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Table 1 Characteristics of the population and differences among controls (M0) and women affected by peritoneal carcinomatosis (M1: peritoneum) or other site of metastases (M1: other than peritoneum)

From: Prevalence, risk factors, and prognosis of peritoneal metastasis from breast cancer

 

M0

M1

M1

p

Other than peritoneum

Peritoneum

Age at diagnosis (years)

60.19 (± 12.92)

60.07 (± 14.2)

56.59 (± 12.52)

NS

BMI (kg/m2)

25.89 (± 4.9)

25.86 (± 5.11)

22.42 (± 4.97)

(2, 3)

Tobacco smoke

7.5 % (168/2230)

4.3 % (9/208)

0 % (0/19)

NS

Familial history of breast cancer

36 % (283/787)

33.9 % (21/62)

50 % (1/2)

NS

Use of OC

29.7 % (156/525)

24.5 % (12/49)

0 % (0/2)

NS

Post-menopausal status

79.6 % (2110/2652)

78.1 % (196/251)

70 % (14/20)

NS

First breast surgical treatment

 Breast conserving surgery

62.9 % (1767/2807)

33.7 % (90/267)

54.5 % (12/22)

(1, 3)

 Mastectomy

37.1 % (1040/2807)

66.3 % (177/267)

45.5 % (10/22)

(1, 3)

Axilla surgical treatment

 CALND

53.8 % (1511/2807)

90.3 % (241/267)

86.4 % (19/22)

(1,2)

 SLNB

42.5 % (1194/2807)

5.6 % (15/267)

9.1 % (2/22)

(1, 2)

 None

3.6 % (102/2807)

4.1 % (11/267)

4.5 % (1/22)

NS

Second breast surgical treatment

 None

77 % (1285/1669)

65.9 % (54/82)

81.8 % (9/11)

(1)

 Breast conservative surgery

10.7 % (178/1669)

14.6 % (12/82)

0 % (0/11)

NS

 Mastectomy

12.3 % (206/1669)

19.5 % (16/82)

18.2 % (2/11)

NS

Other treatments

 Neoadjuvant

5.6 % (158/2807)

15.7 % (42/267)

9.1 % (2/22)

(1)

 Adjuvant radiotherapy

58 % (1561/2690)

47.8 % (121/253)

50 % (11/22)

(1)

 Adjuvant chemotherapy

39.1 % (1051/2687)

82.9 % (208/251)

86.4 % (19/22)

(1, 2)

 Adjuvant hormonal therapy

79.7 % (2140/2684)

64.5 % (162/251)

72.7 % (16/22)

(1)

  1. Significant differences (p < 0.05) between: (1) M0 vs M1: other than peritoneum; (2) M0 vs M1: peritoneum; (3) M1: other than peritoneum vs M1: peritoneum
  2. NS non significant