DSpace JSPUI


DSpace preserves and enables easy and open access to all types of digital content including text, images, moving images, mpegs and data sets

Learn More

Please use this identifier to cite or link to this item: http://repositorio.insp.mx:8080/jspui/handle/20.500.12096/8022
Full metadata record
DC FieldValueLanguage
dc.coverage.spatialnacional
dc.creatorTéllez Rojo, Martha
dc.date.accessioned2022-02-16T04:24:31Z-
dc.date.available2022-02-16T04:24:31Z-
dc.date.issued2019
dc.identifier.urisicabi.insp.mx:2019-None
dc.identifier.urihttps://reader.elsevier.com/reader/sd/pii/S0160412018325893?token=8CD08014869FB12C514EA1414C836834A1C7770A839D5DA8233CB0D3CE5C309C9C08DC64E064C028F8FD9892F5BEBBDB
dc.identifier.urihttps://www.doi.org/10.1016/j.envint.2019.02.021
dc.identifier.urihttp://repositorio.insp.mx:8080/jspui/handle/20.500.12096/8022-
dc.description.abstractPrevious studies have examined the association between blood lead levels and pubertal timing in adolescent girls; however, the evidence is lacking on the role of lead exposure during sensitive developmental periods on sexual maturation. S: To examine the association of prenatal and early childhood lead exposure with pubertal stages among 264 boys and 283 girls aged 9.8-18.0 years in Mexico City. METHODS: We measured maternal bone lead (a proxy for cumulative fetal exposure to lead from maternal bone stores mobilized during pregnancy) at 1 month postpartum. Blood lead was measured annually from 1 to 4 years. Pubertal stage was assessed by a pediatrician. We examined the association between lead and pubertal stages of breast, pubic hair and genitalia using ordinal regression. Age at menarche was evaluated using Cox proportional-hazard models. RESULTS: Multivariate models showed that maternal patella lead and early childhood blood lead were inversely associated with breast growth (patella OR = 0.72, 95% CI: 0.51-1.00; blood OR = 0.70, 95% CI: 0.53-0.93) in girls. Girls with maternal patella lead in the 3rd tertile and child blood lead in the 2nd tertile had a later age at menarche compared with girls in the 1st tertile (patella HR = 0.60, 95% CI: 0.41-0.88; blood HR = 0.65, 95% CI 0.46-0.91). Additionally, early childhood blood lead was negatively associated with pubic hair growth (OR = 0.68, 95% CI: 0.51-0.90) in girls. No associations were found in boys. CONCLUSIONS: These data suggest that higher prenatal and early childhood exposure to lead may be associated with delayed pubertal development in girls but not boys. Our findings are consistent with previous analyses and reinforce the reproductive effects of lead for girls. Copyright © 2019 The Authors. Published by Elsevier Ltd.. All rights reserved.
dc.formatpdf
dc.languagespa
dc.publisherESPM INSP
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.subjectAdolescentBone and BoneschemistryChildEnvironmental ExposureEnvironmental PollutantsbloodEnvironmental Pollutantsmetabolism,FemaleHumansLeadbloodLeadmetabolism,Longitudinal StudiesMaleMaternal ExposureMenarchedrug effectsMexicoMothersPregnancyPrenatal Exposure Delayed EffectsPubertydrug effectsSexual Maturationdrug effects,SD
dc.titleEarly lead exposure and pubertal development in a Mexico City population
dc.typeinfo:eu-repo/semantics/article
dc.subject.ctiinfo:eu-repo/classification/cti/3
dc.creator.orcidorcid/0000-0003-3322-3334;Téllez Rojo, Martha
Appears in Collections:Artículos

Files in This Item:
There are no files associated with this item.


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.