Table 5. Prevalence of DFI in the group of men aged ≥40 y and <40 y with normal standard semen parameters.

Group	DFI (%)
	0–10% n(%)	>10% n(%)
<40 y (n = 116)	52(44.83)	64(55.17)
≥40 y (n = 44)	11(25.00)*	33(75.00)*

DFI – sperm DNA fragmentation index, n – number of subjects. *Significant difference between compared groups at p = 0.0223; chi-squared test