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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

 WhiteBlackAsianHispanic
Number of cases14,81115368651623
Age at diagnosis, %
 Mean (SD)54.7 (10.6)53.3 (10.7)51.0 (9.7)51.5 (9.6)
 20–393.35.76.25.3
 40–4932.934.845.444.4
 50–5935.334.131.731.0
 60–6917.716.811.213.7
 ≥ 7010.88.65.45.6
Length of follow-up, %
 Median (range), months95 (6–311)80 (6–309)74 (6–310)77 (6–311)
 6–11 months4.25.56.16.2
 12–59 months27.332.735.133.8
 60–119 months30.230.430.530.6
 ≥ 120 months38.331.528.229.4
Year of the first LCIS diagnosis, %
 1990–199919.216.312.513.8
 2000–200953.247.546.848.1
 2010–201527.736.340.738.1
Treatment
 No surgery10.011.48.38.9
 BCS alone82.782.486.084.7
 BCS and radiation1.41.21.92.0
 Mastectomy4.53.52.83.2
 Unknown1.41.61.01.1
  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)