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Table 2 Demographic, personal and lifestyle characteristics among 1,641 Caucasian breast cancer cases and controls, Mayo Clinic 2001 to 2005

From: Genetic variation in stromal proteins decorin and lumican with breast cancer: investigations in two case-control studies

   Cases (n = 798) Controls (n = 843)
Characteristic Level n %a n %
Age (years) 20 to 39 56 7 48 6
  40 to 49 192 24 166 20
  50 to 59 224 28 274 32
  60 to 69 195 24 207 25
  70+ 131 16 148 18
State of residence Minnesota 502 63 552 66
  Wisconsin 69 9 78 9
  Iowa 128 16 147 17
  North Dakota/South Dakota 52 6 41 5
  Illinois 47 6 25 3
Body mass index (kg/m2) Mean (standard deviation) 28 8 27 8
Family historyb Yes 366 47 345 43
Postmenopausal status Yes 480 64 579 72
Age at menarche (years) <12 132 18 122 16
  12 224 31 184 24
  13 218 30 238 32
  ≥ 14 154 21 209 28
Oral contraceptive use 0 months 266 35 243 31
  1 to 48 months 185 24 189 24
  48+ months 310 41 345 44
Postmenopausal hormone use 0 months 430 58 366 49
  1 to 60 months 131 18 160 22
  60+ months 184 25 216 29
Age at first birth (years) Nulliparous 97 13 128 16
  ≤ 20 years 173 22 158 20
  >20 years 501 65 514 64
Smoking (pack years) None 467 63 500 66
  ≤ 4 years 46 6 67 9
  >4 years 231 31 192 25
Alcohol consumption Never 92 12 94 12
  Monthly 332 43 327 41
  Weekly 259 34 299 37
  Daily 83 11 79 10
  1. aPercentages may not total 100 due to missing data. bFamily history in first-degree or second-degree relative with breast cancer or ovarian cancer.