Table 6.

Regression parameters for the relationship between total lesion scoring at duodenum, upper jejunum , lower jejunum, and digestibility of dry matter, energy, amino acids (AA) starch, fat, and ash^1,2.

	Dry matter	Mean AA	IDE (kcal/kg DM)	Starch	Fat
Linear (P-value)	0.0002	0.0001	0.0001	0.0001	0.0001
Quadratic (P-value)	0.02	0.37	0.04	0.97	0.75
Equation	y = 0.7178906 − 0.0273292* x	y = 0.8304746	y = 3318.991805 − 162.8083535*x	y = 0.9424404	y = 0.8557188
	− 0.0081775*(x−1.83871)2	− 0.0380651*x	− 30.4154507*(x−1.838709)2	− 0.0336953*x	− 0.1591196*x
R-square	0.72	0.83	0.80	0.56	0.92
RMSE3	0.05	0.04	0.95	0.06	0.10

¹Orthogonal polynomial contrasts were used to assess the significance of linear or quadratic models to describe the response in the dependent variable to lesion scoring.

²Total lesion score was calculated as the sum of lesion score in the three intestinal segments (duodenum, upper jejunum, and lower jejunum).

³Root mean square error.