2020
Accounting for urinary dilution in peri-implantation samples: implications for creatinine adjustment and specimen pooling
Rosen Vollmar AK, Johnson CH, Weinberg CR, Deziel NC, Baird DD, Wilcox AJ, Jukic AMZ. Accounting for urinary dilution in peri-implantation samples: implications for creatinine adjustment and specimen pooling. Journal Of Exposure Science & Environmental Epidemiology 2020, 31: 356-365. PMID: 32424331, PMCID: PMC7671945, DOI: 10.1038/s41370-020-0227-1.Peer-Reviewed Original ResearchConceptsCreatinine adjustmentCreatinine concentrationUrinary dilutionUrinary estrogen metabolitesEffect of pregnancyUrinary creatinine concentrationCreatinine levelsWeeks' gestationEarly pregnancyCreatinine excretionEstrogen metabolitesCreatinine measuresUrine specimensPooled measureBiomarker measurementsPooled specimensEnvironmental exposuresExposure measuresLinear mixed modelsBiomonitoring resultsPregnancyT-testKappa coefficientMixed modelsPerson sample
2019
Normalizing Untargeted Periconceptional Urinary Metabolomics Data: A Comparison of Approaches
Vollmar A, Rattray NJW, Cai Y, Santos-Neto ÁJ, Deziel NC, Jukic AMZ, Johnson CH. Normalizing Untargeted Periconceptional Urinary Metabolomics Data: A Comparison of Approaches. Metabolites 2019, 9: 198. PMID: 31546636, PMCID: PMC6835889, DOI: 10.3390/metabo9100198.Peer-Reviewed Original ResearchUrinary metabolomics dataKidney functionOrthogonal partial least squares discriminant analysisUntargeted mass spectrometry-based metabolomics analysisCreatinine adjustmentUrine samplesMetabolomic analysisEarly-life exposomeMass spectrometry-based metabolomics analysisTime of conceptionSpecific gravity adjustmentCritical developmental windowMaternal urineEarly pregnancyPericonceptional periodUrinary concentrationsPost-implantation samplesUrinary dilutionUntargeted metabolomics analysisUrine concentrationsUnsupervised principal component analysisStudy objectiveDevelopmental windowMetabolomics dataMetabolomics studies