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. Author manuscript; available in PMC: 2011 Jul 29.
Published in final edited form as: J Natl Cancer Inst. 2003 Sep 17;95(18):1384–1393. doi: 10.1093/jnci/djg048

Fig. 2.

Fig. 2

Differences in the percentage of mammograms judged to be abnormal between North American screening programs and programs from other countries, after adjustment for patient population and program characteristics. Differences in the percentages were calculated as the percentage in North American programs minus the percentage in programs from other countries. The difference in the percentage of mammograms judged to be abnormal between North American screening programs and programs from other counties remained between 2.0% and 3.9%, even after adjustment for the percentage of women less than 50 years old, reported calendar year in which the mammogram was performed, single or double mammography readers, and number of mammography views per breast.