Association between gastric content fluidity and pars oesophageal ulcers in nursery pigs: a cross-sectional study of high-risk Danish herds using commercial feed

Table 4 Generalised additive model with binary response and logistic link function for evaluating the risk of POU in 200 nursery pigs, with farm as a random effect

Parameter	Type	Coefficients	EDF	P-value
Intercept	Fixed	−1.63	–	< 0.001
Sex (Males)	Fixed	0.5	–	NS
Farm	Random	–	5.44	< 0.001
^aSolid phase	Thin plate regression spline	–	2.74	< 0.001

^a Solid particle sedimentation percentage from the gastric content after 24 h at 4 °C. NS Non-Significant. EDF Effective Degrees of Freedom

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