Table 1.

Background information on semen parameters in healthy donors and infertile men used in the study

Parameter	Healthy donors (n = 46)	Infertile patients (n = 279)
Age (years)	37.57 ± 11.37	35.61 ± 6.06
Ejaculatory abstinence (days)	3.54 ± 1.72	3.98 ± 2.75
Sperm concentration (×106/mL)	54.50 ± 33.53	47.27 ± 53.58
Leukocytes (×106/mL)	0	0.27 ± 0.89
Diagnosis of varicocele (%)	0	34.05

Data are expressed as mean ± standard deviation