Fig. 2

Distribution across categories of the overall and localized mammographic density of the 386 women with incident breast cancer for which local density assessment was performed. Category A is the least dense, and category D is the most dense. Marker placements within each rectangle carry no meaning; jittered for enhanced visibility. There is a moderate correlation between the two density parameters (r = 0.42). Percentage numbers show the proportion of cases within each overall density category