Table 9. Odds ratio (OR) for DFI in the group of men aged ≥40 y compared to men <40 y with abnormal standard semen parameters.

	<40 y (n = 132) n(%)	≥40 y (n = 44) n(%)	OR (95%CI)
DFI 0–10%	63(47.73)	13(29.54)	0.4593* (0.2209–0.9551)
DFI >10%	69(52.27)	31(70.46)	2.1773* (1.0470–4.5278)

DFI – sperm DNA fragmentation index, n – number of subjects. *statistical significance at p = 0.0373; 95% CI – 95% confidential interval