Keywords:
Breast, Mammography, Digital radiography
Authors:
Y. Y. Lim, R. Borgen, S. Gadde, S. Bundred, E. Hurley; Manchester/UK
DOI:
10.1594/ecr2010/C-0298
Results
There were in total 1342 patients in the screen-film mammography (SFM) group and 1978 patients in the digital mammography (DM) group. Some patients were excluded due to missing data. Therefore, the number of patients included in this study was 1178 in the SFM group and 1916 in the DM group.
The recall rate in the DM group was higher at 8.7% as compared to 5.8% in the SFM group. 22.8% of the patients recalled in the DM group were in the prevalent screening round whereas 21.7% patients recalled in the SFM group were in the prevalent screening round.
There was no difference in the cancer detection rates in the DM and SFM groups at approximately 4.2 per 1000 patients. 6 out of the 8 patients with cancer in the DM group had invasive carcinoma whereas 4 out of the 5 patients with cancer in the SFM group had invasive carcinoma.
The overall needle sampling rates which include both FNA cytology and core biopsies were similar in both groups. The DM group had an overall needle sampling rate of 1.35% whereas SFM group had an overall needle sampling rate of 1%. Amongst the patients recalled for further assessment, the needle sampling rates were similar at 17% in the DM group compared to 16% in the SFM group.