White Paper
Summary
Texas Tech University took 60 individuals and put them through eight different body composition measurement processes (including ours) to test against DXA.
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1. Prism’s iPhone scanner is extremely consistent
Same-day, repeat scans measuring body fat percentage were 4.6 times more reliable than DXA and 16 times more reliable than BIA.
Why is this important?
Changes in body fat percentage, lean mass and fat mass are small and typically take many weeks to achieve. Therefore, test-retest error must be small enough to identify this change. Additionally, large test-retest error may not accurately reflect changes in body fat percentage, lean and fat mass, discouraging users, resulting in attrition. Importantly, this same-day test-retest consistency is exceptional compared to other, more expensive and invasive methods of body composition assessment.
2. Prism’s 3D bodymapping is extremely consistent
Same-day, repeat scans of body circumferences, used to generate a 3D body map, varied by an average of just .083 inches/2mm. This makes Prism’s body mapping technology one of, if not the, best available.
Why is this important?
Generating a 3D image which will accurately represent the individual and be consistent enough to show small changes in the circumference of specific areas of the body over time requires extremely consistent circumference measurements of dozens of anatomical locations. This helps allows individuals to visualize small changes in the shape of their body over time, providing another positive motivator, in addition to traditional body composition data.
3. Prism’s body composition measurements are similar to DXA
Prism’s measurements of body fat percentage were within 4.8 (absolute body fat percentage) of DXA.
Why is this important?
Much of the published data on the relationship between health and body composition as well as population norms, segmented by age, sex, ethnicity, etc., is collected using DXA. Therefore, it is useful for emerging body composition technologies, like the Prism iPhone scanner, to have strong agreement/correlation with DXA.
