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Figure 4. Smoothed plots of frequency distributions of PPV3 for 14 374 diagnostic mammography examinations with abnormal results for which biopsy was recommended and actually performed (among radiologists with 10 or more biopsies performed), as a function of indication for examination. An overlaid solid line indicates the 50th percentile (median), paired dashed lines indicate the 25th and 75th percentiles, and paired dotted lines indicate the 10th and 90th percentiles. A, Work-up of abnormal results detected at screening examination; B, short-interval follow-up; C, evaluation of breast problem, no lump or lump unknown; D, evaluation of breast problem, palpable lump; E, all diagnostic examinations. Corresponding arithmetic mean values for all 18 076 examinations for which biopsy was performed are listed in Table 3.
