Maternal exposure to benzene and toluene and preterm birth. A longitudinal study
São Paulo med. j
;
137(6): 486-490, Nov.-Dec. 2019. tab
Article
in English
| LILACS
| ID: biblio-1094524
ABSTRACT
ABSTRACT BACKGROUND:
Exposure to air pollutants has several effects on human health, including during pregnancy.OBJECTIVE:
To identify whether exposure to benzene and toluene among pregnant women contributes to preterm delivery. DESIGN ANDSETTING:
Longitudinal study using data on newborns from mothers living in São José dos Campos (SP) in 2016, who had been exposed to benzene and toluene.METHODS:
A logistic regression model with three hierarchical levels was constructed using maternal variables relating to newborns, and using benzene and toluene concentrations in quartiles. Occurrences of cesarean births, twins or malformations were excluded. Maternal exposure windows of 5, 10, 15, 30, 60 and 90 days prior to delivery were considered.RESULTS:
Out of the 9,562 live births, 3,671 newborns were included and 343 newborns were born at less than 37 weeks of gestation (9.3%). The average birth weight was 3,167.2 g. Exposure to benzene and toluene was significantly associated (P = 0.04) with preterm delivery in the five-day window. There was no association in any of the other exposure windows.CONCLUSIONS:
It was possible to identify that maternal exposure to benzene and toluene has an acute effect on preterm delivery.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Toluene
/
Benzene
/
Maternal Exposure
/
Premature Birth
Type of study:
Etiology study
/
Observational study
/
Prognostic study
/
Risk factors
Limits:
Adult
/
Female
/
Humans
/
Male
/
Infant, Newborn
/
Pregnancy
Language:
English
Journal:
São Paulo med. j
Journal subject:
Cirurgia Geral
/
Cincia
/
Ginecologia
/
Medicine
/
Medicina Interna
/
Obstetr¡cia
/
Pediatria
/
Sa£de Mental
/
Sa£de P£blica
Year:
2019
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Estadual de São Paulo/BR
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