Table 3.

Results of the Stepwise Procedure Adopted Both for the Linear Model and for the Model with Interactions and Quadratic Terms

	Linear model
	F-statistic	P	R2
1. Add CHO	258.054	<0.00001	0.273
2. Add meal	9.840	<0.00001	0.304
3. Add weight	3.953	0.047	0.308
	Extended model
	F-statistic	P	R2
1. Add CHO	258.054	<0.00001	0.273
2. Add CHO2	31.700	<0.00001	0.305
3. Add meal	4.655	0.003	0.319
4. Add CHO:meal	6.998	0.0001	0.340
5. Add fiber	5.115	0.024	0.345
6. Add fiber:meal	5.304	0.001	0.360

The variable added or removed at each step (first column), the value of the F-statistic (second column), the corresponding P-value (third column), and the value of the R² parameter (fourth column) for the current model are reported.