Table 1. Correlation of CDK5 expression with breast tumor subtypes.

Tumor type	Total No. of cases	No. with High-level Expression for CDK5	Percentage with high CDK5 expression	P value
ER+	72	10	13.9
ER-	36	22	61.1	8.42E-07
Luminal-ER+	72	10	15.6
HER2	20	12	60.0	0.000081
Basal-like	16	10	62.5	0.000153
Grade I/II	66	4	6.06
Grade III	42	28	66.7	1.47E-11