Table 7.

Correlation of 1100 breast cancer cases according to age, tumor diameter, percentages of estrogen and progestrone receptors, and Ki-67 protein level

	Age	Tumor diameter	ER (%)	PgR (%)	Ki-67 protein
Age	1	.030	.170**	.112**	-.179**
Tumor diameter	.030	1	-.095*	-.036	-.022
ER (%)	.170**	-.095*	1	.639 **	-.505 **
PgR (%)	.112**	-.036	.639**	1	-.380 **
Ki-67 protein	-.179**	-.022	-.505**	-.380**	1

^*Correlation is significant at the 0.05 level (2-tailed).

^**Correlation is significant at the 0.01 level (2-tailed).

ER: Estrogen Receptor; PgR: Progesterone Receptor.