Airborne manganese exposure and neurobehavior in school-aged children living near a ferro-manganese alloy plant.

Excessive exposure to Mn can lead to its accumulation in the brain with neurotoxic consequences. In children, elevated Mn has been associated with deficits in certain neuropsychological domains such as cognition, motor function, memory and attention, and in some instances, hyperactivity and behavioral problems. The aim of this study was to evaluate behavioral effects in school-aged children living near a ferro-manganese alloy plant and examine their association with Mn exposure. Occipital hair, toenails and blood samples were collected from 225 children (7-12 years old) enrolled in four elementary schools with different levels of exposure to Mn, based on dust Mn deposition rates. Full data set collection was completed and run from 165 children. Mn in hair (MnH), toenails (MnTn), blood (MnB) and blood lead levels (PbB) were determined by graphite furnace atomic absorption spectrometry. Children's behavior was assessed with the Child Behavior Check List (CBCL) reported by parents. Median levels and range of MnH, MnT and MnB were, respectively, 0.73 µg/g (0.16-8.79), 0.84 µg/g (0.15-9.29) and 8.98 µg/L (1.51-40.43). Median and range of PbB were 1.2 µg/dL (0.2-15.6). MnH and MnB were not associated with any scale of the CBCL behavior scores. We found a positive association between logMnTn and raw total CBCL score (ß = 10.17, p = 0.034), adjusting for sex, age, maternal IQ and logPbB. Analyses using Generalized Additive Model showed non-linear associations between MnTn and externalizing behavior (p = 0.035), as well as with the related subscales: aggressive behavior (p = 0.045) and rule-breaking behavior (p = 0.024). Further positive associations were observed between MnTn and thought problems (p = 0.031) and social problems (p = 0.027). These findings corroborate previous studies showing an association between Mn exposures and externalizing behavior. Our results suggest that toenail Mn, as a biomarker of environmental exposure, is associated with disruptive behavior in children living near a ferro-manganese alloy plant.

Parents' mental health and children's emotional regulation during the COVID-19 pandemic / Saúde mental parental e regulação emocional infantil durante a pandemia de COVID-19 / Salud mental parental y regulación emocional infantil durante la pandemia de COVID-19

ABSTRACT The objectives of the study were to investigate parents' mental health before and during the COVID-19 pandemic; to find correlations between parents' mental health and their perceptions of risk, virus exposure, use of preventive measures, COVID-19 knowledge, and social distancing practices; and to analyze correlations between parents' mental health and their perception about children's emotional regulation (ER). Participants were 69 parents of children aged between 5 and 12. The instruments used were ERC, HADS, ABEP, and a questionnaire about COVID-19. Descriptive analyses, the Wilcoxon test, and Spearman's correlation were conducted. The results indicated increased parental anxiety and depression during the pandemic, and a weak negative correlation between parental anxiety and their children's ER. The pandemic acts as a stressor, which impacts the mental health of both parents and children.

RESUMO Os objetivos do estudo foram investigar a saúde mental parental antes e durante a pandemia da COVID-19; verificar as associações entre saúde mental parental e suas percepções de risco, exposição ao vírus, uso de medidas preventivas, conhecimento sobre a COVID-19 e práticas de distanciamento social; e analisar as relações entre saúde mental parental e suas percepções sobre a Regulação Emocional (RE) infantil. Os participantes desta pesquisa foram 69 pais de crianças entre 5 e 12 anos. Os instrumentos utilizados foram: ERC, HADS, ABEP e questionário sobre a COVID-19. Foram realizadas análises descritivas, Teste de Wilcoxon e correlação de Spearman. Foram encontrados aumento dos níveis de ansiedade e depressão parental durante a pandemia, bem como uma correlação negativa fraca entre ansiedade parental e RE infantil. A pandemia, enquanto agente estressor, tende a impactar a saúde mental de pais e crianças.

RESUMEN Los objetivos del estudio fueron investigar la salud mental de los padres antes y durante la COVID-19; comprobar relaciones entre la salud mental de los padres y sus percepciones de riesgo, exposición a virus, uso de medidas preventivas, conocimiento de COVID-19 y prácticas de distanciamiento social y analizar las correlaciones entre la salud mental de los padres y su percepción sobre la Regulación Emocional (RE) de los niños. Los participantes fueron 69 padres de niños de entre 5 y 12 años. Los instrumentos utilizados fueron ERC, HADS, ABEP y un cuestionario sobre COVID-19. Se realizaron análisis descriptivos, la prueba de Wilcoxon y la correlación de Spearman. Los resultados indicaron aumento en la ansiedad y depresión de los padres; correlación negativa débil entre la ansiedad de los padres y la ER de sus hijos. La pandemia actúa como un factor de estrés, que tiene un impacto en la salud mental de padres e hijos.