RESUMO
There are original cut-off values of muscle mass indices measured by computed tomography for the diagnostic of sarcopenia in the different countries and regions of the world. In order to get corresponding data for Russia a retrospective analysis of computed tomography data of abdomen of 310 liver donors (151 women, 159 men) presented different country´s regions was performed. The analysis was carried out by two radiologists with more than 10 years of experience and included the determination of the areas of skeletal muscles at the level of the ThXII and LIII vertebrae, followed by the calculation of muscle mass indices with height normalization. A strong correlation was demonstrated between the results of the work of the two radiologists (r=0,98). Cut-off values of muscle mass indices were calculated by two methods: as the difference between the mean and two standard deviations and as the 2,5 percentile. At the ThXII level in women, the cut-off values were EMIThXII 6,4 and 7 cm2/m2, SMIThXII 15,7 and 18,6 cm2/m2, respectively; in men EMIThXII 8,4 and 9,2 cm2/m2, SMIThXII 20,1 and 23,1 cm2/m2, respectively. At the LIII level in women, the cut-off values were PMILIII 2,4 and 2,4 cm2/m2, SMILIII 28,4 and 32,1 cm2/m2, respectively; in men PMILIII 2,9 and 4,9 cm2/m2, SMILIII 38,2 and 41,1 cm2/m2, respectively.
