(Comparing Trump to sports stars is clearly imprecise; body-mass index, according to the National Institutes of Health, "may overestimate body fat in athletes and others who have a muscular build," and underestimate it "in older persons and others who have lost muscle").
However, although it is useful in epidemiologic studies, it is highly imprecise at estimating body fat at an individual level (9, 15).
We used skinfold measurements to define the level of obesity in addition to the more imprecise measure of body mass index, and we assessed aerobic fitness, all important cardiovascular risk factors, and physical activity by objective means.
In fairness, comparisons between the L.P.G.A., an independent organization not affiliated with the PGA Tour, and other sports bodies are imprecise.
However, skinfold thickness is a relatively imprecise measure for evaluating total body fat or regional fat, and does not precisely assess changes due to fluid losses [ 30, 41, 47].
This has been widely interpreted as a 1.5 kg effect on fatness but, given the imprecise linkage of BMI to body fatness (e.g. Ode et al., 2007; Okorodudu et al., 2010), this might be an overestimate.
Weight and body mass index are imprecise indicators of nutritional status.
In other words, the assumption that shell material production is constantly proportional to body mass might be imprecise.
The most commonly used methods to calculate daily fluid balance, such as monitoring changes in body weight, are obviously imprecise with pronounced diversity between different methods [ 2].
The SP reference level is generally placed according to imprecise anatomical details due to differences in patient's body habitus.
