Table 2: Model summary of the multiple linear regression analysis of salivary ghrelin concentration as a dependent variable with age, weight, height, muscle mass and body fat in underweight, normal weight, overweight, and obese groups.

Group	R	R square	Adjusted R square	F	P value
Underweight	1.0	1.0	-	-	-
Normal weight	0.550	0.302	-0.033	0.901	0.563
Overweight	0.787	0.619	0.000	1.000	0.520
Obese	0.961	0.924	0.741	5.044	0.043*

*Significant association p<0.05.

Dependent variable: ghrelin. Predictors (constant): age, height, weight, whole-body muscle mass, total body fat percentage, and whole-body subcutaneous fat, the muscle mass of the arms, legs, and trunk, subcutaneous fat in the arms, legs, and trunk, as well as visceral fat.