Table 3.

Correlation between piglet survival, piglet body weight at challenge, and levels of granulocyte-macrophage colony-stimulating factor (GM-CSF) and neutralizing antibody (NABs) titers in sow milk and serum.

Predictor	p-Value	Odds Ratio 95% Lower Limit	Odds Ratio 95% Upper Limit
Standardized Weight	≤0.001	1.96	6.11
Standardized Milk GM-CSF	0.02	0.05	0.72
Standardized Sera GM-CSF	0.27	0.68	4.01
Milk NABs	≤0.001	3.71	65.89
Sera NABs	0.38	0.11	2.18

Variables with p ≤ 0.05 are significant predictors of piglet survivability. Cytokine levels were standardized such that a value of one indicates a GM-CSF level one standard deviation above average. Milk NAB titers greater than or equal to 40 and sera NAB titers were greater than or equal to a titer of 20 were used as the cut-off values.