Housing and management factors and breed predisposition for haemorrhagic bowel syndrome in swine

Table 2 Descriptive statistic of categorical variables with a p-value < 0.1 in the univariable statistical analysis (logistic regression). Results are sorted by case and control group

Categorical variable	Overall	Case herds	Control herds	p-value
Breed of sire (%)				< 0.001
Duroc	22.68	4.16	40.82
PREMO®	35.05	50	20.41
PREMO® / Duroc	26.81	37.5	16.33
other	15.46	8.34	22.44
Origin of pigs per batch				< 0.001
One origin	74.23	56.25	91.84
Two or more origins	25.77	43.75	8.16
Frequency of stabulation				0.077
Weekly	11.34	18.75	4.08
Every two weeks	37.11	37.5	36.73
Every three weeks	13.41	8.34	18.37
Monthly	11.34	6.25	16.33
Other	26.8	16.16	24.49
Frequency of cleaning of the distribution pipes				0.035
Daily	2.06	2.08	0
Weekly	8.25	14.58	2.04
Monthly	12.37	16.67	8.16
After every group	9.28	10.42	8.16
Every six month	4.12	2.08	6.12
Less than six month	7.2	4.17	10.21
Never	53.61	43.75	63.27
NA	3.11	6.25	0
Mode of cleaning of the distribution pipes				0.096
Acid solution	16.5	22.92	10.2
Alkaline solution	16.5	20.83	12.25
Other	57.72	50	65.31
Frequency of cleaning of the storage containers				0.085
Daily	2.07	2.09	3.07
Weekly	8.25	14.58	4.08
Monthly	12.37	16.66	8.16
After every group	9.28	10.42	8.16
Every six months	4.12	2.09	3.07
Less than six months	7.2	4.16	10.2
Never	53.61	43.75	63.26
NA	3.1	6.25	0

This table is based on date of 48 case and 49 control herds. Data was not normally distributed. NA = no answer.

ISSN: 2055-5660