Table 1

Patient and tumor characteristics (n = 210)

Factor

Node-negative Node-positive

P value

# of sample

(n = 94)

(n = 116)

Age (yr)

210

55.8 ± 12.4

51.7 ± 13.3

0.020

Age groups (yr)

≤49

79

31 (33.0%)

48 (41.4%)

0.211

≥50

131

63 (67.0%)

68 (58.6%)

Tumor size (mm)

Tmicro

3

3 (3.2%)

0

0.001

T1a

6

3 (3.2%)

3 (2.6%)

T1b

23

13 (14.0%)

10 (8.7%)

T1c

54

33 (35.5%)

21 (18.3%)

T2

99

37 (39.8%)

62 (53.9%)

T3

13

4 (4.3%)

9 (7.8%)

T4

10

0

10 (8.7%

Histologic grade

1

43

19 (20.2%)

24 (20.7%)

0.091

2

69

37 (39.4%)

32 (27.6%)

3

86

31 (33.0%)

55 (47.4%)

Unknown

12

7 (7.4%)

5 (4.3%)

Lymphovascular invasion

Negative

100

75 (79.8%)

25 (21.6%)

<0.001

Positive

105

16 (17.0%)

89 (76.7%)

Unknown

5

3 (3.2%)

2 (1.7%)

Perineural invasion

Negative

133

69 (73.4%)

64 (55.2%)

0.003

Positive

72

22 (23.4%)

50 (43.1%)

Unknown

5

3 (3.2%)

2 (1.7%)

Multicentricity

Negative

153

75 (79.8%)

78 (67.2%)

0.300

Positive

56

18 (19.1%)

38 (32.8%)

Unknown

1

1 (1.1%)

0

In situ carcinoma

Negative

46

29 (30.9%)

17 (14.7%)

0.005

Positive

159

63 (67.0%)

96 (82.8%)

Unknown

5

2 (2.1%)

3 (2.5%)

Microcalcification

Negative

136

66 (70.2%)

70 (60.3%)

0.087

Positive

67

24 (25.5%)

43 (37.1%)

Unknown

7

4 (4.3%)

3 (2.6%)

Epithelial hyperplasia

Negative

104

57 (60.6%)

47 (40.5%)

0.002

Positive

96

32 (34.0%)

64 (55.2%)

Unknown

10

5 (5.4%)

5 (4.3%)

Yenidunya et al. Diagnostic Pathology 2011 6:18   doi:10.1186/1746-1596-6-18