Table 3 Descriptive statistics of cytoplasmatic insulin receptor substrate 1 in all samples.

Cytoplasmic IRS‐1 expression (% of cases in class)
Class	Normal	Benign	Ductal	Lobular
0	0	0	0	0
1+	29	21	16	0
2+	29	21	52	63
3+	42	58	32	37

IRS‐1, insulin receptor substrate 1.

Samples are grouped into four classes as described in Materials and methods section. The percentage of specimens with cytoplasmic IRS‐1 in each staining category is given.