Table 2.

Distribution of the proportion of stroma, epithelium and adipocytes in the dense and non-dense matched core biopsies of the breasts of 49 women

Cell type	Proportion of cells in Dense Core	Proportion of Cells in the Non-dense Core					P*
		<1%	1-25%	26-50%	51%+	76%+
Stroma	<1%	0	0	0	0		<0.001
	1-25%	2	1	0	1
	26-50%	1	3	2	1
	51%+	4	26	4	4
Epithelium	<1%	2	0	0	0		<0.001
	1-25%	18	12	0	0
	26-50%	9	7	1	0
	51%+	0	0	0	0
Adipocytes	<1%	0	0	0	1	2	<0.001
	1-25%	0	1	4	1	19
	26-50%	0	0	1	3	10
	51%-75%	0	0	1	1	3
	76%+	0	0	0	0	2

NOTE: Italicized numbers for stroma and epithelium reflect the women who have greater stroma and epithelium on dense core compared to non-dense core. Italicized numbers for adipocytes reflect greater proportion of cells on the non-dense vs. dense cores.

^*P-value from signed rank test examining the proportions of stroma, epithelium and adipocytes in the dense vs. non-dense cores.