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Table 1 Patient characteristics

From: The effects of postoperative radiotherapy on survival outcomes in patients under 65 with estrogen receptor positive tubular breast carcinoma

Variables n no-RT (%) RT (%) p
Age (years)
  < 50 682 112 (26.5) 570 (28.2) 0.512
  ≥ 50 1760 310 (73.5) 1450 (71.8)  
Race/ethnicity
 Non-Hispanic white 2098 357 (84.6) 1741 (86.2) 0.463
 Non-Hispanic black 103 21 (5.0) 82 (4.1)  
 Hispanic 133 28 (6.6) 105 (5.2)  
 Other 108 16 (3.8) 92 (4.6)  
Grade
 Well differentiated 2244 380 (90.0) 1864 (92.2) 0.012
 Moderately differentiated 176 33 (7.8) 143 (7.1)  
 Poorly/undifferentiated 22 9 (2.1) 13 (0.6)  
Tumor size
 T1mic 22 6 (1.4) 16 (0.8) 0.444
 T1a 662 122 (28.9) 540 (26.7)  
 T1b 1154 196 (46.4) 958 (47.4)  
 T1c 604 98 (23.2) 506 (25.0)  
PR status
 Negative 328 47 (11.1) 281 (13.9) 0.136
 Positive 2114 375 (88.9) 1739 (86.1)  
Chemotherapy
 No/unknown 2302 391 (92.7) 1911 (94.6) 0.134
 Yes 140 31 (7.3) 109 (5.4)  
  1. PR progesterone receptor, RT radiotherapy, T tumor