Table 4. Multiple regression analyses with peak GH response to GHRP-2.

	β	P
Model 1
Interaction effect (overweight × tumor height)	-0.191	0.040
Overweight	-0.359	< 0.001
Tumor height	-0.557	< 0.001
Model 2
Interaction effect (overweight × tumor depth)	-0.244	0.007
Overweight	-0.340	< 0.001
Tumor depth	-0.566	< 0.001
Model 3
Interaction effect (BMI × tumor height)	-0.209	0.014
BMI	-0.449	< 0.001
Tumor height	-0.448	< 0.001
Model 4
Interaction effect (BMI × tumor depth)	-0.259	0.002
BMI	-0.408	< 0.001
Tumor depth	-0.478	< 0.001

BMI, body mass index; GH, growth hormone; GHRP-2, growth hormone-releasing peptide-2.