Supplementary Table 1.
Baseline characteristics of the study population after propensity score matching
| Characteristic | Total | ED | P | |
|---|---|---|---|---|
|
| ||||
| No | Yes | |||
| Patients, n (%) | 1726 | 863 (50.00) | 863 (50.00) | |
| Age (year), mean (s.e.) | 58.24 (0.5) | 55.55 (0.5) | 61.50 (0.6) | <0.0001 |
| Race, n (%) | 0.24 | |||
| Caucasian | 997 (57.8) | 474 (76.0) | 523 (79.7) | |
| African American | 248 (14.4) | 129 (8.4) | 119 (7.4) | |
| Others | 481 (27.9) | 260 (15.6) | 221 (12.9) | |
| Marital status, n (%) | 0.8 | |||
| Married/living with a partner | 1312 (76.0) | 657 (77.8) | 655 (78.5) | |
| Single/divorced/widowed | 414 (24.0) | 206 (22.2) | 208 (21.5) | |
| Education level, n (%) | 0.06 | |||
| Less than high school | 609 (35.3) | 277 (20.3) | 332 (27.9) | |
| High school or equivalent | 391 (22.7) | 210 (27.3) | 181 (24.5) | |
| College or above | 726 (42.1) | 376 (52.4) | 350 (47.6) | |
| BMI (kg m−2), n (%) | 0.93 | |||
| <30.00 | 1160 (67.2) | 573 (63.1) | 587 (62.7) | |
| ≥30.00 | 566 (32.8) | 290 (37.0) | 276 (37.3) | |
| PIR, n (%) | 0.05 | |||
| ≤1.30 | 411 (23.8) | 194 (16.7) | 217 (16.7) | |
| 1.31–3.50 | 733 (42.5) | 344 (36.2) | 389 (43.7) | |
| >3.50 | 582 (33.7) | 325 (47.1) | 257 (39.6) | |
| Smoking status, n (%) | 0.1 | |||
| Never | 534 (30.9) | 275 (31.0) | 259 (29.8) | |
| Former | 781 (45.3) | 348 (41.1) | 433 (48.1) | |
| Now | 411 (23.8) | 240 (27.9) | 171 (22.2) | |
| Drinking status, n (%) | 0.18 | |||
| Never | 104 (6.0) | 45 (6.7) | 59 (7.2) | |
| Former | 509 (29.5) | 227 (24.1) | 282 (30.2) | |
| Now | 1113 (64.5) | 591 (69.2) | 522 (62.7) | |
| Recreational activity, n (%) | 0.4 | |||
| Vigorous | 318 (18.4) | 170 (22.1) | 148 (18.2) | |
| Moderate | 596 (34.5) | 301 (37.7) | 295 (39.6) | |
| Inactivity | 812 (47.1) | 392 (40.2) | 420 (42.2) | |
| Hypercholesterolemia, n (%) | 0.46 | |||
| No | 915 (53.0) | 464 (50.1) | 451 (47.4) | |
| Yes | 811 (47.0) | 399 (49.9) | 412 (52.6) | |
| CVD, n (%) | 0.002 | |||
| No | 1316 (76.3) | 716 (82.9) | 600 (71.2) | |
| Yes | 410 (23.8) | 147 (17.1) | 263 (28.8) | |
| Hypertension, n (%) | 0.01 | |||
| No | 747 (43.3) | 426 (48.6) | 321 (41.3) | |
| Yes | 979 (56.7) | 437 (51.4) | 542 (58.7) | |
| Diabetes, n (%) | 0.004 | |||
| No | 1304 (75.6) | 693 (81.0) | 611 (71.9) | |
| Yes | 422 (24.5) | 170 (19.0) | 252 (28.1) | |
| Testosterone, n (%) | 0.25 | |||
| Low | 70 (4.1) | 31 (3.4) | 39 (4.6) | |
| Normal | 224 (13.0) | 126 (14.3) | 98 (11.8) | |
| Unknown | 1432 (83.0) | 706 (82.4) | 726 (83.7) | |
| Total energy (kcal), mean (s.e.) | 2183.98 (27.8) | 2239.09 (40.5) | 2116.81 (43.1) | 0.06 |
| Dietary niacin (mg), mean (s.e.) | 24.53 (0.3) | 25.49 (0.4) | 23.37 (0.5) | 0.002 |
BMI: body mass index; PIR: poverty income ratio; CVD: cardiovascular disease; s.e.: standard error; ED: erectile dysfunction