Table 2

Multivariable linear regression estimates of percent density (%), dense area (cm2), and non-dense area (cm2), New York city multiethnic breast cancer project, 2007-2008
Characteristic β coefficient 95% CI P-value
Percent Density (%)
Serum 25(OH)D (ng/ml) −0.013 −0.188 0.161 0.880
Age at mammogram (years) −0.576 −0.921 −0.230 0.001
Race/ethnicity
  White Reference
  African American 1.762 −3.831 7.355 0.533
  African Caribbean 3.169 −3.274 9.613 0.332
  Hispanic/Other −2.094 −8.860 4.672 0.541
Education
  ≤High school −2.017 −7.157 3.123 0.438
  Some college/associate degree −3.646 −8.600 1.308 0.147
  Bachelor, master, doctoral degree Reference
Body mass index (kg/m2) −0.503 −0.873 −0.133 0.008
Ever breast feeding
  Yes 1.038 −3.015 5.091 0.612
  No Reference
Season of blood draw
  January-March Reference
  April-June 0.761 −3.983 5.505 0.751
  July-September −5.398 −11.259 0.462 0.071
  October-December −5.464 −16.201 5.274 0.315
Dense Area (cm2)
Serum 25(OH)D (ng/ml) −0.094 −0.332 0.143 0.432
Age at mammogram (years) −0.624 −1.101 −0.146 0.011
Race/ethnicity
  White Reference
  African American 5.421 −2.299 13.142 0.167
  African Caribbean 5.838 −2.899 14.576 0.188
  Hispanic/Other −2.643 −11.985 6.700 0.576
Education
  ≤High school −0.243 −7.254 6.767 0.945
  Some college/associate degree −3.547 −10.372 3.278 0.305
  Bachelor, master, doctoral degree Reference
Body mass index (kg/m2) −0.170 −0.680 0.341 0.511
Season of blood draw
  January-March Reference
  April-June 3.430 −3.128 9.988 0.302
  July-September −6.680 −14.763 1.403 0.104
  October-December −6.718 −21.564 8.128 0.371
Non-Dense Area (cm2)
Serum 25(OH)D (ng/ml) 0.209 −0.823 1.242 0.688
Age at mammogram (years) 3.346 1.302 5.390 0.002
Race/ethnicity
  White Reference
  African American 12.640 −20.455 45.735 0.533
  African Caribbean 6.186 −31.943 44.315 0.748
  Hispanic/Other −2.090 −42.125 37.946 0.918
Education
  ≤High school 22.854 −7.560 53.269 0.139
  Some college/associate degree 21.506 −7.809 50.821 0.149
  Bachelor, master, doctoral degree Reference
Body mass index (kg/m2) 7.142 4.952 9.331 <.001
Ever breast feeding
  Yes −17.582 −41.566 6.402 0.149
  No Reference
Season of blood draw
  January-March Reference
  April-June −0.074 −28.145 27.997 0.996
  July-September 23.080 −11.597 57.757 0.190
  October-December 8.404 −55.132 71.940 0.794

Crew et al.

Crew et al. Nutrition & Metabolism 2014 11:18   doi:10.1186/1743-7075-11-18

Open Data