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Table 1 Characteristics of women with lobular carcinoma in situ (LCIS) in the SEER by race and ethnicity, 1990 to 2015 (n = 18,835)

From: Associations of race and ethnicity with risk of developing invasive breast cancer after lobular carcinoma in situ

 

White

Black

Asian

Hispanic

Number of cases

14,811

1536

865

1623

Age at diagnosis, %

 Mean (SD)

54.7 (10.6)

53.3 (10.7)

51.0 (9.7)

51.5 (9.6)

 20–39

3.3

5.7

6.2

5.3

 40–49

32.9

34.8

45.4

44.4

 50–59

35.3

34.1

31.7

31.0

 60–69

17.7

16.8

11.2

13.7

 ≥ 70

10.8

8.6

5.4

5.6

Length of follow-up, %

 Median (range), months

95 (6–311)

80 (6–309)

74 (6–310)

77 (6–311)

 6–11 months

4.2

5.5

6.1

6.2

 12–59 months

27.3

32.7

35.1

33.8

 60–119 months

30.2

30.4

30.5

30.6

 ≥ 120 months

38.3

31.5

28.2

29.4

Year of the first LCIS diagnosis, %

 1990–1999

19.2

16.3

12.5

13.8

 2000–2009

53.2

47.5

46.8

48.1

 2010–2015

27.7

36.3

40.7

38.1

Treatment

 No surgery

10.0

11.4

8.3

8.9

 BCS alone

82.7

82.4

86.0

84.7

 BCS and radiation

1.4

1.2

1.9

2.0

 Mastectomy

4.5

3.5

2.8

3.2

 Unknown

1.4

1.6

1.0

1.1

  1. Abbreviations: SD standard deviation, BCS breast-conserving surgery, ER estrogen receptor, PR progesterone receptor
  2. Race and ethnicity were classified into mutually exclusive categories of non-Hispanic white (hereafter referred to as white), non-Hispanic black (black), non-Hispanic Asian (Asian), and Hispanic (Hispanic)