Table 2.

p-value table of the linear model describing the effect of the model terms (screw configuration, last-barrel set temperature and moisture content) on the extrusion dependent variables (outlet pressure, specific mechanical energy (SME), product temperature at the extruder outlet) and the measured product variables (strong water binding capacity (SWBC), extractability, extract viscosity, water-extractable arabinoxylan (WE-AX) content and arabinose to xylose (A/X) ratio). The model was built for each output variables (Y) using the following equation: Y = α + β₁ × Configuration + β₂ × Temperature + β₃ × Moisture. The output variable is determined by the model terms if p-value is smaller than 0.05 (significance threshold).

Model Terms (Controlled Factors)
Output Variables	Screw Configuration	Temperature (Last Barrel)	Moisture Content
Extrusion-dependent variables
Outlet Pressure	0.3252	0.0038	0.0006
SME	0.0907	0.0234	0.0023
Product Temperature	0.0006	<0.0001	0.0014
Measured product variables
SWBC	0.0012	0.0275	0.0963
Extractability	0.1452	0.6705	0.6033
Extract Viscosity	0.0543	0.8002	0.0613
WE-AX content	0.1327	0.8705	0.1685
A/X ratio	0.2125	0.8273	0.1602