title: [Hypoacusis-deafness related to perinatal adverse conditions. According to the register available in a specialized unit of Ciudad de Mexico. Analysis according to birth weight].
abstract: OBJECTIVE
  To analyse perinatal adverse conditions related with birth weight in 160 children with hearing impairment-deafness (prelingual sensorineural hearing loss) according to medical data of a specialized medical unit in Mexico City.
  
  
  RESULTS
  The average age of children was 4 years old +/- 1.7; 61% were male. 47.5% of the cases had a birthweight between 1,500 and 2,900 g. 90 cases (56%) had an abnormal delivery and 68 (42.5%) were first pregnancy cases. A high number of cases had delayed breathing, cyanosis, jaundice or respiratory failure. 104 cases (65%) had deafness and 56 (35%) presented. hearing loss. Only 11% of the children had a birth-weight under 1,500 g. 58% of all cases had a birth weight lower than 3,000 g.
  
  
  CONCLUSIONS
  The quality of medical assistance provided during the perinatal period has a very important role in origin of hearing impairment--deafness in this group of children. It is important to increase our knowledge about the perinatal adverse conditions in order to establish preventive programs.
authors.affiliation: Maestra en Rehabilitación Neurológica, Instituto de la Comunicación Humana-CNR, Tlalpan, México. yolandapenaloza@hotmail.com
authors.forename: Y R
authors.initials: YR
authors.lastname: Peñazola-López
authors.forename: G
authors.initials: G
authors.lastname: Castillo-Maya
authors.forename: F
authors.initials: F
authors.lastname: García-Pedroza
authors.forename: H
authors.initials: H
authors.lastname: Sánchez-López
mesh_terms: D002391:Catchment Area, Health; D002675:Child, Preschool; D003638:Deafness / Q000453:epidemiology / Q000209:etiology*; D005260:Female; D034381:Hearing Loss / Q000453:epidemiology / Q000209:etiology*; D006801:Humans; D007230:Infant, Low Birth Weight; D007231:Infant, Newborn; D008297:Male; D008430:Maternal-Child Health Centers / Q000592:standards; D008800:Mexico; D015997:Neonatal Screening / Q000379:methods; D007744:Obstetric Labor Complications / Q000453:epidemiology; D011247:Pregnancy; D012042:Registries