Exploring Appropriate Strategies for Vaccination against Classical Swine Fever under a Dynamic Change in Antibody Titer in Sows after Starting Vaccination in a Japanese Farm Setting

Table 2

Comparison of observed and predicted S/P ratio distributions and proportions of pigs protected by MDAs (neutralizing titer ≥ 6 log₂) or VIAs (S/P ratio ≥ 0.05) and results of model validation by Wilcoxon rank-sum test and chi-square test.

Age (weeks)	Mean S/P ratio 50th percentile (5th and 95th percentiles)		Proportion of protected pigs 50th percentile (5th and 95th percentiles)		p-Value 50th percentile (25th and 75th percentiles)
	Observed	Predicted	Observed	Predicted	Wilcoxon rank-sum test	Chi-square test
6^a	0.375 (0.345, 0.396)	0.318 (0.286, 0.343)	0.204 (0.152, 0.232)	0.208 (0.144, 0.256)	0.057 (0.007, 0.288)	0.502 (0.202, 0.826)
26^b	0.392 (0.349, 0.433)	0.317 (0.275, 0.365)	0.664 (0.604, 0.716)	0.624 (0.560, 0.680)	0.001 (<0.001,0.009)	0.329 (0.119, 0.646)

^aAt the time of vaccination; all S/P ratios are MDAs. ^bAt the time of slaughter; S/P ratios are VIAs.