Table 2.

Reference values for the FMI.

Categories	FMI reference values
	Men	Women
Class III obesity	> 15.0 kg/m2	> 21.0 kg/m2
Class II obesity	12.1-15.0 kg/m2	17.1-21.0 kg/m2
Class I obesity	9.1-12.0 kg/m2	13.1-17.0 kg/m2
Overweight	6.1-9.0 kg/m2	9.1-13.0 kg/m2
Normal weight	3-6 kg/m2	5-9 kg/m2
Mild fat deficit	2.3-3.0 kg/m2	4.0-4.9 kg/m2
Moderate fat deficit	2.0-2.2 kg/m2	3.5-3.9 kg/m2
Marked fat deficit	< 2.0 kg/m2	< 3.5 kg/m2

Source: Adapted from Kelly et al.⁽⁸⁾.