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Table 1 Characteristics of BIRADS 4 cohort, all ages, N= 464 a

From: The use of the Gail model, body mass index and SNPs to predict breast cancer among women with abnormal (BI-RADS 4) mammograms

Characteristics Data
Age, yr, mean ± SD (range) 48.7 ± 13.2 (20 to 86)
Age, yr, categories   
  <35 73 15.7
  35 to 40 41 8.8
  40 to 49 114 24.6
  50 to 59 146 31.5
  60+ 90 19.4
Race/ethnicity   
  White 277 59.7
  African American/black 145 31.3
  Hispanic 9 1.9
  Asian 16 3.5
  Other 17 3.7
Age at menarche, yr   
  <11 90 19.4
  12 to 13 200 43.1
  ≥14 107 23.1
  Unknown 67 14.4
Age at first live birth, yr   
  <20 69 14.9
  20 to 24 94 20.3
  25 to 29 76 16.4
  ≥30 80 17.2
  Nulliparous 139 30
  Missing data 6 1.3
First-degree relatives with breast or ovarian cancer, n  
  0 350 75.4
  1 101 21.8
  >1 13 2.8
Prior breast biopsy, n   
  0 266 57.3
  1 123 26.5
  >1 75 16.2
Prior AH   
  Yes 20 4.3
  No 444 95.7
Gail 5-yr risk estimate, mean ± SD 1.54 ± 1.43
Gail 5-yr risk estimate, %   
  <1.67 309 66.6
  ≥1.67 155 33.4
Body mass index, kg/m2   
  <25 182 39.2
  25 to 29.9 95 20.5
  ≥30 108 23.3
  Missing data 79 17.0
deCODE genetics panel RR, mean ± SD 1.22 ± 0.44
  <1.00 163 35.1
  1.01 to 1.49 182 39.2
  ≥1.50 119 25.7
Outcome of biopsy   
  Benign 366 78.9
  AH/LCIS 24 5.2
  DCIS 33 7.1
  Invasive carcinoma 41 8.8
  1. aAH, Atypical hyperplasia; BI-RADS, Breast Imaging-Reporting and Data System; DCIS, Ductal carcinoma in situ; LCIS, Lobular carcinoma in situ; RR, Relative risk; SD, Standard deviation. Data are number and percent unless otherwise stated.