. 2018 Mar 6;5:41. doi: 10.3389/fvets.2018.00041

Table 9.

Mean and SD of biosecurity scores, health indicators, welfare outcomes, and production performance, and of the study sample of fattening pig farms in Great Britain according to three clusters derived from the PCA analysis (based on the active variables).

	Cluster 3 (n = 18)		Cluster 2 (n = 11)		Cluster 1 (n = 11)
	Mean	SD	Mean	SD	Mean	SD
Active variables
Fattening pigs	2,733^b	1,513	1,578^a,b	1,220	1,232^a	646
Average daily weight gain	834^b	60	734^a	54	718^a	46
Feed conversion ration	2.55^b	0.46	2.44^a,b	0.19	2.15^a	0.17
Mortality	2.82^b	0.71	5.22^a	1.18	3.96^a,b	1.64
Pig requiring hospitalization	0.01	0.03	0.12	0.02	0.03	0.04
Lameness	0.02^b	0.05	0.62^a	0.42	0.05^a,b	0.06
Severe tail lesions	0.03^b	0.06	0.29^a,b	0.18	0.63^a	0.64
Severe body marks	0.08^b	0.13	0.09^a,b	0.02	0.58^a	0.35
External biosecurity score	77^b	8	76^b	5	68^a	8
Internal biosecurity score	65^b	13	70^b	10	46^a	12
Total biosecurity score	71^b	9	73^b	6	57^a	9
Enzootic pneumonia	16.49	13.11	9.43	4.41	21.08	12.62
Pleurisy	5.33	7.17	1.95	1.30	6.45	5.64
Tail-bitten pigs	0.26	0.86	0.07	0.14	2.28	3.69

Supplementary variables
Pericarditis	1.85	1.22	1.60	1.04	2.14	0.89
Peritonitis	0.12^a,b	0.15	0.01^b	0.04	0.42^a	0.46
Milk spots	0.06	0.12	0.01	0.04	0.07	0.17
Hepatic scarring	0.86	1.15	0.33	0.60	3.01	4.11
Papular dermatitis	0.97	3.50	0.00	0.00	3.65	6.67
Viral-type distribution	0.25	0.43	0.12	0.33	0.09	0.17
Pleuropneumonia—acute	0.14	0.19	0.00	0.00	0.22	0.26
Pleuropneumonia—chronic	0.15	0.30	0.01	0.02	0.03	0.05
Abscess	0.25	0.33	0.04	0.10	0.14	0.13
Pyaemia	0.12	0.19	0.02	0.04	0.09	0.12

^a,bMeans in the same row with different letters are significantly different (P < 0.05).