Figure 1

Association between mammographic density and bone density in women who were not recent hormone therapy users. (a) Mammographic density by quartile of lumbar spine bone mineral density (BMD) in participants who were not recent hormone therapy users. Recent hormone users were defined as women who stopped taking hormone therapy to join the Postmenopausal Estrogen/Progestin Interventions Study (PEPI). Women who were not recent hormone therapy users were women who did not stop taking hormone therapy to join PEPI. (b) Mammographic density by quartile of total hip BMD in participants who were not recent hormone therapy users.