Table 1.
Study Group | ||
---|---|---|
Characteristic | False-Positive Mammogram (n = 496) | Normal Mammogram (n = 496) |
Age*, y | 50.2 | 52.4† |
Current or previous estrogen use, % | 21.6 | 20.2 |
Previous breast symptom, % | 12.7 | 7.9† |
History of breast biopsy, % | 6.5 | 2.2† |
Positive family history of breast cancer, % | 24.4 | 19.2† |
Number of previous mammograms, per year‡ | 0.24 | 0.29† |
Recommended follow-up to mammogram, %§ | ||
Additional mammographic views | 16.8 | |
Follow-up mammography in 6 months | 41.1 | |
Ultrasound | 24.0 | |
Biopsy | 18.2 |
Age as of 7/1/83.
P < .05.
The ratio of number of screening mammograms between 7/1/83 and the index mammogram date, divided by observation time (in years) between those two dates.
Of those for which specific recommendations were available from radiology report (n = 380).