Table 1. Characteristics of patients and sperm parameters.

Values are presented as means ± standard deviation.

BMI = body mass index

Characteristics		Smokers (n = 45 patients)	Non-smokers (n = 139 patients)	p-value
No. of cycles		45	139	-
Female age (y)		35.7±3.3	34.9±3.4	0.135
Male age (y)		36.1±7.0	36.6±5.3	0.703
Cigarettes / day		14.4±8.7	0	-
Cigarettes / y		15.4±5.2	0	-
Male BMI (kg/m2)		24.1±3.6	23.6±3.1	0.715
No. of retrieved oocytes (n)		5.9±4.0	6.0±5.3	0.771
Semen volume (mL)		2.7±1.4	2.7±1.2	0.923
Sperm concentration (million/mL)		77.3±42.1	73.1±43.2	0.311
Sperm motility (%)		55.6±15.0	52.1±14.9	0.267
Total motile sperm (million)		131.7±154.9	97.2±86.6	0.250