Liao GJ, et al. - Via a cohort study using National Ambulatory Medical Care Survey data for 2007 to 2015 for 12,787 preventive office visits for women aged 40 to 74 years without breast symptoms and signs or additional reasons needing ultrasound ordering, the researchers defined factors correlated with screening ultrasound ordering and discovered whether adoption of state-level breast density reporting laws was related to alterations in ordering rates. Overall, 28.9% (3,370 of 12,787) and 22.1% (2,442 of 12,787) of women underwent a breast examination and had a screening mammogram ordered, respectively. Only 3.3% (379 of 12,787) had an ordered screening ultrasound. For younger women, at urban practices, screening ultrasounds were ordered more commonly, and less commonly in practices with computer reminders for ordering screening tests. No change in the rate of ultrasound ordering following the adoption of density notification laws was noted. Hence, over time, the rate of screening ultrasound ordering persisted as low. Moreover, between the adoption of state-level density reporting laws and overall alterations in ultrasound ordering, no recognized relationships could be concluded.