Table 1.

Definitions of Mammography Capacity

Variable	Definition	Assumptions
No access within 1 hour	No mammography machines within a 1 hour drive from population-weighted block group centroid	N/A
Inadequate capacity	≤0.674 machines/10,000 women	Biennial screening of 81% of women aged 40+
Poor capacity	No access within 1 hour or inadequate capacity	Same as above
Adequate capacity	>0.674 machines/10,000 women	Same as above
Excess capacity	≥1.917 machines/10,000 women	Annual screening of 100% of women aged 40+, plus 15% recalled for further evaluation