2023
Season of Conception and Risk of Cerebral Palsy
Zhuo H, Ritz B, Warren J, Liew Z. Season of Conception and Risk of Cerebral Palsy. JAMA Network Open 2023, 6: e2335164. PMID: 37738049, PMCID: PMC10517373, DOI: 10.1001/jamanetworkopen.2023.35164.Peer-Reviewed Original ResearchConceptsCerebral palsySeason of conceptionCalifornia birth recordsCohort studyPreterm birthRelative riskBirth recordsRisk of CPStatewide cohort studyEtiological risk factorsHigher Social Vulnerability IndexLength of gestationDiagnostic recordsNeighborhood-level factorsSummer conceptionsRisk factorsStratified analysisLive birthsMAIN OUTCOMEHigh riskCP riskPoisson regressionCP statusDevelopmental servicesNeuromotor disabilitiesExposure to per- and polyfluoroalkyl substances in early pregnancy and risk of cerebral palsy in children
Vilhelmsson A, Rylander L, Jöud A, Lindh C, Mattsson K, Liew Z, Guo P, Ritz B, Källén K, Thacher J. Exposure to per- and polyfluoroalkyl substances in early pregnancy and risk of cerebral palsy in children. The Science Of The Total Environment 2023, 899: 165622. PMID: 37474063, DOI: 10.1016/j.scitotenv.2023.165622.Peer-Reviewed Original ResearchConceptsOdds ratioPreterm infantsEarly pregnancyPerfluorononanoic acidPrenatal PFAS exposureMaternal serum concentrationsCerebral palsy casesConfidence intervalsCase-control studyRisk of CPEnvironmental risk factorsPositive associationContinuous variablesHigh PFASPalsy casesBirth RegistryPreterm controlsCerebral palsyLifestyle factorsPreterm casesUnexplained etiologyPrenatal exposureSerum concentrationsRisk factorsPerfluorooctane sulfonate
2022
Parental Age and Childhood Risk for Cerebral Palsy in California
Zhou L, Meng Q, von Ehrenstein O, Xiao J, Gao Y, Wu Y, Ritz B, Liew Z. Parental Age and Childhood Risk for Cerebral Palsy in California. The Journal Of Pediatrics 2022, 255: 147-153.e6. PMID: 36372095, PMCID: PMC10121738, DOI: 10.1016/j.jpeds.2022.10.039.Peer-Reviewed Original ResearchConceptsCerebral palsyPaternal ageGreater riskPreterm birthMaternal ageParental ageRisk of CPYoung maternal ageBirth certificate recordsCase-control studyTime of deliveryChildren of mothersOlder paternal ageCP diagnosisPreterm deliveryOffspring riskCertificate recordsCP casesCP riskSingleton controlsAge 20Older mothersAge 25Older ageChildhood risk