|
Parameters
|
N
|
SN
|
|---|
|
Cigarette pack yearsa
|
0
|
15.00 ± 2.64
|
|
Age (years)
|
32.54 ± 0.60
|
34.13 ± 0.99
|
|
Sperm density (× 106 cells/mL)
|
99.23 ± 10.54
|
91.53 ± 10.91
|
|
Semen volume (mL)
|
2.77 ± 0.18
|
2.93 ± 0.27
|
|
Sperm vitality (%)
|
85.54 ± 1.99
|
86.04 ± 1.47
|
|
Sperm motility (%)
|
63.00 ± 2.38
|
57.96 ± 2.17
|
|
Semen ROS (U/L)
|
1515 ± 520
|
3807 ± 912*
|
|
Sperm histone-transition abnormality
|
9.98 ± 0.88
|
12.92 ± 1.03*
|
|
Methylation level of sperm DNA (%)
|
1.94 ± 0.16
|
2.44 ± 0.16*
|
- Data are presented as means ± SEM
- N normozoospermic men who did not smoke; SN normozoospermic men who smoke heavily. aCigarette pack years was calculated by multiplying smoking dose (packs per day) by duration (years of smoking)
- *p < 0.05 compared to the N group
