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Table 2 Subset of subjects with ≥ 1% epithelium or ≥ 1% stroma in both dense and non-dense cores

From: Tissue-based associations of mammographic breast density with breast stem cell markers

Marker expression measure Dense Non-dense P for difference*
Number Mean (STD) Number Mean (STD)
CD44
 Staining extent 59 6.3 (6.7) 59 2.0 (4.2) <0.001
 Expression score (extent x intensity) 59 9.8 (11.3) 59 3.3 (9.1) <0.001
CD24
 Staining extent 27 8.0 (6.0) 27 5.6 (5.8) 0.10
 Expression score (extent x intensity) 27 11.1 (8.6) 27 8.5 (11.5) 0.40
ALDH1A1
 Staining extent 10 0.5 (0) 10 0.3 (0.3) 0.12
 Expression score (extent x intensity) 10 0.8 (0.3) 10 0.4 (0.3) 0.06
  1. STD standard deviation, ALDH1A1 aldehyde dehydrogenase family 1 member A1
  2. *P value from signed rank test for alternative hypothesis of associations vs. null hypothesis of no association with significance level of 0.05