Table 2.

Relation between relative mitotic rate (MIB1 positive) of epithelial cells and connective tissue density

CT density	RMR	95% CI	p
TDLUs
Low	1.00
Medium	0.58	0.48–0.70	<0.001
High	0.59	0.53–0.66	<0.001
Ducts
Low	1.00
Medium	0.66	0.44–0.97	0.035
High	0.65	0.53–0.79	<0.001

CI, confidence interval; CT, connective tissue; RMR, relative mitotic rate; TDLUs, terminal duct lobular units.