Table 6. Prevalence of DFI in the group of men aged ≥40 y and <40 y with abnormal standard semen parameters.

Group	DFI (%)
	0–10% n(%)	>10% n(%)
<40 y (n = 132)	63(47.73)	69(52.27)
≥40 y (n = 44)	13(29.54)*	31(70.46)*

DFI – sperm DNA fragmentation index, n – number of subjects. *Significant difference between compared groups at p = 0.0355; chi-squared test.