Table 2. The Spearman correlations of TGF-β1 protein, IGF peptide, and breast cancer characteristics.

Disease variable	Age	Tumour size	Lymph node	Grade	TNM stage	ER	PR	IGF-I peptide	Free-IGF-I peptide	IGF-II peptide	IGFBP-3 protein
TGF-β1 Protein	0.04	−0.03	0.01	−0.06	−0.14*	0.18**	0.05	0.13*	−0.04	0.33***	0.23***

^*P<0.05, ^**P<0.01, ^***P<0.001.