21 to 50 37 76.6 214 56.5 0.0088 2.08
   > 50 N.A. N.A. 19 34.1 N.A. N.A.
Ages 50 to 69 years       
   ≤ 10 122 92.1 54 83.1 0.0343 2.25
   11 to 20 110 81.5 123 74.6 0.0764 1.52
   21 to 50 30 77.7 89 59.4 0.0325 1.02
   > 50 N.A. N.A. 5 35.7 N.A. N.A.
Node-negative ages 50 to 69 years       
   ≤ 10 114 93.7 48 84 0.021 2.66
   11 to 20 84 87 89 79.3 0.0534 1.85
   21 to 50 19 90.7 58 70.9 0.0769 2.79
   > 50 N.A. N.A. 2 50 N.A. N.A.
  1. N.A. = data not available because screen-detected tumors were rarely > 50 mm; RR = risk ratio.