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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 S; Kim MY; Li P; Mehta T; Oakes JM; Skinner A; Stuart E; Allison DB
Obesity (Silver Spring) 2016[Apr]; 24 (4): 781-90 PMID27028280show ga
We identify 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. We hope 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.