SummaryBackgroundBreastfeeding has clear short-term benefits, but its long-term consequences on human capital are yet to be established. We aimed to assess whether breastfeeding duration was associated with intelligence quotient (IQ), years of schooling, and income at the age of 30 years, in a setting where no strong social patterning of breastfeeding exists.MethodsA prospective, population-based birth cohort study of neonates was launched in 1982 in Pelotas, Brazil. Information about breastfeeding was recorded in early childhood. At 30 years of age, we studied the IQ (Wechsler Adult Intelligence Scale, 3rd version), educational attainment, and income of the participants. For the analyses, we used multiple linear regression with adjustment for ten confounding variables and the G-formula.FindingsFrom June 4, 2012, to Feb 28, 2013, of the 5914 neonates enrolled, information about IQ and breastfeeding duration was available for 3493 participants. In the crude and adjusted analyses, the durations of total breastfeeding and predominant breastfeeding (breastfeeding as the main form of nutrition with some other foods) were positively associated with IQ, educational attainment, and income. We identified dose-response associations with breastfeeding duration for IQ and educational attainment. In the confounder-adjusted analysis, participants who were breastfed for 12 months or more had higher IQ scores (difference of 3·76 points, 95% CI 2·20–5·33), more years of education (0·91 years, 0·42–1·40), and higher monthly incomes (341·0 Brazilian reals, 93·8–588·3) than did those who were breastfed for less than 1 month. The results of our mediation analysis suggested that IQ was responsible for 72% of the effect on income.InterpretationBreastfeeding is associated with improved performance in intelligence tests 30 years later, and might have an important effect in real life, by increasing educational attainment and income in adulthood.FundingWellcome Trust, International Development Research Center (Canada), CNPq, FAPERGS, and the Brazilian Ministry of Health.

Objective

ObjectiveTo assess the prevalence of postpartum depression and associated factors. MethodsThe study was carried out in Pelotas, a city in the Southern region of Brazil, between October and November 2000. Mothers (n=410) were interviewed in the hospital using two questionnaires on obstetric and psychosocial data. Later, these mothers were visited at home, within 30 to 45 days after delivery. Occurrence of postpartum depressive symptoms was assessed by the Hamilton Scale for Depression. Chisquare test was used for comparison between proportions and non conditional logistic regression was utilized in the multivariate analysis. Data analysis was conducted hierarchically: economic variables in the first level, sociodemographic in the second level, the obstetrics variables in the third level and, in the fourth level, the psychosocial variables. ResultsThe prevalence of postpartum depression observed in this sample was 19.1%. Family income (OR=5.24; CI 95%: 2.00-13.69), preference as to the child's gender (boys: OR=3.49; CI 95%: 1.76-6.93) and thinking about interrupting the pregnancy (OR=2.52; CI 95%: 1.33-4.76), were variables associated with postpartum depression. ConclusionsThese results indicate that low economic status of the puerperal woman and nonacceptance of pregnancy are key elements in the development of postpartum depression.

Paternal PPD is a clinically meaningful phenomenon. Fathers should be evaluated for mood disorders in the postpartum, especially when their partner is depressed.

The findings indicate that maternal age, parity, primary caregiver status and duration of post-partum depression are associated with the language development of the child.

No abstract

OBJECTIVE:To assess the prevalence and factors associated to overweight and obesity in urban area adolescents. METHODS:A cross-sectional population-based study was carried out in the municipality of Pelotas, Southern Brazil, between 2001 and 2002. Adolescents between 15 and 18 years old were weighed, measured and asked to complete a self-administered questionnaire. Of 90 areas drawn, 86 dwellings were visited in each area, comprising a total of 960 adolescents interviewed. Overweight and obesity prevalences were defined based on the body mass index, according to cutoff values and adjusted to age and sex. Multivariate analysis with Poisson regression was performed using a hierarchical model of variables associated to overweight and obesity. RESULTS:Overweight and obesity prevalences were 20.9% and 5% respectively. There was found an inverse relationship between obesity and age and schooling. An association of overweight and obesity with reporting parents' obesity (p=0.03) and adolescents' sexual maturation (p=0.01) was seen. Dieting and skipping meals were associated to obesity with a risk of 3.98 (95% CI: 1.83-8.67) and 2.54 (95% CI: 1.22-5.29) respectively. CONCLUSIONS:Overweight and obesity prevalences in the area studied are of concern despite adolescents' behaviors to prevent to obesity. There is a need to implement more effective campaigns to provide better guidance to adolescents.

RESULTS:Prevalence of adolescents who reported alcoholic beverage consumption in the last month was 23.0% (95% CI: 20.4;25.4), prevalence was 21.7% among females and 24.2% among males. Prevalence of alcohol consumption at 11 years of age was 11.9%. In the multiple regression analysis, alcoholic beverage use by male adolescents was higher among those who reported tobacco use in the last month, those who were older, and those who had already had sexual intercourse. Among female adolescents, age was the only variable associated with alcoholic beverage use. CONCLUSIONS:Alcoholic beverage use was prevalent in both sexes and began at a very early age. Smoking and previous sexual intercourse were also associated with this use. Preventive measures need to begin earlier, aiming to control alcohol use in the 11-to-15-year age group.