We provide a systematic review of epidemiological surveys of autistic disorder and pervasive developmental disorders (PDDs) worldwide. A secondary aim was to consider the possible impact of geographic, cultural/ethnic, and socioeconomic factors on prevalence estimates and on clinical presentation of PDD. Based on the evidence reviewed, the median of prevalence estimates of autism spectrum disorders was 62/10 000. While existing estimates are variable, the evidence reviewed does not support differences in PDD prevalence by geographic region nor of a strong impact of ethnic/cultural or socioeconomic factors. However, power to detect such effects is seriously limited in existing data sets, particularly in low‐income countries. While it is clear that prevalence estimates have increased over time and these vary in different neighboring and distant regions, these findings most likely represent broadening of the diagnostic concets, diagnostic switching from other developmental disabilities to PDD, service availability, and awareness of autistic spectrum disorders in both the lay and professional public. The lack of evidence from the majority of the world's population suggests a critical need for further research and capacity building in low‐ and middle‐income countries. Autism Res 2012, 5: 160–179. © 2012 International Society for Autism Research, Wiley Periodicals, Inc.

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Physical and verbal punishments of children are common in high-, middle-, and low-income communities around the world. The forms and rates of punishment vary among countries and among communities within countries. A median of 16% of children experienced harsh or potentially abusive physical discipline in the previous year.

Pervasive developmental disorders are now commonly referred to as autism spectrum disorders (ASDs). ASDs present with a range of severity and impairments, and often are a cause of severe disability, representing a major public health concern. The diagnostic criteria require delays or abnormal functioning in social interaction, language, and/or imaginative play within the first 3 years of life, resulting in a deviation from the developmental pattern expected for the age. Because establishing a diagnosis of ASD is possible as early as 18-24 months of age, clinicians should strive to identify and begin intervention in children with ASD as soon as signs are manifest. Increasing efforts are underway to make ASD screening universal in pediatric healthcare. Given the crucial importance of early identification and multiple modalities of treatment for ASD, this review will summarize the diagnostic criteria, key areas for assessment by clinicians, specific scales and instruments for assessment, and discussion of evidence-based treatment programs and the role of specific drug therapies for symptom management.

This pilot study presents preliminary results concerning the prevalence of Pervasive Developmental Disorder (PDD) in South America. It was a three-phase study conducted in a typical town in Southeast Brazil. Case definition was based in a combination of standardized instruments and clinical evaluations by experts. The prevalence of PDD was 27.2/10,000 (95% CI: 17.6-36.8) and some hypotheses were raised to explain this low frequency. Clinical findings of PDD cases were consistent with previous data, such as, male preponderance, more children diagnosed with PDD-NOS than with autistic disorder, and half of them born from older mothers. Moreover, the study raised concerns about treatment of cases, because identification of PDD had been late and access to services has been very limited.

Scales with evidence of validity and reliability are important to evaluate child development. In Brazil, there is a lack of standardized instruments to evaluate young children. This study investigated the psychometric properties of the Bayley Scales of Infant Development, Third Edition (Bayley-III). It was translated into Brazilian Portuguese, culturally adapted and tested on 207 children (12-42 months of age). Evidence of convergent validity was obtained from correlations of the Bayley-III with the: Peabody Developmental Motor Scale 2, Leiter International Performance Scale-R, Expressive Vocabulary Assessment List and Peabody Picture Vocabulary Test. Exploratory factor analyses showed a single component explaining 86% of the variance, supported by goodness-of-fit indexes in confirmatory factor analysis. The Bailey-III demonstrated good internal consistency with alpha coefficients greater than or equal to .90 and stability for fine motor scale only. These robust psychometric properties support the use of this tool in future national studies on child development.

The frequency of DVAW is high in the studied community and produces immediate impacts on the victim's health, work, and family life. These impacts decrease the victim's ability to look for help and hinder the breaking of the cycle of violence.

objetivo de identificar fatores associados a problemas de saúde mental em crianças/adolescentes (PSMCA) em amostra probabilística (N=67, faixa etária 4-17 anos). Foram aplicados instrumentos estruturados às mães: Child Behavior Checklist (PSMCA); WorldSAFE Core Questionnaire (dados sociodemográficos; violência doméstica; embriaguez do pai/padrasto); Self-Report Questionnaire (problemas de saúde mental maternos, ideação suicida materna). Os resultados do estudo apontaram fatores estatisticamente associados aos PSMCA: criança/adolescente ser do sexo masculino e sofrer punição física grave; ideação suicida da mãe e violência conjugal física grave contra a mãe; embriaguez do pai/padrasto. Concluindo, grupos vulneráveis com características individuais/familiares identificadas neste estudo devem ser considerados prioritários em propostas de prevenção/tratamento. Palavras-chave: saúde mental; fatores de risco; criança; adolescente; estudos transversais. Risk Factors for Mental Health Problems in Childhood/Adolescence.ABSTRACT -A cross-sectional study was conducted in an urban low-income community in the municipality of Embu-SP with the objective of identifying factors associated with mental health problems of children and adolescents (MHPCA) in a probabilistic sample (N=67, aged 4-17 years). Standardized instruments were applied to mothers: Child Behavior Checklist; WorldSAFE Core Questionnaire (demographics, domestic violence, father/stepfather drunkenness); Self-Report Questionnaire (maternal mental health problems and suicide ideation). The results of this study identified factors statistically related to MPHCA: child/adolescent of male gender and severe physical punishment; maternal suicide ideation and severe physical marital violence; father/stepfather drunkenness. As a result, vulnerable groups with individual/family characteristics identified in this study should have priority in prevention/treatment programs.