OBJETIVOS: avaliar o aleitamento materno, ressaltando os fatores que levaram ao desmame precoce conforme as condições socioeconômico-culturais. MÉTODOS: analisou-se uma amostra de 599 crianças e seus responsáveis que procuraram o Pronto Socorro do Instituto da Criança, São Paulo, de agosto a dezembro de 1998. Utilizou-se um questionário incluindo: idade, profissão e escolaridade dos pais, condições de moradia, renda familiar, trabalho materno, duração da amamentação exclusiva, introdução de novos alimentos, causas de desmame e importância do leite materno. RESULTADOS: 86,1% das mães amamentaram e 92% referiram saber a importância do leite materno. A idade média do desmame foi de 3,3 meses, sendo que 75,9% das mães suspenderam a amamentação sem orientação médica. 38,9% referiram que o leite era "fraco", ou "secou" ou que a criança "largou" o peito. Maior escolaridade da mãe e presença de rede de esgoto mostraram relação com maior tempo de aleitamento (p = 0,016 e p = 0,011 respectivamente). Não houve associação entre acompanhamento da criança no posto de saúde e tempo de aleitamento materno. CONCLUSÕES: embora a grande maioria das mães saiba a importância do leite materno e tenha amamentado seu filho, a duração do aleitamento materno exclusivo é menor do que o preconizado pela Organização Mundial da Saúde, sendo a baixa escolaridade um fator para o desmame precoce.

Sex differences in the prevalence of psychiatric disorders are well documented, with exposure to stress during gestation differentially impacting females and males. We explored sex-specific DNA methylation in the cord blood of 39 females and 32 males born at term and with appropriate weight at birth regarding their potential connection to psychiatric outcomes. Mothers were interviewed to gather information about environmental factors (gestational exposure) that could interfere with the methylation profiles in the newborns. Bisulphite converted DNA was hybridized to Illumina HumanMethylation450 BeadChips. Excluding XYS probes, there were 2,332 differentially methylated CpG sites (DMSs) between sexes, which were enriched within brain modules of co-methylated CpGs during brain development and also differentially methylated in the brains of boys and girls. Genes associated with the DMSs were enriched for neurodevelopmental disorders, particularly for CpG sites found differentially methylated in brain tissue between patients with schizophrenia and controls. Moreover, the DMS had an overlap of 890 (38%) CpG sites with a cohort submitted to toxic exposition during gestation. This study supports the evidences that sex differences in DNA methylation of autosomes act as a primary driver of sex differences that are found in psychiatric outcomes.

In adults treated with hemodialysis, poorer dental health was associated with early death, whereas preventive dental health practices were associated with longer survival.

IntroductionAdults with end-stage kidney disease (ESKD) treated with haemodialysis experience mortality of between 15% and 20% each year. Effective interventions that improve health outcomes for long-term dialysis patients remain unproven. Novel and testable determinants of health in dialysis are needed. Nutrition and dietary patterns are potential factors influencing health in other health settings that warrant exploration in multinational studies in men and women treated with dialysis. We report the protocol of the “DIETary intake, death and hospitalisation in adults with end-stage kidney disease treated with HaemoDialysis (DIET-HD) study,” a multinational prospective cohort study. DIET-HD will describe associations of nutrition and dietary patterns with major health outcomes for adults treated with dialysis in several countries.Methods and analysisDIET-HD will recruit approximately 10 000 adults who have ESKD treated by clinics administered by a single dialysis provider in Argentina, France, Germany, Hungary, Italy, Poland, Portugal, Romania, Spain, Sweden and Turkey. Recruitment will take place between March 2014 and June 2015. The study has currently recruited 8000 participants who have completed baseline data. Nutritional intake and dietary patterns will be measured using the Global Allergy and Asthma European Network (GA2LEN) food frequency questionnaire. The primary dietary exposures will be n-3 and n-6 polyunsaturated fatty acid consumption. The primary outcome will be cardiovascular mortality and secondary outcomes will be all-cause mortality, infection-related mortality and hospitalisation.Ethics and disseminationThe study is approved by the relevant Ethics Committees in participating countries. All participants will provide written informed consent and be free to withdraw their data at any time. The findings of the study will be disseminated through peer-reviewed journals, conference presentations and to participants via regular newsletters. We expect that the DIET-HD study will inform large pragmatic trials of nutrition or dietary interventions in the setting of advanced kidney disease.