Table 2.
Group Differences on Demographics and Cardiovascular Risk Factors Between Erectile Dysfunction (ED) and Non-Erectile Dysfunction (N-ED) Groups
| Variable | N-ED (n = 486) | ED (n = 165) | F | p |
|---|---|---|---|---|
| Mean (SE) age (years) | 55.4 (0.12) | 55.3 (0.12) | 2.8 | .1 |
| Mean (SE) education (years) | 14.0 (0.11) | 13.6 (0.16) | 3.4 | .07 |
| Mean (SE) AFQT score | 62.5 (1.1) | 59.2 (1.7) | 3.3 | .07 |
| Mean (SE) BMI | 28.6 (0.22) | 29.3 (0.33) | 3.7 | .06 |
| Mean (SE) depression score | 6.5 (0.32) | 7.8 (0.52) | 5.0 | .03 |
| Mean (SE) smoking (pack years) | 16.4 (1.1) | 21.4 (1.7) | 6.8 | .009 |
| Mean (SE) testosterone (pg/ml) | 104.4 (2.0) | 107.3 (3.1) | 0.7 | .39 |
| High cholesterol, n (%) | 102 (21.0) | 43 (26.1) | 2.0 | .16 |
| Hypertension, n (%) | 254 (52.2) | 88 (53.3) | 0.3 | .56 |
Note. AFQT = Armed Forces Qualification Test; BMI = body mass index. Results are Type III fixed effects and are controlled for correlated variance of twin data. AFQT serves as index of premorbid cognitive ability from age 20.