Clinical Factors Associated with Sperm DNA Fragmentation in Male Patients with Infertility

Table 1

The characteristics of the patients who underwent semen analyses (𝑛=54).

Parameter	Mean	S.D.	Median	Interquartile range
Age (years old)	34.9	5.1	35	31–39
Age of female partner (years old)	33.2	4.6	32	30–37
Duration of infertility (months)	36.0	28.3	30	17.3–43.3
Serum LH (mIU/mL)	4.80	2.34	4.20	3.28–5.85
Serum FSH (mIU/mL)	6.73	3.54	5.6	4.40–8.63
Serum total testosterone (ng/mL)	4.80	1.59	4.84	3.44–5.93
Serum free testosterone (pg/mL)	9.56	2.85	9.25	7.6–11.3
Brinkman index^#	138	236	0	0–235
Body mass index (kg/cm^2)	23.5	2.7	23.3	21.3–26.9
Causes of male infertility
Idiopathic		𝑛=21
Varicocele		𝑛=33
Chronic alcohol use
(+)		𝑛=27
(−)		𝑛=27
Current smoking
(+)		𝑛=10
(−)		𝑛=43
Unknown		𝑛=1

S.D.: standard deviation; LH: luteinizing hormone; FSH: follicle-stimulating hormone; #daily number of cigarettes × years.