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Bioelectrical impedance analysis. Bioelectrical impedance analysis (BIA) is a method for estimating body composition, in particular body fat and muscle mass, where a weak electric current flows through the body, and the voltage is measured in order to calculate impedance (resistance and reactance) of the body. Most body water is stored in muscle.
By comparison with BMI, BRI quantifies body girth in relation to height, potentially providing more accurate estimates of fat mass. BRI scores range from 1 to 16, with most people between 1 and 10, although people with scores of 6.9 and up – indicating wider, rounder bodies – were found to have a risk of all-cause mortality that was ...
However, its accuracy declines at the extremes of body fat percentages, tending to slightly understate the percent body fat in overweight and obese persons (by 1.68–2.94% depending on the method of calculation), and to overstate to a much larger degree the percent body fat in very lean subjects (by an average of 6.8%, with up to a 13% ...
Madeleine Haase. October 9, 2024 at 8:30 AM. Body roundness index (BRI), may be a better predictor of disease than body mass index (BMI), new research shows. Researchers determined that higher BRI ...
Electrical impedance tomography(EIT) is a noninvasivetype of medical imagingin which the electrical conductivity, permittivity, and impedanceof a part of the body is inferred from surface electrodemeasurements and used to form a tomographicimage of that part. Electrical conductivity varies considerably among various biological tissues (absolute ...
Esophageal pH monitoring. In gastroenterology, esophageal pH monitoring is the current gold standard for diagnosis of gastroesophageal reflux disease (GERD). It provides direct physiologic measurement of acid in the esophagus and is the most objective method to document reflux disease, assess the severity of the disease and monitor the response ...
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