Risk factors and epidemiological characteristics of new neonatal porcine diarrhoea syndrome in four Danish herds

BMC Veterinary Research

Table 5 Results of the overall generalized linear mixed model on NNPDS

Risk factor	Coefficient	SE	OR_PA¹	P-value
Intercept	−1.63
Herd ²				<0.001
Herd 4	0^a
Herd 2	0.49^a,b	0.36	1.4
Herd 3	1.11^b	0.37	2.7
Herd 1	2.68^c	0.38	12.8
Parity				< 0.001
2nd-7th	0
1st	1.54	0.28	4.1
Birth weight				0.003³
Per 100 g	−0.09	0.03	0.8
Day one faecal consistency				0.006³
Normal	0
Liquid	0.54	0.19	1.5
ICC ⁴ litter	21%

¹The population average OR accounts for an average piglet in any litter. ²Herds with different letters as superscript are significantly different (α < 0.05) when compared pairwise. ³Note: This model did not include interaction effects – therefore these effects are finally evaluated in the herd specific models. ⁴Intra Class Correlation Coefficient (the percentage of total variation in data that is explained by the random litter effect).
Risk factors evaluated included: Herd, parity of sow, number of stillborn, clinical disease in sow, gender, birth weight, faecal consistency, appearance of flanks and appearance of hair coat.

ISSN: 1746-6148