We have read with great interest the accepted manuscript of the meta-analysis performed by Huang, et al. titled: „A functional polymorphism rs10830963 in melatonin receptor 1B associated with the risk of gestational diabetes mellitus” published online in the 2019 December 6 issue of Bioscience Reports [1]. We do agree with the authors’ final conclusion that such a meta-analysis should eventually confirm that the MTNR1B rs10830963 G allele is significantly associated with increased risk of gestational diabetes mellitus (GDM) development in pregnant populations with Asian and European ancestry. However we have surprisingly found that our genetic association study [2] was included in this meta-analysis, but with mistakenly calculated odds ratios (OR).  Therefore we would suggest to use the correct OR values based on our original publication that were already indicating a high genetic effect size for the MTNR1B rs10830963 risk variant on GDM development.

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