Double-counting of effect sizes and inappropriate exclusion of studies in "The influence of vitamin D supplementation on IGF-1 levels in humans: A systematic review and meta-analysis"
Challenges double-counted effect sizes and excluded studies in a meta-analysis of vitamin D supplementation and insulin-like growth factor 1.
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Publication details
Research themes
Statistical rigorNutrition & aging
Author affiliations & identifiers
- Mojgan Amiri: Department of Epidemiology, Erasmus University Medical Center, Rotterdam, The Netherlands.
- Hamidreza Raeisi-Dehkordi: Nutrition and Food Security Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran; Department of Nutrition, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. Electronic address: hamidreza92nut@gmail.com.
- Colby J Vorland: Department of Applied Health Sciences, Indiana University School of Public Health-Bloomington, Bloomington, Indiana, USA.
- Xiwei Chen: Department of Epidemiology and Biostatistics, Indiana University School of Public Health-Bloomington, Bloomington, Indiana, USA.
- Andrew W Brown: Department of Applied Health Sciences, Indiana University School of Public Health-Bloomington, Bloomington, Indiana, USA.
- David B Allison: Department of Epidemiology and Biostatistics, Indiana University School of Public Health-Bloomington, Bloomington, Indiana, USA.