Do socioeconomic factors explain why maternal smoking during pregnancy is more frequent in a more developed city of Brazil?

Socio-demographic and psychological features associated with smoking in pregnancy

Objective

To investigate how social and psychological characteristics differ between pregnant women who smoke and do not smoke. To explore associations between social and psychological features with changes of smoking habits by the end of pregnancy.

Methods

A case-control study was set up. Smokers cases were never-smokers and ex-smokers controls. Pregnant women (n=328) from public prenatal services were interviewed. Socio-demographic data and psychological variables – personality traits, anxiety, depression, perceived stress, maternal fetal-attachment - were measured. Saliva samples were collected to measure cotinine and to check self-informed smoking status. In addition, 66 smokers were also assessed regarding smoking habits by late pregnancy. Smoking status was defined as a dependent variable. Exposure factors were analyzed through odds ratios. Logistic models and contingency tables were employed according to the nature of variables. “Qualitative change in smoking” was defined as a dependent variable for the last evaluation, and a logistic regression model was built.

Results

Lower schooling, higher age, use of alcohol and drugs, living without a partner, and passive smoking showed associations with smoking. Anxiety, depression and perceived stress also exhibited positive association with smoking. Among personality traits, only Neuroticism was associated with smoking. None of the variables were associated with qualitative change in smoking by the end of pregnancy.

Conclusion

Smoking during pregnancy is associated with more unfavorable social conditions. Pregnant women who smoke exhibit more negative psychological states than nonsmokers, including a profile of accentuated Neuroticism. None of the investigated variables could predict changes in smoking during pregnancy.

Social Determinants of Cigarette Smoking among American Women during Pregnancy

Educational attainment is among the most substantial protective factors against cigarette smoking, including during pregnancy. Although Minorities’ Diminished Returns (MDRs) of educational attainment, defined as weaker protective effect of education for racial and ethnic minority groups compared to Non-Hispanic Whites, has been demonstrated in previous studies; such MDRs are not tested for cigarette smoking during pregnancy. To better understand the relevance of MDRs to tobacco use during pregnancy, this study had three aims: firstly, to investigate the association between educational attainment and cigarette smoking in pregnant women; secondly, to compare racial and ethnic groups for the association between educational attainment and cigarette smoking; and thirdly, to explore the mediating effect of poverty status on such MDRs, among American adults during pregnancy. This cross-sectional study explored a nationally representative sample of pregnant American women (n = 338), which was taken from the Population Assessment of Tobacco and Health (PATH; 2013). Current smoking was the outcome. Educational attainment was the independent variable. Region and age were the covariates. Poverty status was the mediator. Race and ethnicity were the effect modifiers. Overall, a higher level of educational attainment (OR = 0.54, p < 0.05) was associated with lower odds of current smoking among pregnant women. Race (OR = 2.04, p < 0.05) and ethnicity (OR = 2.12, p < 0.05) both showed significant interactions with educational attainment on smoking, suggesting that the protective effect of educational attainment against smoking during pregnancy is smaller for Blacks and Hispanics than Non-Hispanic Whites. Poverty status fully mediated the above interactions. In the United States, highly educated pregnant Black and Hispanic women remain at higher risk of smoking cigarettes, possibly because they are more likely to live in poverty, compared to their White counterparts. The results suggest the role that labor market discrimination has in explaining lower returns of educational attainment in terms of less cigarette smoking by racial and ethnic minority pregnant women.

Socio-environmental determinants of the delay in the first dental visit: results of two population-based cohort studies in Brazil

The objective of this study was to describe the timing of the first dental visit and investigate the association of socioeconomic and behavioral factors with dental visit delay among 10/11-year-old children from two live-birth population cohorts with extremely contrasting socioeconomic profiles. Follow-up data (2004-2005) from cohorts of Ribeirão Preto (RP) (n=790) and São Luís (SL) (n=673) were evaluated. Delay in dental visit was defined as not visiting a dentist before the age of 7. Covariates included family socioeconomic characteristics, mother-related health behavior, and child-related characteristics. Prevalence ratios with robust standard errors were estimated. In both cohorts, less than 5% of children had visited a dentist before the age of two and about 35% of them had not visited a dentist before the age of seven. Lower mother's schooling and lack of private health insurance were associated with the delay in first dental visit for both cohorts. A small number of mother's prenatal care visits and being from a single-father family or a family without parents were only associated in the RP cohort, while having ≥4 siblings and lifetime dental pain were associated in the SL cohort. The association with dental pain probably reveals a preventive care-seeking behavior. Therefore, the percentage of delayed first dental visit of children was very high even among those with the most educated mothers. Further studies are necessary to analyze recent changes and underlying factors related to access to first dental visit after the implementation of the National Oral Health Policy in 2006.

Prevalência e fatores associados ao hábito de fumar de gestantes na cidade de São Luís, Maranhão, Brasil

Objetivos:estimar a prevalência e investigar os fatores associados ao hábito de fumar de gestantes na cidade de São Luís, Maranhão.Métodos:estudo de corte seccional em amostra de 5212 gestantes assistidas em onze hospitais de São Luís em 2010. Informações sobre hábito de fumar e características socioeconômicas, demográficas, de saúde reprodutiva e hábitos de vida foram obtidos utilizando questionário padronizado. Estimativa da prevalência e cálculo de odds ratio (OR), com seus respectivos Intervalos de Confiança de 95% (IC95%), foram obtidos em um modelo de regressão logística. Os dados foram analisados no programa estatístico STATA 12.0.Resultados:a prevalência do hábito de fumar na gravidez foi 4,1% (IC95%:3,55-4,64). Os fatores associados ao hábito de fumar foram: ausência de religião (OR=1,58; IC95%:1,11-2,26); não ter companheiro (OR=1,66; IC95%:1,15-2,38); as categorias 2 a 4 partos (OR=2,25; IC95%:1,54-3,29) e cinco partos ou mais (OR=2,50; IC95%:1,23-5,05); 0 a 3 consultas pré-natais (OR=2,75; IC95%:1,74- 4,34); classe econômica D/E (OR=2,75; IC95%:1,22- 6,19); e consumo de álcool (OR=7,61; IC95%:5,50- 10,55).Conclusões:a prevalência do hábito de fumar foi baixa. Houve redução do tabagismo em São Luís de 5,9%, em 1997/98, para 4,1%, no presente estudo. É necessário que intervenções mais enfáticas sejam dirigidas às gestantes com os fatores de vulnerabilidade encontrados.

Disparities in prevalence of smoking and smoking cessation during pregnancy: a population-based study

Objective. To examine time trends in prevalence of smoking and smoking cessation during pregnancy by family income, maternal level of education, skin color, and age. Methods. We conducted three population-based surveys in 2007, 2010, and 2013 with newly delivered mothers living in the municipality of Rio Grande, Southern Brazil. Data were collected using questionnaires administered after delivery in all (two) maternity units in the city, at Dr. Miguel Riet Corrêa Júnior Hospital and at Santa Casa de Misericórdia. Time trends were analyzed using chi-square test for linear trend. Results. Data of 7,572 women showed that the prevalence of smoking before pregnancy decreased from 28% (26.2–29.7) in 2007 to 22% (20.8–24.0) in 2013 (P < 0.001). Prevalence of smoking during pregnancy decreased from 22% (20.4–23.7) in 2007 to 18% (16.6–19.5) in 2013 (P < 0.001). This reduction varied across income ranging from 17% (poorest) to 35% (richest) (P < 0.001). The lower the income, the higher the smoking prevalence during pregnancy. Smoking cessation was more prevalent among women of higher level of education and income. Conclusions. Smoking before and during pregnancy is still highly prevalent and the prevalence of cessation is low pointing to a need to strengthen actions targeting low-income, less educated, black pregnant women.

Ethnic differences in tobacco use during pregnancy: findings from a primary care sample in São Paulo, Brazil

OBJECTIVES

Tobacco use during pregnancy is a global health concern. To date the majority of research originates in developed countries, thus we have a need to better understand factors related to maternal health in developing countries. We examine the prevalence and correlates of smoking by ethnicity in a sample of pregnant primary care patients in São Paulo, Brazil.

DESIGN

Data were obtained from completed surveys during perinatal care visits in primary care clinics. We examine a sample of 811 pregnant women surveyed during 20-30 weeks of pregnancy. Multiple logistic regression was used to obtain odds ratios (OR) and 95% confidence intervals (95% CI).

RESULTS

We found significant ethnic differences in smoking during pregnancy. Compared to White women, Black women were more likely to use tobacco during pregnancy (OR: 1.95; 95% CI: 1.16-3.27). In the fully adjusted model, when accounting for common mental disorders, differences in smoking during pregnancy by ethnicity remained (OR: 1.96; 95% CI: 1.14-3.36).

CONCLUSIONS

There are ethnic differences in tobacco use during pregnancy. Clinical implications including universal screening for tobacco use during pregnancy and culturally relevant approaches to smoking cessation are suggested.

Examining life-course influences on chronic disease: the Ribeirão Preto and São Luís birth cohort studies (Brazil)

More than any other low- and middle-income country, Brazil has the longest research tradition of establishing, maintaining and exploiting birth cohort studies. This research pedigree is highlighted in the present issue of the Brazilian Journal of Medical and Biological Research, which contains a series of twelve papers from the Ribeirão Preto and São Luis birth cohort studies from the Southeast and Northeast of Brazil, respectively. The topics covered in this raft of reports vary and include predictors of perinatal health and maternal risk factors, early life determinants of cardiovascular risk factors in childhood and adolescence, use of health services, and a description of dietary characteristics of young adults, amongst other topics. There is also a guide to the background, objectives, sampling and protocols employed across these studies, which, together with similar pieces published in past issues of the Brazilian Journal, serve as a very useful starting point, particularly for potential collaborators. In the fervent hope that further follow-up of these cohorts will take place--we provide our own justification for cohort maintenance and extension in this issue--future data collection could include: genetic material, atherosclerosis, ascertained, for instance, by intima-media thickness, and IQ testing in children--scores from which are emerging as potentially important predictors of adult health outcomes up to six decades later.