Figure 4From: Digital mammographic density and breast cancer risk: a case–control study of six alternative density assessment methodsBreast cancer risk by fifths of percent density for each quantitative method, and by BI-RADS categories. Fifths of percent density risk were defined by quintiles of the density distributions among controls. Pt, P for linear trend; OR, odds ratio; SXA, single energy x-ray absorptiometry.Back to article page