2023
Hyperthyroidism in Danish Pregnant Women During a 20-Year Period
Torp N, Liew Z, Carlé A, Karmisholt J, Pedersen I, Andersen S, Andersen S. Hyperthyroidism in Danish Pregnant Women During a 20-Year Period. The Journal Of Clinical Endocrinology & Metabolism 2023, 109: e370-e378. PMID: 37437100, DOI: 10.1210/clinem/dgad410.Peer-Reviewed Original ResearchConceptsDanish pregnant womenOccurrence of hyperthyroidismAntithyroid drugsPregnant womenBiochemical hyperthyroidismMandatory iodine fortification programmeNationwide register-based cohortUse of ATDsRegister-based cohortIodine fortification programGeneral Danish populationNationwide cohortAutoimmune hyperthyroidismMaternal useOdds ratioTime-related differencesHyperthyroidismBirth cohortClinical concernBaseline levelsDanish populationFortification programsPregnancyCohortYoung individuals
2019
Perfluoroalkyl Substances and thyroid hormones in early pregnancy; findings in the Danish National Birth Cohort (DNBC)
Z L, K I, B R, S A, C R, B H, B B, T H, E B, J O. Perfluoroalkyl Substances and thyroid hormones in early pregnancy; findings in the Danish National Birth Cohort (DNBC). Environmental Epidemiology 2019, 3: 240-240. DOI: 10.1097/01.ee9.0000608512.83637.07.Peer-Reviewed Original ResearchUse of Negative Control Exposure Analysis to Evaluate Confounding: An Example of Acetaminophen Exposure and Attention-Deficit/Hyperactivity Disorder in Nurses’ Health Study II
Liew Z, Kioumourtzoglou MA, Roberts AL, O’Reilly É, Ascherio A, Weisskopf MG. Use of Negative Control Exposure Analysis to Evaluate Confounding: An Example of Acetaminophen Exposure and Attention-Deficit/Hyperactivity Disorder in Nurses’ Health Study II. American Journal Of Epidemiology 2019, 188: 768-775. PMID: 30923825, PMCID: PMC6438812, DOI: 10.1093/aje/kwy288.Peer-Reviewed Original ResearchConceptsAttention-deficit/hyperactivity disorderHealth Study II cohortMaternal acetaminophen useHealth Study IIAcetaminophen useAcetaminophen exposureNurses' Health Study II cohortNurses' Health Study IIPrenatal acetaminophen exposureHyperactivity disorderChildhood attention-deficit/hyperactivity disorderTime of pregnancyExposure periodBiennial questionnairesMaternal useObservational studyDrug safetyStudy IIPrior reportsExposure approachPregnancyAcetaminophenCohortChildrenAssociation
2018
How to investigate and adjust for selection bias in cohort studies
Nohr EA, Liew Z. How to investigate and adjust for selection bias in cohort studies. Acta Obstetricia Et Gynecologica Scandinavica 2018, 97: 407-416. PMID: 29415329, DOI: 10.1111/aogs.13319.Peer-Reviewed Original ResearchConceptsCohort studyDanish National Birth CohortSelection biasLong-term followNational Birth CohortLongitudinal cohort studyCase-control studySubsequent follow upsExposure-outcome associationsTraditional epidemiological approachesPreventable causeFollow-upInverse probability weightingBirth cohortInitial participation rateStudy designEpidemiological approachLimited dataCohortDiseaseBias analysisProbability weightingParticipation ratesParticipantsLess disease
2015
Bias from conditioning on live birth in pregnancy cohorts: an illustration based on neurodevelopment in children after prenatal exposure to organic pollutants
Liew Z, Olsen J, Cui X, Ritz B, Arah OA. Bias from conditioning on live birth in pregnancy cohorts: an illustration based on neurodevelopment in children after prenatal exposure to organic pollutants. International Journal Of Epidemiology 2015, 44: 345-354. PMID: 25604449, PMCID: PMC4339763, DOI: 10.1093/ije/dyu249.Peer-Reviewed Original ResearchConceptsAttention-deficit/hyperactivity disorderLive birthsPrenatal exposurePregnancy cohortFetal lossDanish National Birth CohortLong-term health outcomesNational Birth CohortWeak inverse associationEarly fetal lossPerfluoroalkyl substancesPregnancy lossSchool-aged childrenInverse associationFetal survivalCommon causeObservational studyBirth cohortHealth outcomesHuman fecundityCohortHyperactivity disorderBirthOutcomesNeurodevelopment
2014
Prenatal Exposure to Perfluoroalkyl Substances and the Risk of Congenital Cerebral Palsy in Children
Liew Z, Ritz B, Bonefeld-Jørgensen EC, Henriksen TB, Nohr EA, Bech BH, Fei C, Bossi R, von Ehrenstein OS, Streja E, Uldall P, Olsen J. Prenatal Exposure to Perfluoroalkyl Substances and the Risk of Congenital Cerebral Palsy in Children. American Journal Of Epidemiology 2014, 180: 574-581. PMID: 25139206, DOI: 10.1093/aje/kwu179.Peer-Reviewed Original ResearchMeSH KeywordsAdultAlkanesulfonic AcidsCaprylatesCase-Control StudiesCerebral PalsyCohort StudiesDenmarkEndocrine DisruptorsEnvironmental MonitoringEnvironmental PollutantsFemaleFluorocarbonsHumansInfant, NewbornMaleMaternal AgeOdds RatioPregnancyPrenatal Exposure Delayed EffectsSex DistributionSex FactorsYoung AdultConceptsCongenital cerebral palsyPrenatal exposureCerebral palsyDanish National Birth CohortCerebral Palsy RegisterNational Birth CohortFetal brain developmentDose-response patternCase-cohort designPerfluoroalkyl substancesLiveborn singletonsMaternal levelsRisk ratioHigh riskCP casesCP riskBirth cohortMaternal plasmaBrain developmentPalsyPerfluorooctane sulfonateRiskPFAS levelsCohortPerfluorooctanoic acid