Maternal smoking in successive pregnancies and recurrence of low birthweight: the 2004 Pelotas birth cohort study, Brazil

Sclowitz, Iândora Krolow Timm; Santos, Iná S.; Domingues, Marlos Rodrigues; Matijasevich, Alícia; Barros, Aluísio J. D.

doi:10.1590/s0102-311x2013000100015

Cited by 7 publications

(7 citation statements)

References 30 publications

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“…The pathophysiology underlying these recurrent and heterogeneous pregnancy complications likely involves intrinsic and extrinsic (environmental) influences. Of the potentially modifiable environmental factors there is evidence for a variable role of maternal smoking, inter-pregnancy interval, socioeconomic status and quality of antenatal care [ 14 – 17 ]. Maternal BMI has a profound impact on pregnancy outcome [ 18 , 19 ], and previous analyses show that inter-pregnancy weight change in both directions variously alters the incident or primary risk of experiencing a range of pregnancy complications at the second pregnancy including hypertensive disease, stillbirth, premature delivery, extremes of placental weight, SGA and large for gestational age (LGA) birth [ 3 , 20 – 25 ].…”

Section: Introductionmentioning

confidence: 99%

Inter-Pregnancy Weight Change and the Risk of Recurrent Pregnancy Complications

et al. 2016

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Women with specific adverse pregnancy outcomes in their first pregnancy may be receptive to inter-pregnancy weight management guidance aimed at preventing these complications reoccurring in subsequent pregnancies. Thus the association between inter-pregnancy weight change and the risk of recurrent pregnancy complications at the second pregnancy was investigated in a retrospective cohort study of 24,520 women with their first-ever and second consecutive deliveries in Aberdeen using logistic regression. Compared with women who were weight stable, weight loss (>2BMI units) between pregnancies was associated with an increased risk of recurrent small for gestational age (SGA) birth and elective Cesarean-section, and was protective against recurrent pre-eclampsia, placental oversize and large for gestational age (LGA) birth. Conversely weight gain (>2BMI units) between pregnancies increased the risk of recurrent gestational hypertension, placental oversize and LGA birth and was protective against recurrent low placental weight and SGA birth. The relationships between weight gain, and placental and birth weight extremes were evident only in women with a healthy weight at first pregnancy (BMI<25units), while that between weight gain and the increased risk of recurrent gestational hypertension was largely independent of first pregnancy BMI. No relationship was detected between inter-pregnancy weight change and the risk of recurrent spontaneous preterm delivery, labour induction, instrumental delivery, emergency Cesarean-section or postpartum hemorrhage. Therefor inter-pregnancy weight change impacts the risk of recurrent hypertensive disorders, SGA and LGA birth and women with a prior history of these specific conditions may benefit from targeted nutritional advice to either lose or gain weight after their first pregnancy.

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Section: Introductionmentioning

confidence: 99%

Inter-Pregnancy Weight Change and the Risk of Recurrent Pregnancy Complications

et al. 2016

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“…The highest percentages of smoking frequency reduction between the first and second trimesters of pregnancy may occur, partially, due to late acknowledgement of pregnancy. Smoking cessation was more frequent before and in the pregnancy onset, which is a positive result, considering significant benefits for the fetal development with the early cessation of the smoking habit [ 10 ]. There are not many studies on smoking cessation in pregnant women in Brazil.…”

Section: Discussionmentioning

confidence: 99%

“…Many negatives outcomes for smoking pregnant women have been observed, such as spontaneous abortion, ectopic pregnancy, infertility [ 3 , 7 , 8 ], gestational and post gestational complications [ 5 ], incidence and recurrence of births of small for gestational age [ 4 , 9 ], low birth weight, preterm birth [ 3 , 10 ], and risk factors for cardiovascular disease in young adults [ 11 ]. Smoking is the most important preventable risk factor and has greater impact concerning complications during pregnancy and labor [ 3 , 7 ].…”

Section: Introductionmentioning

confidence: 99%

“…Results obtained from cost-benefit analyses in promoting smoking cessation during pregnancy were found to be better than in the population in general. This is partially explained due to the additional incentive concerning the child’s health [ 10 ]. The effectiveness of a smoking cessation program conducted in Denmark was similar between pregnant and no pregnant women, except for the subgroup of young smokers with disadvantages regarding schooling and employment.…”

Section: Introductionmentioning

confidence: 99%

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Smoking prevalence, reduction, and cessation during pregnancy and associated factors: a cross-sectional study in public maternities, Rio de Janeiro, Brazil

et al. 2015

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BackgroundSmoking epidemic in Brazilian women has later onset, smaller magnitude, and slower decreasing trend, compared to men. Among pregnant women, smoking has an additional deleterious effect. The purpose of this study was to analyze smoking prevalence during pregnancy and associated factors, and to describe the frequency of smoking reduction and cessation in public maternities of Rio de Janeiro State, southeastern Brazil, in 2011.MethodsA cross-sectional study was conducted in two maternities located at public hospitals in two cities of the Rio de Janeiro state, Niterói (maternity A) and of Rio de Janeiro (maternity B). Data were gathered by interviews 12 hours after the delivery, and analyses of prenatal cards and medical records. Smoking prevalence according to maternal characteristics, adequacy of prenatal care, and proportions of smoking reduction and cessation during pregnancy were calculated. Factors associated to smoking during pregnancy were estimated by logistic regression analysis.ResultsSmoking prevalence at maternity A (24.8%, 95% CI: 21.1-29.0) and maternity B (17.9%, 95% CI: 15.8-20.1) were high. Prevalence rates were greater in women aged 20-34 years, mainly without partner, multiparous and brown or black skin color. Low education (OR = 2.14, 95% CI 1.21, 3.79) and multiparity (OR = 3.48, 95% CI 1.78, 6.81), at maternity A; adolescence (OR = 0.44, 95% CI 0.26, 0.75), black skin color (OR = 1.71, 95% CI 1.06, 2.74), low education (OR = 1.61, 95% CI 1.08, 2.40), and multiparity (OR = 1.58, 95% CI 1.03, 2.44), at maternity B, were associated with smoking in multivariable analysis. Adequacy of prenatal care and smoking prevalence showed an inverse association. More than half of the smokers kept the smoking habits during pregnancy. Reduction occurred mainly between the 1st and 2nd trimesters of pregnancy.ConclusionSmoking prevalence during pregnancy was higher for multiparous and less educated women. Population and individual strategies for smoking prevention and control must include actions specific for women, especially during the reproductive period.

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“…We identified a set of determinants of LBW based on previous literature and assessed their potential role as confounders in the multivariable statistical models. These covariates included maternal age [25,26], gender [27,28], family socioeconomic status [29,30], maternal smoking during pregnancy [31,32], environmental tobacco smoke exposure [33,34], and marital status [35,36]. In the twopollutant models, we also adjusted for the other pollutants.…”

Section: Covariatesmentioning

confidence: 99%

Effects of Air Pollution on the Risk of Low Birth Weight in a Cold Climate

Balogun¹,

Rantala²,

Antikainen³

et al. 2020

Preprint

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There is accumulating evidence that prenatal exposure to air pollution disturbs fetal growth and development, but little is known about these effects in cold climates or their season-specific or joint effects. Our objective was to assess independent and joint effects of prenatal exposure to specific air pollutants on the risk of low birth weight (LBW). We utilized the 2568 children of the Espoo Cohort Study, born between 1984 and 1990, and living in the City of Espoo. We conducted stratified analyses for births during warm and cold seasons separately. We analyzed the effect estimates using multi-pollutant Poisson regression models with risk ratio (RR) as the measure of effect. The risk of LBW was related to exposure to CO and (adjusted RR 1.44, 95% CI: 1.04-2.00) and exposure to O3 in the spring-summer season (1.82, 1.11-2.96). There was also evidence of synergistic effects between CO and O3 (relative risk due to interaction, RERI, all year 1.08, 95% CI: 0.27-4.94, spring-summer 3.97, 2.17-25.85) and PM2.5 and O3 (all year 0.72, -0.07-3.60, spring-summer 2.80, 1.36-19.88). We present new evidence of both independent and joint effects of prenatal exposure in a cold climate on the risk of LBW at low levels of air pollution.

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Maternal smoking in successive pregnancies and recurrence of low birthweight: the 2004 Pelotas birth cohort study, Brazil

Cited by 7 publications

References 30 publications

Inter-Pregnancy Weight Change and the Risk of Recurrent Pregnancy Complications

Inter-Pregnancy Weight Change and the Risk of Recurrent Pregnancy Complications

Smoking prevalence, reduction, and cessation during pregnancy and associated factors: a cross-sectional study in public maternities, Rio de Janeiro, Brazil

Effects of Air Pollution on the Risk of Low Birth Weight in a Cold Climate

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