On the Nuisance Parameter Elimination Principle in Hypothesis Testing.

The Non-Informative Nuisance Parameter Principle concerns the problem of how inferences about a parameter of interest should be made in the presence of nuisance parameters. The principle is examined in the context of the hypothesis testing problem. We prove that the mixed test obeys the principle for discrete sample spaces. We also show how adherence of the mixed test to the principle can make performance of the test much easier. These findings are illustrated with new solutions to well-known problems of testing hypotheses for count data.

Prevalence and Associated Factors of Cryptococcal Antigenemia in HIV-Infected Patients with CD4 < 200 Cells/µL in São Paulo, Brazil: A Bayesian Analysis

Cryptococcosis is a severe life-threatening disease and a major cause of mortality in people with advanced AIDS and CD4 ≤ 100 cells/µL. Considering the knowledge gap regarding the benefits of routine application of antigenemia tests in HIV-infected patients with 100−200 CD4 cells/µL for the prevention of cryptococcal meningitis (CM), we aimed to evaluate the prevalence of positive antigenemia through lateral flow assay (LFA) and associated factors in HIV-infected patients with CD4 < 200 cells/µL. Our findings of 3.49% of positive LFA (LFA+) patients with CD4 < 100 cells/µL and 2.24% with CD4 between 100−200 cells/µL have been included in a Bayesian analysis with 12 other studies containing similar samples worldwide. This analysis showed a proportion of 3.6% LFA+ patients (95% credible interval-Ci [2.5−5.7%]) with CD4 < 100 cells/µL and 1.1% (95%Ci [0.5−4.3%]) with CD4 between 100−200 cells/µL, without statistical difference between these groups. The difference between mortality rates in LFA+ and negative LFA groups was e = 0.05013. Cryptococcoma and CM were observed in the LFA+ group with 100−200 and <100 CD4 cells/µL, respectively. Considering the benefits of antifungal therapy for LFA+ patients, our data reinforced the recommendation to apply LFA as a routine test in patients with 100−200 CD4 cells/µL aiming to expand cost-effectiveness studies in this group.

The positive impact of an intervention for maternal depression on child emotional and behavioral symptoms in a low-resource setting

Objectives: Children of depressed mothers are at risk of developing mental health problems. We sought to determine whether treatment for maternal depression by community-based health workers would decrease behavioral/emotional symptoms in their children. Interventions for maternal depressive symptoms in a low/middle-income country can have a high global impact. Methods: Community-based health workers were trained to deliver a psychosocial intervention for mothers with depression in a primary care setting. A total of 49 mothers and 60 children were assessed pre-intervention, post-intervention, and at 6 months follow-up. Child behavioral/emotional symptoms were evaluated according to type of change in maternal depressive symptoms: response or remission. Results: An overall decrease in maternal depressive symptoms from baseline to post-intervention and 6 months follow-up were found. Response or remission was associated with better outcomes in child behavioral/emotional symptoms at 6 months follow-up (p = 0.0247, Cohen's d: 0.76; p = 0.0224, Cohen's f: 0.44) but not at post-intervention (p = 0.1636, Cohen's d: 0.48; p = 0.0720, Cohen's f: 0.33). Conclusions: Improvement in maternal depression was related to decreased behavioral/emotional symptoms in their children. Our results suggest that providing interventions for maternal depression in primary care is a viable strategy to prevent behavioral/emotional symptoms in the next generation. Clinical Trial registration: Brazilian Clinical Trials, number RBR-5qhmb5.

The positive impact of maternal depression intervention on children's emotional and behavioral symptoms in a low-resource setting.

OBJECTIVE: Children of depressed mothers are at risk of developing mental health problems. We sought to determine whether treatment for maternal depression delivered by community health workers (CHW) would decrease behavioral/emotional symptoms in their child. An intervention treating maternal depressive symptoms in a low-middle-income country can have a high global impact. METHODS: CHW were trained to deliver a psychosocial intervention for mothers with depression in a primary care setting. 49 mothers and 60 children were assessed pre-intervention, post-intervention, and at a 6-months follow-up. Child behavioral/emotional symptoms were evaluated by type of change in maternal depressive symptoms: remission and response. RESULTS: An overall decrease in maternal depressive symptoms from baseline to post-intervention and 6-month follow-up were found. Remission and response of maternal depression was associated with better outcomes related to child´s behavioral/emotional symptoms at the 6-month follow-up (p = 0.0247, Cohen's d: 0.76; p = 0.0224, Cohen's f: 0.44) but not at post-intervention (p = 0.1636, Cohen's d: 0.48; p = 0.0720, Cohen's f: 0.33). CONCLUSION: Maternal depression improvement was related to their child's decreased behavioral/emotional symptoms. Our results suggest that interventions addressing maternal depression in primary care is a viable strategy to prevent behavioral/emotional symptoms in the next generation.

Effect on Antimicrobial Resistance of a Policy Restricting Over-the-Counter Antimicrobial Sales in a Large Metropolitan Area, São Paulo, Brazil.

Although restricting over-the-counter (OTC) antimicrobial drug sales is recommended globally, no data track its effect on antimicrobial resistance (AMR) in bacteria. We evaluated the effect of a national policy restricting OTC antimicrobial sales, put in place in November 2010, on AMR in a metropolitan region of São Paulo, Brazil. We reviewed associations between antimicrobial sales from private pharmacies and AMR in 404,558 Escherichia coli and 5,797 Streptococcus pneumoniae isolates using a dynamic regression model based on a Bayesian approach. After policy implementation, a substantial drop in AMR in both bacterial species followed decreased amoxicillin and trimethoprim/sulfamethoxazole sales. Conversely, increased ciprofloxacin sales were associated with increased ciprofloxacin resistance, and extended spectrum ß-lactamases-positive E. coli isolates and azithromycin sales increases after 2013 were associated with increased erythromycin resistance in S. pneumoniae isolates. These findings suggest that restricting OTC antimicrobial sales may influence patterns of AMR, but multifaceted approaches are needed to avoid unintended consequences.

Adaptive Significance Levels in Tests for Linear Regression Models: The e-Value and P-Value Cases.

The full Bayesian significance test (FBST) for precise hypotheses is a Bayesian alternative to the traditional significance tests based on p-values. The FBST is characterized by the e-value as an evidence index in favor of the null hypothesis (H). An important practical issue for the implementation of the FBST is to establish how small the evidence against H must be in order to decide for its rejection. In this work, we present a method to find a cutoff value for the e-value in the FBST by minimizing the linear combination of the averaged type-I and type-II error probabilities for a given sample size and also for a given dimensionality of the parameter space. Furthermore, we compare our methodology with the results obtained from the test with adaptive significance level, which presents the capital-P P-value as a decision-making evidence measure. For this purpose, the scenario of linear regression models with unknown variance under the Bayesian approach is considered.

A randomized crossover trial to assess therapeutic efficacy and cost reduction of acid ursodeoxycholic manufactured by the university hospital for the treatment of primary biliary cholangitis.

BACKGROUND: Health care costs are growing faster than the rest of the global economy, according to the World Health Organization (WHO). Countries' health expenditures include paying for general medicine, diagnostic procedures, hospitalizations and surgeries, as well as medications and prescribed treatment. Primary biliary cholangitis (PBC) is a rare autoimmune liver disease and the first line available treatment is ursodeoxycholic acid (UDCA), however, direct and indirect treatment costs are expensive. Main aim of this trial was to assess if the therapeutic efficacy of UDCA manufactured by the university hospital is equivalent to that of standard UDCA and treatment cost reduction in patients with PBC. METHODS: It is a prospective, interventional, randomized, and crossover study in patients diagnosed with PBC. UDCA 300 mg tablets and capsules were developed and manufactured by the university hospital. Thirty patients under treatment with standard UDCA, in stable doses were randomized in sequence A and B, 15 patients in each arm. The groups were treated for 12 weeks and after, the UDCA formulation was changed, following for another 12 weeks of continuous therapy (tablets and capsules / capsules and tablets). Laboratory tests were performed at time T0 (beginning of treatment), T1 (at the 12 week-therapy, before the crossing-over) and T2 (end of treatment). The evaluation was done by comparing the hepatic parameters ALP, GGT, ALT, AST and total bilirubin, also considering the adverse events. The comparison of costs was based on price of the manufactured UDCA and standard UDCA price of the hospital. RESULTS: Hospital reduced 66.1% the PBC treatment costs using manufactured UDCA. There were no differences in the biochemical parameters between sequence (A and B) and tablets or capsules of UDCA formulations applied in the treatment of PBC. CONCLUSIONS: The study showed that there was no significant difference between manufactured UDCA (capsule and tablet) and standard UDCA. Hospital reduced the PBC treatment costs using the manufactured UDCA by the university hospital. TRIAL REGISTRATION: ClinicalTrials.gov: NCT03489889 retrospectively registered on January 12th, 2018; Ethics Committee approved the study (ID: 1.790.088) on October 25th, 2016.

Estimating Multivariate Discrete Distributions Using Bernstein Copulas.

Measuring the dependence between random variables is one of the most fundamental problems in statistics, and therefore, determining the joint distribution of the relevant variables is crucial. Copulas have recently become an important tool for properly inferring the joint distribution of the variables of interest. Although many studies have addressed the case of continuous variables, few studies have focused on treating discrete variables. This paper presents a nonparametric approach to the estimation of joint discrete distributions with bounded support using copulas and Bernstein polynomials. We present an application in real obsessive-compulsive disorder data.

Does pediatric post-traumatic stress disorder alter the brain? Systematic review and meta-analysis of structural and functional magnetic resonance imaging studies.

Several studies have recently demonstrated that the volumes of specific brain regions are reduced in children and adolescents with post-traumatic stress disorder (PTSD) compared with those of healthy controls. Our study investigated the potential association between early traumatic experiences and altered brain regions and functions. We conducted a systematic review of the scientific literature regarding functional magnetic resonance imaging and a meta-analysis of structural magnetic resonance imaging studies that investigated cerebral region volumes in pediatric patients with PTSD. We searched for articles from 2000 to 2014 in the PsycINFO, PubMed, Medline, Lilacs, and ISI (Web of Knowledge) databases. All data regarding the amygdala, hippocampus, corpus callosum, brain, and intracranial volumes that fit the inclusion criteria were extracted and combined in a meta-analysis that assessed differences between groups. The meta-analysis found reduced total corpus callosum areas and reduced total cerebral and intracranial volumes in the patients with PTSD. The total hippocampus (left and right hippocampus) and gray matter volumes of the amygdala and frontal lobe were also reduced, but these differences were not significant. The functional studies revealed differences in brain region activation in response to stimuli in the post-traumatic stress symptoms/PTSD group. Our results confirmed that the pediatric patients with PTSD exhibited structural and functional brain abnormalities and that some of the abnormalities occurred in different brain regions than those observed in adults.

Mental health of children who work on the streets in Brazil after enrollment in a psychosocial program.

PURPOSE: To evaluate the mental health status of children working on the streets in Sao Paulo City, Brazil, two years after their participation in a psychosocial program, and to identify factors associated with their mental health status. METHODS: From a total sample of 126 children working on the streets, 107 (85%) were re-evaluated two years after the initiation of a psychosocial program which aimed to cease their work on the streets. The focus was the presence of mental health problems, defined based on a screening instrument (Strengths and Difficulties Questionnaire). Logistic regression models tested factors related to the probability that a child would not present mental health problems at follow-up. RESULTS: The likelihood of a child presenting mental health problems was higher at baseline compared to the two-year follow-up (67.5 and 56.1%, respectively). Absence of mental health problems two years after a psychosocial intervention was significantly correlated with the following baseline factors: lower level of caregiver's psychiatric symptoms as measured by the SRQ (Self-Report Questionnaire) (AOR = 0.84, p = 0.0065), absence of child physical neglect (AOR = 0.38, p = 0.0705) and parental Protestant religion affiliation, compared to other religions (AOR = 4.06; p = 0.0107). CONCLUSIONS: Different factors are related to the absence of mental health problems of children working on the streets after enrollment in a two-year psychosocial program. Our findings suggest that interventions that aim to improve child mental health should consider the detection of psychiatric symptoms in caregivers, provide treatment when it is needed, and also assess other problems such as neglect in the family setting.

Possible solutions to the shortcomings of the Yale-Brown Obsessive-Compulsive Scale / Possíveis soluções para as deficiências da escala de Yale-Brown para avaliação do transtorno obsessivo-compulsivo

OBJECTIVE: The Yale-Brown Obsessive-Compulsive Scale is the most frequently used instrument to measure obsessive-compulsive symptom severity. We describe its shortcomings and propose new methods of evaluating current severity and treatment response. METHOD: The Yale-Brown Obsessive-Compulsive Scale total and subscale scores were pooled from one cross-sectional study database containing information on 1,000 obsessive-compulsive disorder patients from seven specialized mental health care centers. Additional longitudinal data were pooled for 155 patients who participated in a 12-week trial that evaluated the effectiveness of fluoxetine vs. cognitive-behavior therapy as first-line treatment options. All patients were followed by a clinician who provided a clinical opinion of improvement. Neither patients nor clinicians were aware of the classifications proposed in this study. New methods for using the severity scores were compared with the clinical opinion of improvement. RESULTS: In the Yale-Brown Obsessive-compulsive scale, the summing-up of subscale scores to compose a total score does not accurately reflect clinical severity. In addition, the reduction of scores with treatment does not usually reach score zero in either subscale. To overcome such problems, we suggest (a) use of the maximum score of any of the subscales; (b) use of a minimum score of 4 in each subscale or 5 for the maximum in any subscale as the goal after treatment. This method performed better than traditional ones regarding sensitivity and specificity against the gold standard represented by the clinical opinion of improvement. CONCLUSION: The new proposed response criteria are coherent with the clinical opinion of improvement and perform better than the traditional methodology.

RESUMO OBJETIVO: A escala de Yale-Brown para avaliação do transtorno obsessivo-compulsivo é o instrumento mais utilizado para medir a gravidade desse transtorno. Descrevemos as deficiências dessa escala e propomos novos métodos de cálculo dos escores para avaliação de gravidade e resposta ao tratamento. MÉTODO: Os escores totais e subtotais da escala de Yale-Brown foram recuperados de um banco de dados de um estudo transversal com informações sobre 1.000 pacientes com transtorno obsessivo-compulsivos atendidos em sete centros especializados em saúde mental. Foram acrescentados os dados longitudinais de 155 pacientes participantes de um ensaio clínico de 12 semanas que avaliou a eficácia da fluoxetina ou da terapia cognitivo-comportamental como opções de tratamento de primeira linha. Todos os pacientes foram acompanhados por um médico que forneceu um parecer clínico de melhora. Nem os pacientes nem os médicos estavam conscientes das classificações propostas neste estudo. Novos métodos para avaliar os escores de gravidade foram comparados com o parecer clínico de melhora. RESULTADOS: Na escala obsessivo-compulsiva Yale-Brown, a soma de sub-escalas para compor a pontuação total não reflete com precisão a gravidade clínica. Além disso, a redução da pontuação com o tratamento, normalmente, não atinge o valor zero em qualquer das sub-escalas. Para superar esses problemas, sugerimos (a) o uso da pontuação máxima de qualquer das sub-escalas antes do tratamento; (b) o uso de um score mínimo de 4 em cada sub-escala ou um escore mínimo de 5 como o máximo de qualquer das sub-escalas como a meta para o pós-tratamento. Os novos métodos propostos tiveram melhor desempenho do que os tradicionais quanto a sensibilidade e especificidade contra o padrão ouro representado pelo parecer clínico de melhora. CONCLUSÃO: Os novos critérios propostos são coerentes com o parecer clínico de melhora e desempenham melhor do que a metodologia tradicional.

Quality of life of mothers whose children work on the streets of São Paulo, Brazil.

The present study evaluated the perceived quality of life of the mothers of street children and investigated the association with their history of childhood violence, the occurrence of current domestic violence, their current mental states and that of their children, and family functioning. The applied instruments were as follows: Strengths and Difficulties Questionnaire, WorldSAFECore Questionnaire, Instrument for the Assessment of Quality of Life of the WHO, Global Assessment of Relational Functioning Scale, Childhood Trauma Questionnaire and a socio-demographic questionnaire. The sample of convenience consisted of 79 low-income mothers who raised their children alone, and most of whom had a positive screening for mental illness. The multiple regression analysis showed that the perception of quality of life of these women was associated with the presence of psychopathology either in themselves or their children and family dysfunction. Thus any program aimed at improving the quality of life of such mothers should consider addressing their mental problems as well as those of their children, besides offering educational and psychotherapeutic approaches to these families to improve the social environment.

Quality of life of mothers whose children work on the streets of São Paulo, Brazil / Qualidade de vida de mães de crianças trabalhadoras de rua da cidade de São Paulo, Brasil / La calidad de vida de las madres de niños trabajadores en las calles de São Paulo, Brasil

The present study evaluated the perceived quality of life of the mothers of street children and investigated the association with their history of childhood violence, the occurrence of current domestic violence, their current mental states and that of their children, and family functioning. The applied instruments were as follows: Strengths and Difficulties Questionnaire, WorldSAFECore Questionnaire, Instrument for the Assessment of Quality of Life of the WHO, Global Assessment of Relational Functioning Scale, Childhood Trauma Questionnaire and a socio-demographic questionnaire. The sample of convenience consisted of 79 low-income mothers who raised their children alone, and most of whom had a positive screening for mental illness. The multiple regression analysis showed that the perception of quality of life of these women was associated with the presence of psychopathology either in themselves or their children and family dysfunction. Thus any program aimed at improving the quality of life of such mothers should consider addressing their mental problems as well as those of their children, besides offering educational and psychotherapeutic approaches to these families to improve the social environment.

Avaliamos a percepção da qualidade de vida de mães de crianças em situação de rua e investigamos a sua possível associação com os antecedentes maternos de abuso e violência na infância e vitimização atual, sintomas emocionais delas e de seus filhos e com o funcionamento familiar. Foram aplicados os seguintes instrumentos: Instrumento para a Avaliação da Qualidade de Vida da OMS - versão abreviada, Questionário de Capacidades e Dificuldades, WorldSAFECore Questionnaire, Escala de Avaliação Global de Funcionamento nas Relações Familiares, Childhood Trauma Questionnaire e um questionário sociodemográfico. Nossa amostra de conveniência foi constituída por 79 mães, a maioria delas com rastreamento positivo para doença mental. Aplicamos um modelo de regressão múltipla que encontrou associação entre a percepção de pior qualidade de vida com a presença de psicopatologia nelas e em seus filhos e com pior funcionamento familiar. Dessa forma, qualquer programa voltado para a melhora da qualidade de vida de mães nessa condição deve considerar a abordagem de problemas mentais nelas e em seus filhos, além de oferecer recursos educacionais e psicoterapêuticos para as famílias, visando à melhora das condições socioambientais.

Se presenta aquí una evaluación de la calidad de vida percibida por madres de niños en las calles, y se investigó la posible asociación con antecedentes maternos de abuso y violencia en la infancia y victimización actual, los síntomas emocionales de ellos y de sus hijos y el funcionamiento familiar. Se aplicaron los Instrumentos para la Evaluación de la Calidad de Vida de la OMS - versión abreviada, Cuestionario de Capacidades y Dificultades, WorldSAFECore Questionnaire, Escala de Evaluación Global de Funcionamiento en las Relaciones Familiares, Childhood Trauma Questionnaire y un cuestionario sociodemográfico. La muestra incluyó a 79 madres, la mayoría de ellas con una detección positiva para la enfermedad mental. La percepción de calidad de vida se asoció con la presencia de psicopatología en ellos y sus hijos y el funcionamiento familiar. Por lo tanto, cualquier programa destinado a mejorar la calidad de vida de las madres en esta condición debe considerar el enfoque de los problemas mentales en ellos y sus hijos y ofrecer trabajo educativo y terapéutico a esas familias.

Factors related to the cortisol awakening response of children working on the streets and siblings, before and after 2 years of a psychosocial intervention.

The study objective was to observe the cortisol awakening response (CAR) pattern before and after a psychosocial intervention with children from dysfunctional families who had at least one child working on the streets, and to verify factors related to it. Two hundred and eleven children between 7 and 14 years old were selected and 191 were included, 178 were re-evaluated 2 years after, of whom 113 had cortisol measures completed. Besides cortisol, they were evaluated at baseline and at end point regarding: abuse/neglect, mental health symptoms, exposure to urban violence and family environment. There was no significant difference between the CAR area under the curve (AUC) before and after the intervention. Two regression analysis models were built to evaluate factors related to the CAR before and after intervention. Before the intervention, working on the streets (vs. not) was related to a greater cortisol increase after awakening, at follow-up, having suffered physical punishment (vs. not) was related to a flattened cortisol response. The intervention was not associated with changes in the magnitude of the CAR AUC, though the CAR was associated with psychosocial stressors pre- and post-intervention. Effective interventions for children at risk that might shape a physiological cortisol response are still needed.

Lack of association between the 5-HTTLPR and positive screening for mental disorders among children exposed to urban violence and maltreatment.

OBJECTIVE: To ascertain whether genetic variations in the serotonin transporter gene (5-HTTLPR 44-bp insertion/deletion polymorphism) influence an increase in depressive and anxiety symptoms in children and adolescents exposed to high levels of violence. METHODS: Saliva samples were collected from a group of children who were working on the streets and from their siblings who did not work on the streets. DNA was extracted from the saliva samples and analyzed for 5-HTTLPR polymorphism genotypes. RESULTS: One hundred and seventy-seven children between the ages of 7 and 14 years were analyzed (114 child workers and 63 siblings). Data on socioeconomic conditions, mental symptoms, and presence and severity of maltreatment and urban violence were collected using a sociodemographic inventory and clinical instruments. There was no positive correlation between the 5-HTTLPR polymorphism and presence of mental symptoms in our sample, although the children were exposed to high levels of abuse, neglect, and urban violence. CONCLUSIONS: Despite previous studies that associated adult psychiatric disorders with the 5-HTTLPR polymorphism and a history of childhood maltreatment, no such association was found in this sample of children at risk.

Lack of association between the 5-HTTLPR and positive screening for mental disorders among children exposed to urban violence and maltreatment

Objective: To ascertain whether genetic variations in the serotonin transporter gene (5-HTTLPR 44-bp insertion/deletion polymorphism) influence an increase in depressive and anxiety symptoms in children and adolescents exposed to high levels of violence. Methods: Saliva samples were collected from a group of children who were working on the streets and from their siblings who did not work on the streets. DNA was extracted from the saliva samples and analyzed for 5-HTTLPR polymorphism genotypes. Results: One hundred and seventy-seven children between the ages of 7 and 14 years were analyzed (114 child workers and 63 siblings). Data on socioeconomic conditions, mental symptoms, and presence and severity of maltreatment and urban violence were collected using a sociodemographic inventory and clinical instruments. There was no positive correlation between the 5-HTTLPR polymorphism and presence of mental symptoms in our sample, although the children were exposed to high levels of abuse, neglect, and urban violence. Conclusions: Despite previous studies that associated adult psychiatric disorders with the 5-HTTLPR polymorphism and a history of childhood maltreatment, no such association was found in this sample of children at risk. .

Exposure to maltreatment and urban violence in children working on the streets in São Paulo, Brazil: factors associated with street work

Objective: To quantitatively study the exposure to childhood maltreatment and urban violence in children from families with at least one child working on the streets and to investigate the relationship between these factors and street work. Methods: Families who participated in a nongovernmental organization (NGO) program to eliminate child labor were included. Data concerning sociodemographic characteristics, punishment methods used in the family environment against the children, five types of abuse and neglect perpetrated by the caregivers, urban violence exposure and family functioning were collected. Results: The sample included 126 children who were working on the streets and 65 siblings who were not working on the streets. Caregivers reported high levels of severe physical punishment. The children reported high levels of abuse and neglect, and high levels of urban violence exposure. The families showed a predominance of dysfunctional and unsatisfactory relationships. A multiple logistic regression model showed that age older than 12 years and severe physical punishment at home were associated with street work. Conclusion: Interventions to decrease the risk of child street work should be family-focused and should aim to reduce violence in the family environment. .

Exposure to maltreatment and urban violence in children working on the streets in São Paulo, Brazil: factors associated with street work.

OBJECTIVE: To quantitatively study the exposure to childhood maltreatment and urban violence in children from families with at least one child working on the streets and to investigate the relationship between these factors and street work. METHODS: Families who participated in a nongovernmental organization (NGO) program to eliminate child labor were included. Data concerning sociodemographic characteristics, punishment methods used in the family environment against the children, five types of abuse and neglect perpetrated by the caregivers, urban violence exposure and family functioning were collected. RESULTS: The sample included 126 children who were working on the streets and 65 siblings who were not working on the streets. Caregivers reported high levels of severe physical punishment. The children reported high levels of abuse and neglect, and high levels of urban violence exposure. The families showed a predominance of dysfunctional and unsatisfactory relationships. A multiple logistic regression model showed that age older than 12 years and severe physical punishment at home were associated with street work. CONCLUSION: Interventions to decrease the risk of child street work should be family-focused and should aim to reduce violence in the family environment.

The impact of healthy parenting as a protective factor for posttraumatic stress disorder in adulthood: a case-control study.

BACKGROUND: Early life social adversity can influence stress response mechanisms and is associated with anxious behaviour and reductions in callosal area later in life. OBJECTIVE: To evaluate the association between perceptions of parental bonding in childhood/adolescence, hypothalamic-pituitary-adrenal (HPA) axis response, and callosal structural integrity in adult victims of severe urban violence with and without PTSD. METHODS: Seventy-one individuals with PTSD and 62 without the disorder were assessed with the Parental Bonding Instrument (PBI). The prednisolone suppression test was administered to assess cortisol levels, and magnetic resonance imaging was used to assess the total area of the corpus callosum (CC), as well as the areas of callosal subregions. RESULTS: The PBI items related to the perception of 'not having a controlling mother' (OR 4.84; 95%CI [2.26-10.3]; p=0.01), 'having a caring father' (OR 2.46; 95'%CI [1.18-5.12]; p=0.02), and 'not having controlling parents' (OR 2.70; 95%CI [1.10-6.63]; p=0.04) were associated with a lower risk of PTSD. The PTSD group showed a blunted response to the prednisolone suppression test, with lower salivary cortisol levels upon waking up (p=0.03). Individuals with PTSD had smaller total CC area than those without the disorder, but these differences were not statistically significant (e-value =0.34). CONCLUSIONS: Healthy parental bonding, characterized by the perception of low parental control and high affection, were associated with a lower risk of PTSD in adulthood, suggesting that emotional enrichment and the encouragement of autonomy are protective against PTSD in adulthood.

Specific traumatic events during childhood as risk factors for posttraumatic stress disorder development in adults.

To evaluate differences in early life events (ELE) on adult victims of severe interpersonal violence among patients who developed posttraumatic stress disorder (PTSD) and control group. Adult victims of interpersonal violence were evaluated to diagnose the presence of PTSD and ELE. 308 subjects were included, 141 in patient's group (PTSD+) and 167 in control group (PSTD-). PTSD+ group had more severe PTSD, depressive symptoms and higher ETI scores than PTSD- group. Patients in PTSD+ group had a more frequent history of ELE. Some ELE were more significant for the development of this predisposition.