Table 1. Comparison of baseline parameters between control and BPH patients.

Variable	Control (n=22)	BPH (n=45)	p-value
Age (y)	64.2±5.5	66.1±8.2	0.48
PSA (ng/dL)	1.5±0.6	5.7±7.4	0.06
Serum hormone concentration
Estradiol (pg/dL)	22.4±8.8	27.9±11.1	0.13
Testosterone (ng/dL)	394.8±193.8	350.6±129.0	0.37
Estradiol/testosterone ratio	0.08±0.07	0.1±0.05	0.25
Prostate size (g)	19.4±4.8	46.1±15.5	<0.001
Baseline urine flow
PVR (mL)	10.5±15.5	121.0±113.6	0.004
Qmax (mL/s)	15.9±3.9	7.7±3.3	<0.001

Values are presented as mean±standard deviation.

BPH, benign prostatic hyperplasia; PSA, prostate-specific antigen; Qmax, maximal flow rate.