Table 2 Multivariable linear regression estimates of percent density (%), dense area (cm 2 ), and non-dense area (cm 2 ), New York city multiethnic breast cancer project, 2007-2008
From: Mammographic density and serum 25-hydroxyvitamin D levels
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 (cm 2 ) | ||||
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 (cm 2 ) | ||||
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 |