Fat-free mass index and fat mass index percentiles in Caucasians aged 1898 y

/m²nHighlight:In young women, FMI averaged 5.5 kg/m² (range 5th–95th percentile: 3.5–8.7 kg/m²) ie 38% higher than in malesnHighlight:BMI is the sum of FFMI+FMInHighlight:FMI were significantly higher in elderly subjects as compared to younger onesnHighlight:During menopause and aging^39,40 changes in FFM and FM are not adequately picked up by changes in BMInHighlight:One advantage of FMI, as compared to the BMI concept, is that it amplifies the relative effect of aging on body fatnHighlight:We believe that the definition of obesity based on relative body fat (ie percentage) remains of great value for the definition of obesity. However, in a situation in which a patient is losing weight without substantially changing his/her relative body fat (as is the case with crash diets), the calculation of FMI will quantitatively reveal the amount of body fat store lost.nHighlight:high sensitivity of FMI (respectively FFMI) to a slight change of body fat storesnHighlight:Sarcopenic obesity has been defined as a low FFM associated with a high body fatnHighlight:relative FFM lower than 73% (ie a relative body fat greater than 27%) in men and a FFM lower than 62% (ie a body fat greater than 38%) in women.nHighlight:FMIs greater than 8.2 kg/m² in men and 11.8 kg/m² in women would define the ‘overfat’ status (rather than the overweight range) in terms of fat massn]]>