Table I. Characteristics of study cohort.
Categorical data shown as number of men (%). Percents of the row total are given for the varicocele groups; percents of the total N (709) are given in the total column. Continuous data shown as mean ± SD.
| Varicocele | No varicocele | Total | P Value | |
|---|---|---|---|---|
| Number of men | 56 (8) | 653 (92) | 709 | |
| Varicocele | ||||
| Left only | 42 (75) | |||
| Right only | 7 (12) | |||
| Bilateral | 7 (12) | |||
| Varicocele grade | ||||
| Palpable with Valsalva | 9 (14) | |||
| Palpable | 47 (75) | |||
| Visible | 7 (11) | |||
| Age (yr) | 33 ± 5 | 31 ± 6 | 32 ± 6 | 0.03 |
| BMI (kg/m2) | 28.8 ± 5.9 | 28.5 ± 5.3 | 28.6 ± 5.4 | 0.75 |
| Current smoker | 12 (8) | 133 (92) | 145 (21) | 0.88 |
| Center | ||||
| CA | 1 (1) | 178 (99) | 179 (25) | |
| MN | 23 (12) | 169 (88) | 192 (27) | |
| MO | 17 (9) | 180 (91) | 197 (28) | |
| NY | 8 (23) | 27 (77) | 35 (5) | |
| IA | 7 (7) | 99 (93) | 106 (15) | < 0.0001 |
| Race | ||||
| Hispanic/Latino | 4 (4) | 109 (96) | 113 (16) | |
| White | 46 (9) | 461 (91) | 507 (72) | |
| Black | 6 (11) | 49 (89) | 55 (8) | |
| Other | 0 (0) | 32 (100) | 32 (5) | 0.06 |
| Previous pregnancy | 33 (7) | 414 (93) | 447 (63) | 0.47 |
| Time to pregnancy (mos) | 5.3 ± 4.8 | 5.4 ± 4.8 | 5.4 ± 4.8 | 0.92 |
| Left testes volume (ml) | 19 ± 6 | 22 ± 7 | 22 ± 7 | 0.003 |
| Right testes volume (ml) | 22 ± 5 | 23 ± 6 | 23 ± 6 | 0.15 |