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Table 1 Clinicopathological characteristics of younger (<35) and older age groups

From: Young age: an independent risk factor for disease-free survival in women with operable breast cancer

Characteristics Age <35 (%) (n = 256) Age ≥ 35 (%) (n = 1784) P value
Age    
20–25 9 (3.5)   
26–30 56 (21.9)   
31–35 191 (74.6)   
36–40   318 (17.8)  
41–50   791 (44.3)  
51–60   474 (26.6)  
60–70   165 (9.2)  
71-   36 (2.0)  
Family historya 22 (8.7) 135 (7.6) 0.511
Histology    
Ductal 238 (93.0) 1624 (91.0)  
Lobular 2 (0.8) 30 (1.7)  
Medullary 10 (3.9) 29 (1.6) 0.018
others 6 (2.3) 101 (5.7)  
T stage    
T1 99 (38.7) 770 (43.2)  
T2 129 (50.4) 855 (47.9)  
T3–4 28 (10.9) 159 (8.9) 0.126
Lymph node metastasis    
Negative 138 (53.9) 1063 (59.6)  
Positive 118 (46.1) 721 (40.4) 0.084
Histological grade    
1–2 78 (58.6) 525 (60.0)  
3 55 (41.4) 350 (40.0) 0.767
Nuclear grade    
1–2 113 (52.6) 901 (61.3)  
3 102 (47.4) 570 (38.7) 0.015
ER    
Positive 97 (47.1) 907 (51.8)  
Negative 109 (52.9) 843 (48.2) 0.198
PR    
Positive 73 (36.7) 708 (43.5)  
Negative 126 (63.3) 921 (56.5) 0.068
c-erbB2    
Negative 94 (52.8) 647 (46.4)  
Positive 84 (47.2) 748 (53.6) 0.106
  1. aPatients who have 1st or 2nd degree relatives with breast cancer