total body fat-free mass total body fat-free mass to total body mass ratio 2023-08-25T13:21:19Z CMO:0003946 PMID:37191987 This is a calculated value in which the total lean mass of an organism is divided by the total mass of an organism and presented as a ratio, fraction, quotient or percentage, thus normalizing lean mass to the total mass of the body. Whole body lean tissue mass of an organism is determined by subtracting whole body fat mass from total body mass. clinical_measurement_ontology slaulede total body fat-free weight to total body weight ratio