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Effect of the exposure to maternal smoking during pregnancy and childhood on the body mass index until adolescence.

Muraro AP, Gonçalves-Silva RM, Ferreira MG, Silva GA, Sichieri R - Rev Saude Publica (2015)

Bottom Line: METHODS A population-based cohort of children (0-5 years old) from Cuiabá, Midwest Brazil, was assessed in 1999-2000 (n = 2,405).RESULTS Only 11.3% of the mothers reported smoking during pregnancy, but most of them (78.2%) also smoked during early childhood.Among mothers who smoked only during pregnancy (n = 59), 97.7% had smoked only in the first trimester.

View Article: PubMed Central - PubMed

Affiliation: Instituto de Saúde Coletiva, Universidade Federal de Mato Grosso, Cuiabá, MT, Brasil.

ABSTRACT
OBJECTIVE Investigate the effect of exposure to smoking during pregnancy and early childhood on changes in the body mass index (BMI) from birth to adolescence. METHODS A population-based cohort of children (0-5 years old) from Cuiabá, Midwest Brazil, was assessed in 1999-2000 (n = 2,405). Between 2009 and 2011, the cohort was re-evaluated. Information about birth weight was obtained from medical records, and exposure to smoking during pregnancy and childhood was assessed at the first interview. Linear mixed effects models were used to estimate the association between exposure to maternal smoking during pregnancy and preschool age, and the body mass index of children at birth, childhood and adolescence. RESULTS Only 11.3% of the mothers reported smoking during pregnancy, but most of them (78.2%) also smoked during early childhood. Among mothers who smoked only during pregnancy (n = 59), 97.7% had smoked only in the first trimester. The changes in body mass index at birth and in childhood were similar for children exposed and those not exposed to maternal smoking. However, from childhood to adolescence the rate of change in the body mass index was higher among those exposed only during pregnancy than among those who were not exposed. CONCLUSIONS Exposure to smoking only during pregnancy, especially in the first trimester, seems to affect changes in the body mass index until adolescence, supporting guidelines that recommend women of childbearing age to stop smoking.

No MeSH data available.


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Mentions: Data on birth length and weight were obtained from hospital records; other parameters of the child at ages between zero and five years old (preschool age) and between 10 and 17 years of age were measured or assessed using questionnaires applied by the researchers. At adolescence, data collection was carried out from October 2009 to August 2011 in Cuiabá, Várzea Grande (city geographically and economically integrated to Cuiabá), and 17 other cities in the state of Mato Grosso near the capital, and five Brazilian capitals (Campo Grande, MS; Brasilia, DF; Sao Paulo, SP; Rio de Janeiro, RJ; and Goiania, GO). Figure 1 shows that, from all children evaluated at preschool age (2,405), 0.4% with disabling health conditions were excluded from the interview, the parents or guardians of 2.9% have not authorized their participation in the survey, 2.6% did not come to school on the three attempts to measure them, 0.2% adolescents refused to participate, and 9.0% adolescents could not be evaluated due, for example, to living in distant cities.


Effect of the exposure to maternal smoking during pregnancy and childhood on the body mass index until adolescence.

Muraro AP, Gonçalves-Silva RM, Ferreira MG, Silva GA, Sichieri R - Rev Saude Publica (2015)

Flow chart of study population.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4544362&req=5

f01: Flow chart of study population.
Mentions: Data on birth length and weight were obtained from hospital records; other parameters of the child at ages between zero and five years old (preschool age) and between 10 and 17 years of age were measured or assessed using questionnaires applied by the researchers. At adolescence, data collection was carried out from October 2009 to August 2011 in Cuiabá, Várzea Grande (city geographically and economically integrated to Cuiabá), and 17 other cities in the state of Mato Grosso near the capital, and five Brazilian capitals (Campo Grande, MS; Brasilia, DF; Sao Paulo, SP; Rio de Janeiro, RJ; and Goiania, GO). Figure 1 shows that, from all children evaluated at preschool age (2,405), 0.4% with disabling health conditions were excluded from the interview, the parents or guardians of 2.9% have not authorized their participation in the survey, 2.6% did not come to school on the three attempts to measure them, 0.2% adolescents refused to participate, and 9.0% adolescents could not be evaluated due, for example, to living in distant cities.

Bottom Line: METHODS A population-based cohort of children (0-5 years old) from Cuiabá, Midwest Brazil, was assessed in 1999-2000 (n = 2,405).RESULTS Only 11.3% of the mothers reported smoking during pregnancy, but most of them (78.2%) also smoked during early childhood.Among mothers who smoked only during pregnancy (n = 59), 97.7% had smoked only in the first trimester.

View Article: PubMed Central - PubMed

Affiliation: Instituto de Saúde Coletiva, Universidade Federal de Mato Grosso, Cuiabá, MT, Brasil.

ABSTRACT
OBJECTIVE Investigate the effect of exposure to smoking during pregnancy and early childhood on changes in the body mass index (BMI) from birth to adolescence. METHODS A population-based cohort of children (0-5 years old) from Cuiabá, Midwest Brazil, was assessed in 1999-2000 (n = 2,405). Between 2009 and 2011, the cohort was re-evaluated. Information about birth weight was obtained from medical records, and exposure to smoking during pregnancy and childhood was assessed at the first interview. Linear mixed effects models were used to estimate the association between exposure to maternal smoking during pregnancy and preschool age, and the body mass index of children at birth, childhood and adolescence. RESULTS Only 11.3% of the mothers reported smoking during pregnancy, but most of them (78.2%) also smoked during early childhood. Among mothers who smoked only during pregnancy (n = 59), 97.7% had smoked only in the first trimester. The changes in body mass index at birth and in childhood were similar for children exposed and those not exposed to maternal smoking. However, from childhood to adolescence the rate of change in the body mass index was higher among those exposed only during pregnancy than among those who were not exposed. CONCLUSIONS Exposure to smoking only during pregnancy, especially in the first trimester, seems to affect changes in the body mass index until adolescence, supporting guidelines that recommend women of childbearing age to stop smoking.

No MeSH data available.


Related in: MedlinePlus