Table 1 Background of participants.

	All n = 398	Non-ED group n = 66	ED group n = 332	P value
Age, years	53 (38–65)	36 (32–44)	57 (43–66)	< 0.001
Body mass index, kg/m²	23 (22–26)	23 (21–25)	23 (22–26)	0.759
Hypertension	167 (42%)	13 (20%)	154 (46%)	< 0.001
Dyslipidemia	128 (32%)	14 (21%)	114 (34%)	0.037
Diabetes mellitus	41 (10%)	2 (3.0%)	39 (12%)	0.043
Smoking status				0.448
Never	154 (39%)	30 (45%)	124 (37%)
Former	130 (33%)	20 (30%)	110 (33%)
Current	114 (29%)	16 (24%)	98 (30%)
Current habitual drinking	268 (67%)	44 (67%)	224 (68%)	0.899
Post-high school education	108 (27%)	27 (41%)	81 (24%)	0.006
Medications
β-blockers	10 (2.5%)	1 (1.5%)	9 (2.7%)	1.000
Calcium-blockers	45 (11%)	2 (3.0%)	43 (13%)	0.018
Thiazide diuretics	10 (2.5%)	0 (0.0%)	10 (3.0%)	0.380
SF-36 MCS	51 (45–56)	49 (44–56)	51 (45–56)	0.298
Laboratory blood test
eGFR, mL/min/1.73m²	81 (72–89)	84 (76–94)	81 (71–88)	0.013
Total cholesterol, mg/dL	203 (179–225)	201 (174–219)	205 (180–225)	0.176
LDL-cholesterol, mg/dL	116 (95–132)	111 (90–123)	116 (96–134)	0.055
Triglyceride, mg/dL	97 (68–148)	98 (54–162)	97 (71–147)	0.351
Ankle-brachial index	1.1 (1.1–1.2)	1.1 (1.1–1.2)	1.1 (1.1–1.2)	0.271
baPWV	1460 (1278–1721)	1293 (1185–1418)	1499 (1314–1791)	< 0.001
IIEF-5 score	17 (12–20)	23 (22–24)	15 (11–19)	< 0.001

All data are presented as n (%) or medians (interquartile ranges).
ED erectile dysfunction, SF-36 MCS 36-Item Short Form Health Survey Mental Component Summary, eGFR estimated glomerular filtration rate, LDL low density lipoprotein, baPWV brachial-ankle pulse wave velocity, IIEF International Index of Erectile Function.

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