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2016 ; 24
(4
): 781-90
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Common scientific and statistical errors in obesity research
#MMPMID27028280
George BJ
; Beasley TM
; Brown AW
; Dawson J
; Dimova R
; Divers J
; Goldsby TU
; Heo M
; Kaiser KA
; Keith SW
; Kim MY
; Li P
; Mehta T
; Oakes JM
; Skinner A
; Stuart E
; Allison DB
Obesity (Silver Spring)
2016[Apr]; 24
(4
): 781-90
PMID27028280
show ga
This review identifies 10 common errors and problems in the statistical analysis,
design, interpretation, and reporting of obesity research and discuss how they
can be avoided. The 10 topics are: 1) misinterpretation of statistical
significance, 2) inappropriate testing against baseline values, 3) excessive and
undisclosed multiple testing and "P-value hacking," 4) mishandling of clustering
in cluster randomized trials, 5) misconceptions about nonparametric tests, 6)
mishandling of missing data, 7) miscalculation of effect sizes, 8) ignoring
regression to the mean, 9) ignoring confirmation bias, and 10) insufficient
statistical reporting. It is hoped that discussion of these errors can improve
the quality of obesity research by helping researchers to implement proper
statistical practice and to know when to seek the help of a statistician.