Table 8. Odds ratio (OR) for DFI in the group of men aged ≥ 40 y compared to men <40 y with normal standard semen parameters.

	<40 (n = 116) n(%)	≥40 y (n = 44) (n%)	OR (95%CI)
DFI 0–10%	52(44.83)	11(25.00)	0.4103* (0.1891–0.8899)
DFI >10%	64(55.17)	33(75.00)	2.4375* (1.1237–5.2871)

DFI – sperm DNA fragmentation index, n – number of subjects.*statistical significance at p = 0.0241; 95% CI – 95% confidential interval