The USPSTF revised recommendations for women aged 39 to 49 years because the NNS of mammography increased to 1904 (1), a number that is usually unfavorable. The likely rationale was that risk–benefit ratio was too close to call, particularly on an individual patient basis. For women who attach great value to avoiding consequences of false-positive results (for example, biopsies and their potential complications or anxiety), harms may exceed benefits. However, for women who attach little value to avoiding these consequences, benefits may exceed harms. Accordingly, the USPSTF advised neither in favor of routine mammography (grades A or B) nor against it (grade D), but rather advised individualized decision making (grade C). However, because the USPSTF's rationale was implicit, it was misinterpreted. Many assumed the USPSTF was using NNS as a backdoor to rationing.