. 2019 Jan 10;184(7):222. doi: 10.1136/vr.104972

Table 5.

Percentage and number (in parentheses) of seropositive sows and pigs at 12–24 hours post-farrowing and at weaning, respectively, together with the inhibition percentages (IP)

Herd A
	a	b	c	d	P value	a– c (NV)	b–d (V)	P* value
Sows seropositive	20.0 (1/5)	80.0 (4/5)	0.0 (0/5)	100.0 (5/5)	0.380	10.0 (1/10)^A	90.0 (9/10)^B	0.001
Sows IP	25.6^AB	77.5^ABC	26.8^B	94.4^C	0.005	26.2^A	86.0^B	0.000
Pigs seropositive	6.8 (4/59)^A	74.6 (50/67)^B	5.1 (3/59)^C	90.0 (54/60)^D	0.000	5.9 (7/118)^A	81.9 (104/127)^B	0.000
Pigs IP	15.6^A	68.1^B	29.0^A	79.6^B	0.000	22.3^A	73.2^B	0.000
Herd B
	a	b	c	d	P value	a– c (NV)	b–d (V)	P* value
Sows seropositive	40.0 (2/5)	80.0 (4/5)	0.0 (0/4)	80.0 (4/5)	0.532	22.0 (2/9)^A	80.0 (8/10)^B	0.023
Sows IP	39.0^AB	56.4^AB	19.9^A	68.8^B	0.049	30.5^A	62.6^B	0.017
Pigs seropositive	42.2 (27/64)^A	66.7 (38/57)^B	3.3 (2/60)^C	77.6 (45/58)^B	0.000	23.4 (29/124)^A	72.2 (83/115)^B	0.000
Pigs IP	42.4^A	79.3^B	24.6^C	65.2^D	0.000	38.5^A	72.5^B	0.000

Vaccination status: NV (non-vaccinated sow batches and their pigs) and V (vaccinated sow batches and their pigs). The P value refers to the comparisons between the individual farrowing batches, and the P* value to the comparisons between the summaries of the NV (a–c) and V (b–d) batches. Values with different superscripts within a row are significantly different (P<0.05 and P*<0.05).