Table 1.
Demographic categories by semen parametersa (n = 219).
| Semen parameter
|
||||
|---|---|---|---|---|
| Category | Comparison subjects (n = 73)b | Sperm concentration < 20 million/mL (n = 50) | Sperm < 50% motile (n = 74) | Sperm morphology < 4% normal (n = 97) |
| Age [years (mean ± SD)] | 34.2 ± 5.6 | 34.6 ± 6.0 | 35.1 ± 4.8 | 33.9 ± 5.8 |
| BMI (mean ± SD) | 28.7 ± 5.0 | 30.0 ± 6.6 | 29.6 ± 7.1 | 30.6 ± 6.8 |
| Race [no. (%)] | ||||
| White | 59 (81) | 37 (74) | 53 (72) | 68 (70) |
| Black | 11 (15) | 10 (20) | 11 (15) | 16 (16) |
| Other | 3 (4) | 3 (6) | 9 (12) | 12 (12) |
| Income [no. (%)] | ||||
| < $30,000 | 6 (8) | 5 (11) | 8 (11) | 16 (17) |
| $30,000 to < $60,000 | 22 (31) | 14 (30) | 17 (24) | 29 (32) |
| $60,000 to < $90,000 | 16 (22) | 16 (34) | 21 (30) | 24 (24) |
| > $90,000 | 28 (39) | 12 (26) | 24 (34) | 23 (25) |
| Smoking status [no. (%)] | ||||
| Never-smoker | 43 (59) | 28 (56) | 35 (47) | 55 (57) |
| Ever-smoker | 30 (41) | 22 (44) | 39 (53) | 42 (43) |
| Former | 16 (22) | 6 (12) | 18 (24) | 21 (22) |
| Current | 14 (19) | 16 (32) | 21 (28) | 21 (22) |
a
Information missing on race for two men and on income for eight men.
b
Comparison group consists of men with all three semen parameters greater than the reference level.