Table 3.

Influence of oat bran level, digestibility index marker level, method, and duration of feces collection on apparent total tract digestibility of GE in experimental diets fed to pigs in Exp. 2¹

Item	OB level, g/kg	DIM level, g/kg	Method	n 2	ATTD of GE, %
	0	2.5	Cr2O3	12	84.6
	0	2.5	TiO2	12	86.0
	0	2.5	TC	12	87.9
	0	5.0	Cr2O3	12	84.0
	0	5.0	TiO2	12	84.6
	0	5.0	TC	12	87.7
	0	7.5	Cr2O3	11	84.7
	0	7.5	TiO2	11	85.1
	0	7.5	TC	11	87.7
	100	2.5	Cr2O3	12	83.3
	100	2.5	TiO2	12	84.9
	100	2.5	TC	12	86.9
	100	5.0	Cr2O3	12	83.1
	100	5.0	TiO2	12	84.0
	100	5.0	TC	12	86.9
	100	7.5	Cr2O3	12	82.6
	100	7.5	TiO2	12	83.1
	100	7.5	TC	12	86.0
	0			105	85.8
	100			108	84.5
			Cr2O3	71	83.7z
			TiO2	71	84.6y
			TC	71	87.2x
SED3
OB level					0.24
DIM level					0.39
Duration of feces collection					0.34
Method					0.18
P value4
OB level					0.003
DIM level					0.231
Duration of feces collection					0.109
Method					<0.001

^x,y,zMain effect means for method within a column without a common superscript letter differ (P < 0.05).

¹ATTD = apparent total tract digestibility; OB = oat bran; DIM = digestibility index marker; Cr₂O₃ = chromic oxide; TiO₂ = titanium dioxide; TC = total collection.

² n = number of observations; it includes 3- and 5-d duration of feces collection.

³Duration of feces collection refers total collection of feces for either 3 or 5 d after a 7-d adaptation. Method refers the use of total collection, Cr₂O₃, or TiO₂ to determine digestibility.

⁴The P values for all the interactions including OB level, DIM level, duration of feces collection, or method are all >0.10, and the P values are not presented.