No association was found between periodontal disease in the mother and the low birth weight. An association between prematurity and periodontal pockets was found but it was confounded by maternal health variables.

The aim of this report is to describe general and methodological characteristics of a cohort study in southern Brazil (Coorte Brasil Sul), aimed at understanding the impact of the first 1,000 days of life on children's health. It is a cohort study involving all children born in 2009 and their families living in the municipality of Palhoça, State of Santa Catarina, Brazil. Face-to-face interviews with parents at home using a structured questionnaire and children's physical and clinical examinations at schools have been carried out. Crosssectional analyzes, longitudinal comparisons and hierarquical regression analysis will allow understanding if the first 1,000 days of life can influence on 6-year-old children's health. The Coorte Brasil Sul is in its retrospective phase together with the children's physical data collection. Preliminary data (n=1270) related to nutritional status point to a high prevalence of overweight (16.4%) and obesity (15.5%). With the continuity of the study, it is expected to evaluate if the first phases of life can influence health during adolescence and in adult life, mainly in relation to chronic diseases.

OBJECTIVE:To estimate the prevalence of preterm birth by categories of birth weight, and to obtain an equation to correct the estimates. METHODS:Systematic review of the Brazilian literature published from 1990 to 2012, to identify studies with primary collection of data on birth weight and gestational age. Twelve studies were selected and contributed for tabulations of preterm prevalence according to 100 g birth weight categories. These results were combined using sex-specific fractional polynomial equations and the resulting curves were compared with results from the Live Birth Information System for the years 2000, 2005, 2010 and 2011. RESULTS:For all birth weight categories, preterm prevalence estimates based on primary studies had a higher prevalence than those of the the Live Birth Information System. The prevalence reported by the Live Birth Information System was of 7.2% in 2010, about 38.0% lower than the estimated prevalence of 11.7% obtained with the correctional equation. CONCLUSIONS:Information reported by the Live Birth Information System on preterm prevalence does not reflect the true magnitude of the problem in Brazil, and should not be used without the correction factors proposed in the present analyses.

ResumoIntrodução: A cárie dentária na adolescência continua sendo um importante problema de saúde pública; entretanto, a sua relação com os fatores psicológicos é pouco estudada. Objetivo: Estudar a possível associação entre aspectos de autoestima e cárie dentária em adolescentes. Material e método: Estudo transversal envolvendo amostra de 409 adolescentes de 13 municípios do sul do Brasil. A cárie foi avaliada segundo critérios da Organização Mundial da Saúde e a autoestima, pela Escala de Rosenberg. O teste do qui-quadrado foi utilizado para determinar a significância estatística das associações. Para ajustar para variáveis de confusão, foi utilizada a regressão loglinear de Poisson com estimativa robusta. Resultado: Foram observadas associações positivas entre presença de dentes cariados e alguns aspectos da escala de autoestima: "Às vezes, eu acho que não presto para nada" (p <0,001); "Eu gostaria de poder ter mais respeito comigo mesmo" (p=0,016), e "Eu, com certeza, me sinto inútil, às vezes" (p=0,022). Associação negativa foi observada com: "No conjunto, eu estou satisfeito comigo" (p=0,022). Na análise ajustada, os adolescentes com dentes cariados apresentaram maior prevalência de respostas positivas para a questão "Às vezes, eu acho que não presto para nada" [RP= 1,23 (IC 95% 1,05; 1,44)] e maior prevalência de respostas negativas para a questão "No conjunto, eu estou satisfeito comigo" [RP= 1,12 (IC 95% 1,02; 1,24)]. Conclusão: Aspectos da autoestima foram, independente e significativamente, associados com a presença de dentes cariados.Descritores: Cárie dentária; autoestima; adolescentes. AbstractIntroduction: Dental caries in adolescents remains an important public health problem, but its relationship with psychological factors are poorly studied. Objective: To study the possible association between aspects of self-esteem and dental caries in adolescents. Material and method: A cross-sectional study involving a sample of 409 adolescents from 13 Southern Brazilian municipalities was carried out. Dental caries status was assessed through the World Health Organization criteria. For questions related to self-esteem the Rosenberg Self-Esteem Scale was used. The outcomes were each question of the scale. The chi-square test was used to determine statistical significance of associations. To adjust for confounding variables, the Poisson loglinear with robust estimator was used. Result: Positive associations were observed for the presence of decayed teeth and "At times, I think I am no good at all" (p<0.001), "I wish I could have more respect for myself " (p= 0.016), "I certainly feel useless at times" (p= 0.022) and negative association with "On the whole, I am satisfied with myself " (p= 0.022). In the adjusted analysis, adolescents with decayed teeth had a higher prevalence of positive responses to "At times, I think I am no good at all" [(PR= 1.23 (CI 95% 1.05; 1.44)], and negative responses for "On the whole, I am satisfied with myself " [(PR= 1.12 (CI 95% 1.02; 1.24)]. Conclusion: Aspects of self-esteem ...

Objective: To study the impact of dental trauma on the oral health-related quality of life among Brazilian students. Methods: A cross-sectional study involving a representative sample of students of the public schools (n = 435) in a city in southern Brazil was carried out. Data on dental trauma were collected through oral examinations using the O’Brien’s criteria (1993) restricted to fractures and avulsions. The Brazilian version of the Oral Impacts on Daily Performances (OIDP) was used in order to collect data on the impact of oral health-related quality of life. Bivariate and multivariate analysis were performed through Poisson log-linear regression with robust estimator with significance levels set at p <0.05. Prevalence ratios (PR) and confidence intervals (95%) were estimated. Results: The prevalence of dental trauma was 7.2%, and it was associated with the following dimensions: performing daily activities [(PR = 3.52 (95% CI, 1.06-11.75)] (p = 0.040), and speaking [(PR = 3.67 (95% CI, 1.24-10.86)] (p = 0.019) after adjusting for sex, age, dental caries and malocclusion. Conclusion: The prevalence of dental trauma found among this population was low, but significantly associated with oral health-related quality of life.