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. 2012 Feb 14;106(6):1234–1238. doi: 10.1038/bjc.2012.31

Table 4. Age-specific incidence of TN breast cancer and impact on BRCA testing.

Age Total cases in Englanda Proportion that are TNb (%) TN cases per year Proportion not eligible for BRCA testing (%) Additional BRCA tests per year, if all TN tested
<40 Years 1765 29 512 69 353
<50 Years 7384 21 1551 77 1194
<60 Years 16156 17 2747 79 2170
All 38004 16 6081 84 5108

Abbreviation: TN=Triple-negative.

b

Extrapolated from the data in Blows et al (2010).