Table 1. Clinical and laboratory characteristics of study participants.

Characteristics	Non-vasculogenic ED (N=79)	Vasculogenic ED (N=40)	P value
Age (years)	33.18±7.22	41.02±7.42	<0.01
FBG (mmol/L)	4.66±0.98	5.09±1.66	0.08
TC (mmol/L)	3.92±0.81	4.07±0.94	0.37
HDL (mmol/L)	1.14±0.28	1.13±0.21	0.78
LDL (mmol/L)	2.50±0.75	2.61±0.94	0.53
LH (mIU/mL)	4.75±2.48	4.39±2.10	0.43
E2 (pg/mL)	56.59±24.85	54.91±23.99	0.73
Hcy (μmol/L)	16.31±5.23	22.91±5.85	<0.01
Testosterone (ng/mL)	4.31±1.30	3.97±1.05	0.16
PRL (ng/mL), median (IQR)	12.99 (9.67–16.23)	15.13 (11.61–21.35)	0.09
TG (mmol/L), median (IQR)	0.95 (0.64–1.54)	0.99 (0.56–1.39)	0.54
FSH (mIU/mL), median (IQR)	5.00 (3.49–6.80)	4.45 (2.68–5.81)	0.07
Progesterone (ng/mL), median (IQR)	0.87 (0.61–1.17)	0.85 (0.57–1.09)	0.58
HHcy			<0.01
No	48 (60.76%)	5 (12.50%)
Yes	31 (39.24%)	35 (87.50%)
Trauma			0.51
No	67 (84.81%)	32 (80.00%)
Yes	12 (15.19%)	8 (20.00%)
Hypertension (%)			<0.01
No	69 (87.34%)	24 (60%)
Yes	10 (12.66%)	16 (40%)
Smoking (%)			0.64
No	54 (68.35%)	29 (72.50%)
Yes	25 (31.65%)	11 (27.50%)

ED, erectile dysfunction; E2, estradiol; FBG, fasting blood glucose; FSH, follicle-stimulating hormone; Hcy, homocysteine; HHcy, hyperhomocysteinaemia; HDL, high-density lipoprotein; LDL, low-density lipoprotein; LH, luteinizing hormone; PRL, prolactine; IQR, interquartile range; TG, triglycerides; TC, total cholesterol.