Research reproducibility and quality control has become an increasing concern in recent years and post-publication peer-review is one way to help address these concerns. In a joint letter to the editor of the journal Nutrition, Dr. Peng Li, statistician in the office of energetics; Dr. TaShauna U. Goldsby, postdoctoral fellow in the Nutrition Obesity Research Center (NORC); and Dr. David B. Allison, distinguished professor and director of the NORC and office of energetics, at the University of Alabama at Birmingham; along with Drs. Bartlomiej M. Zalewski, Anna Chmielewska, and Hania Szajewska, in the department of pediatrics at the Medical University of Warsaw, Poland; and Dr. Joyce K. Keithley, in the College of Nursing at Rush University Medical Center in Chicago, reported on their recent collaboration in addressing and correcting inaccuracies discovered in “The Effect of Glucomannan on Body Weight in Overweight or Obese Children and Adults: A Systematic Review of Randomized Controlled Trials” (published in March 2015 in Nutrition), using data from “Safety and Efficacy of Glucomannan for Weight Loss in Overweight and Moderately Obese Adults” (published in December 2013 in the Journal of Obesity). The UAB team detected the anomalies in the originally published meta-analysis and alerted the European team, and all then worked collaboratively to correct the error. It was found that themeta-analyticstatisticsre-computedwiththecorrecteddata resultedinsomechangesintheconclusions.For example, theeffectoftreatmentaftertwoweeksthatwasoriginallyreportedasstatisticallysignificantinthemeta-analysispublishedturnedouttobeinsignificantafterthecorrection.
“Correction of Data Errors and Reanalysis of ‘The Effect of Glucomannan on Body Weight in Overweight or Obese Children and Adults: A Systematic Review of Randomized Controlled Trials’ ” was published online in March 2015.
Journal article: http://www.nutritionjrnl.com/article/S0899-9007(15)00083-0/abstract