Table 1.

Descriptive statistics of KLK5 expression in breast tissues

			Quartiles
Variables	Mean ± SEa	Range	10	25	50 (median)	75	90
Cancer (N = 69)*
KLK5 (c/Kc)b	(1.67 ± 0.48) × 103	0.035-19.6 × 103	0.035	0.013	41.5	1129.3	5937.9
Non Cancer (N = 33)
KLK5 (c/Kc)b	(71.1 ± 44.7) × 103	0.035-1380.4 × 103	180.6	1264.3	4374.1	12320.5	74702.3

* Ductal histotype

^a Standard error

^b KLK5 mRNA copies/10³ HPRT1 mRNA copies normalized to the calibrator (BT20 breast cancer cell line)