. 2022 Mar 28;9:840716. doi: 10.3389/fvets.2022.840716

Table 1.

General production data in the pig production chains differentiated by the occurrence of porcine reproductive and respiratory syndrome.

Rearing phase:	Weaning		Fattening		SEM	Year				SEM	P -value
Productive chain¹:	PRRS–	PRRS+	PRRS–	PRRS+		2017	2018	2019	2020		Chain	Phase	C × P	Year
Pig (thousand)	116.0	65.3	108.2	54.4	6.1	84.1	79.8	81.9	98.1	6.14	<0.0001	0.16	0.80	0.21
Starting live weight, kg	7.1	6.9	32.0	31.7	0.8	18.4	18.8	21.1	19.3	0.8	0.75	<0.0001	0.92	0.12
Final live weight, kg	32.2	31.3	170.9	168.5	1.1	99.2	100.5	101.5	101.7	1.1	0.16	<0.0001	0.50	0.42
Average age, days	55.9	59.8	199.0	203.4	1.9	132.1	130.7	126.4	128.9	1.9	0.058	<0.0001	0.90	0.25
Daily live weight gain, g	449	407	699	674	9.0	541	559	566	563	8.57	0.003	<0.0001	0.36	0.23
Feed to gain	1.71	1.83	3.43	3.62	0.05	2.76	2.72	2.6	2.5	0.05	0.009	<0.0001	0.51	0.01
Total losses²	2.55^A	14.49^B	4.64^A	9.04^AB	1.61	9.47	9.72	5.92	5.61	1.61	0.001	0.32	0.04	0.20
Cost index²	1.63^aB	1.91^bB	0.88^A	0.93^A	0.05	1.41	1.37	1.27	1.3	0.05	0.008	<0.0001	0.04	0.20
Medication costs², €/kg	0.04^A	0.12^B	0.03^A	0.04^A	0.01	0.07	0.06	0.04	0.04	0.01	0.002	0.002	0.005	0.33

PRRS–, the production chain originated from sows seronegative for porcine reproductive and respiratory syndrome; PRRS+, the production chain originated from sows seropositive for porcine reproductive and respiratory syndrome.

Means with differently labeled letters are significantly different at p <0.05 (lowercase) or p <0.01 (uppercase).