How to Estimate Fat Mass in Overweight and Obese Subjects

Table 5

Forward stepwise multivariate regression analysis (FM from DXA as dependent variable).

	Step	Variables entered	𝑅^2	𝑅^2 change	Sig. 𝐹 change	𝑅^2 adj
	1	Constant; FM-BIA	0.828		0.000	0.826
	2	Leptin	0.847	0.02	0.001	0.844
Model 1	3	BMI	0.863	0.016	0.001	0.859
	4	H	0.871	0.008	0.019	0.866
	5	AFA	0.877	0.006	0.032	0.871
Model 2	1	Constant; FM-BIA	0.831		0.000	0.829
	2	Leptin	0.851	0.019	0.001	0.848
Model 3	1	Constant; BMI	0.541		0.000	0.537
	2	Leptin	0.677	0.135	0.000	0.67

Legend: BMI: body mass index; AFA: arm fat area; H: hips circumference; FM-BIA: fat mass estimate through bioimpedance analysis.