Table 4: Model summary of the multiple linear regression analysis of salivary ghrelin concentration as a dependent variable with waist circumference, hip circumference, body mass index, waist-to-hip ratio, and waist-to-height ratio in normal weight, overweight and obese groups.

Group	R	R square	Adjusted R square	F	P-value
Underweight	0.92	0.85	0.61	3.498	0.166
Normal weight	0.414	0.171	0.053	1.444	0.233
Overweight	0.255	0.065	-0.227	0.222	0.948
Obese	0.879	0.773	0.678	8.156	0.001*

*Significant association p<0.05.