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Table 4 Characteristics of MMTLV positive and negative breast cancer in Chinese women

From: Prevalence and characteristics of mouse mammary tumor virus-like virus associated breast cancer in China

Variables Number of MMTLV positive cases (%) Number of MMTLV negative cases (%) P-value a
Ages (years)    0.68
 <35 0 (0.00) 3 (3.06)  
 35–50 10 (47.62) 49 (50.00)  
 >50 11 (52.38) 46 (46.94)  
Sample source (province)    0.03
 Northern China 19 (90.48) 65 (66.33)  
 Southern China 2 (9.52) 33 (33.67)  
Histological type    0.61
 Invasive ductal carcinoma 20 (95.24) 87 (88.78)  
 Invasive lobular carcinoma 1 (4.76) 8 (8.16)  
 Mucious Adenocarcinoma 0 (0.00) 3 (3.06)  
Histological grade b    0.77
 GradeI 8 (38.10) 40 (46.51)  
 GradeII 11 (52.38) 38 (44.19)  
 GradeIII 2 (9.52) 8 (9.30)  
Lymph node involvement    0.21
 Positive 8 (38.10) 52 (53.06)  
 Negative 13 (61.90) 46 (46.94)  
Position    0.82
 Right 13 (61.90) 58 (59.18)  
 Left 8 (38.10) 40 (40.82)  
Estrogen receptor    0.73
 Positive 12 (57.14) 52 (53.06)  
 Negative 9 (42.86) 46 (46.94)  
Progesterone receptor    0.54
 Positive 12 (57.14) 63 (64.29)  
 Negative 9 (42.86) 35 (35.71)  
HER-2    0.02
 −/1+ 6 (28.57) 55 (56.12)  
 2+/3+ 15 (71.43) 43 (43.88)  
  1. a P value was calculated by χ2 or Fisher’s tests and was considered to be statistically significant for P<0.05. Bold values indicate significant correlation
  2. b Histological grade was performed only in specimens with invasive ductal carcinoma