Cart before Horse?

(Jul 26, 2016)

Predicting the exact impact of weight upon mortality has proven to be a tricky business. That obesity is on the rise is universally acknowledged, but in recent years we have seen research studies reach differing conclusions, depending on the populations examined and the measures used. For example, there has been debate over whether the breakpoints used to analyse BMI, the most prominent weight measure are appropriate in all populations. A key issue posited, however, has been that of "reverse causality" - which in this context is usually interpreted as the failure to adjust for weight scores that are considered "healthy" under the BMI scale but in fact derive from illness-related weight-loss. The question…

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Tags: mortality, research, reverse causality, obesity, BMI

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