Aim of the study is to develop prediction equations for calculating FFM, TBW, ECW and SMM based on the gold standard reference methods ADP, DXA, MRI, D2O and NaBr on the one hand and measurement data of the BIA devices on the other hand. The equations are necessary to use the device as a Body Composition Analyzer with an acceptable accuracy level for clinical practice.
Study Type
OBSERVATIONAL
Enrollment
153
Institute of Human Nutrition and Food Science
Kiel, Germany
Bioelectrical Impedance of 5 and 50 kHz for one body side
Time frame: 15 minutes
Bioelectrical Impedance of 50 kHz for all 4 extremities
Time frame: 15 minutes
Bioelectrical Impedance of 1, 1.5, 2, 3, 7.5, 10, 15, 20, 30, 75, 100, 150, 200, 300, 500, 750 and 1,000 kHz
The measurement is planned to be done for all body segments: right arm, left arm, right leg, left leg, trunk, right body side and left body side. In total resistance and reactance at 19 frequencies for 7 body segments are planned to be measured.
Time frame: 15 minutes
Generation of prediction equations for Sceletal Muscle Mass based on MRI
Time frame: 1 hour
Bioelectrical Impedance in sitting, lying and standing
Time frame: 15 minutes
Precision Study
The precision study pursues three targets: 1. Repeatability (variability across successive measurements within a short time period taken by the same operator and the same device; device is repositioned between successive measurements). 2. Between-operator precision (variability across measurements taken by the same device, but different operators). 3. Between-device precision (variability across measurements taken by the same operator, but different devices).
Time frame: 15 min
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