Superoxide Dismutase: A Predicting Factor for Boar Semen Characteristics for Short-Term Preservation

Table 3

Cut-off values (breaking points) and diagnostic parameters of semen variables on day 0 and on day 3.

Variable—day 3	Breaking point	AUC (𝑃)	Sens. (%)	Spec. (%)	PPV (%)	NPV (%)
	SOD (U/mL)—day 0
Progressive motility	1.22	0.86 (0.0003)	87.5	88.9	87.5	88.9
Mor. normal form	1.26	0.70 (0.0697)	80.0	75.0	57.1	90.0
Viability	1.26	0.85 (0.0002)	100	76.9	57.1	100
Group 1/Group 2	1.05	0.97 (<0.0001)	90.0	100	100	87.5
	TBARS (𝜇mol/L)—day 0
Motility	40.73	0.68 (0.0888)	60.0	66.7	42.9	80.0

AUC (ROC): area under the curve (receiver operating characteristics); 𝑃: statistical significance; Sens.: sensitivity; Spec.: specificity; PPV: positive predictive value; NPV: negative predictive value.