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Table 1 Basic characteristics of postmenopausal breast cancer cases and controls by race/ethnicity

From: Plasma 25-hydroxyvitamin D3 is associated with decreased risk of postmenopausal breast cancer in whites: a nested case–control study in the multiethnic cohort study

  White African-American Native Hawaiian Japanese Latino
(n = 294) (n = 212) (n = 136) (n = 508) (n = 264)
Cases Controls Cases Controls Cases Controls Cases Controls Cases Controls
  No. % No. % No. % No. % No. % No. % No. % No. % No. % No. %
Area                     
 Hawaii 137 93.2 137 93.2      68 100.0 68 100.0 215 84.6 215 84.6     
 LA 10 6.8 10 6.8 106 100.0 106 100.0      39 15.4 39 15.4 132 100.0 132 100.0
Season                     
 Oct-Mar 65 44.2 68 46.3 54 50.9 57 53.8 38 55.9 36 52.9 98 38.6 119 46.8 70 53.0 57 43.2
 Apr-Sep 82 55.8 79 53.7 52 49.1 49 46.2 30 44.1 32 47.1 156 61.4 135 53.2 62 47.0 75 56.8
Sunburn history 103 70.1 98 67.1 17 16.2 9 9.0 21 31.3 23 33.8 48 19.0 54 21.4 40 32.3 28 22.8
Family history of breast cancer 22 15.0 13 8.8 21 19.8 22 20.8 12 17.6 10 14.7 38 15.0 28 11.0 15 11.4 8 6.1
Use of multivitamins 82 56.6 73 50.3 59 56.7 56 55.4 36 52.9 33 49.3 135 53.4 126 50.0 63 48.8 69 52.7
Use of calcium supplements 68 47.9 62 43.4 29 29.9 38 36.9 18 26.5 28 43.1 114 45.8 139 55.6 52 42.3 48 38.4
  Mean SD Mean SD Mean SD Mean SD Mean SD Mean SD Mean SD Mean SD Mean SD Mean SD
Age 68.5 7.9 68.4 7.7 69.1 7.6 69.2 7.5 65.7 6.8 65.8 6.8 67.8 7.7 67.8 7.7 67.3 6.7 67.3 6.8
Body mass index (kg/m2) 25.0 4.5 24.5 5.4 28.0 5.0 28.4 5.7 27.8 5.5 28.1 6.2 24.2 4.2 23.3 3.8 28.2 5.7 27.3 5.6
Live births 2.3 1.6 2.7 1.6 2.9 1.8 2.9 2.0 3.5 2.0 3.5 1.7 2.2 1.4 2.3 1.4 3.5 2.0 4.1 2.0
Sports activity (hour/week) 0.2 0.3 0.2 0.5 0.1 0.3 0.1 0.2 0.2 0.7 0.2 0.4 0.1 0.3 0.1 0.2 0.1 0.4 0.1 0.4
Energy intake, Kcal/day 1,799 649 1,785 714 1,848 1,043 1,834 1,010 2,295 1,191 2,031 1,092 1,814 670 1,900 658 2,189 1,199 2,222 1,369
Vitamin D, IU/1000 Kcal/day 78 44 81 52 74 52 70 52 74 47 81 56 62 38 61 36 72 44 70 58
Calcium, mg/1000 Kcal/day 438 136 436 144 400 146 384 145 361 140 371 170 336 108 331 109 467 142 463 164
Phosphorus, mg/1000 Kcal/day 650 123 658 122 651 137 631 129 578 124 604 139 580 101 568 104 687 127 699 144
Plasma 25(OH)D2, ng/mLa 3.5 5.4 2.6 4.7 2.2 5.0 3.3 5.5 1.7 3.8 2.8 5.3 4.3 5.7 3.3 4.9 2.5 4.5 3.0 5.4
Plasma 25(OH)D3, ng/mLa 31.4 10.1 34.8 10.1 23.5 12.3 23.1 9.6 30.9 9.5 30.6 11.6 28.5 9.4 29.3 10.5 25.2 8.1 24.1 8.5
Plasma 25(OH)D, ng/mLa 34.9 10.2 37.4 9.7 25.7 12.1 26.4 11.3 32.6 8.7 33.4 12.2 32.7 9.3 32.6 10.2 27.7 9.4 27.1 9.4
  1. Abbreviation: SD standard deviation, 25(OH)D 2 25-hydroxyvitamin D2, 25(OH)D 3 25-hydroxyvitamin D3, 25(OH)D sum of 25(OH)D2 and 25(OH)D3.
  2. aMultiply 2.5 to convert the values to nmol/L.