Table 2.

Percent glandular and Percentage of breast density associations. The percent glandular (PG) and percent density (PD) findings are presented in both unadjusted and adjusted for body mass index (BMI) quantities. The odds ratios (ORs) are shown by quartile with 95% confidence intervals (CIs). The number of case/control samples for each quartile is given in the third column. The area under the receiver operating characteristic curve (Az) and its standard error (SE) are also provided

Measure: PG Quartile	OR (95% CI)	cases/controls	Az (SE)
unadjusted			0.56 (0.02)
1	1.00 (Ref.)	17/27
2	1.89 (0.81 - 4.43)	30/26
3	2.01 (0.87 - 4.63)	33/27
4	1.73 (0.69 - 4.34)	26/26
BMI adjusted			0.62 (0.02)
1	1.00 (Ref.)	17/27
2	1.96 (0.82 - 4.72)	30/26
3	2.37 (0.99 - 5.62)	33/27
4	2.43 (0.92 - 6.49)	26/26
Measure: PD
unadjusted			0.61(0.02)
1	1.00 (Ref.)	10/26
2	2.39 (0.96 - 5.97)	26/27
3	3.78 (1.51 - 9.43)	39/27
4	3.12 (1.23 - 7.95)	31/26
BMI adjusted			0.68 (0.04)
1	1.00 (Ref.)	10/26
2	2.88 (1.09 - 7.57)	26/27
3	4.81 (1.82 - 12.67)	39/27
4	5.09 (1.73 - 15.02)	31/26