Introduction: Lithium can be found naturally in drinking water. There is some evidence that natural levels of lithium in drinking water may have a protective effect on suicide mortality. The aim of this study is to evaluate if higher natural concentrations of lithium in public drinking water are associated with lower local rates of suicide in Portugal.Material and Methods: Suicide standardized mortality ratios at 54 Portuguese municipalities within the 6-year period from 2011 to 2016 was correlated with lithium concentrations in public drinking water and socioeconomic factors using Pearson’s correlation coefficients (r) with one-tailed tests. Multivariate regression models were adjusted for well-known socioeconomic factors known to influence suicide mortality in Portugal (population density, average income per capita, unemployment rates and proportion of Roman Catholics).Results: The average lithium level, as evidenced by raw values for 54 municipalities, was 10.88 μg/L (standard deviation = 27.18). There was no statistically significant correlation between lithium levels and suicide standardized mortality ratio (r = 0.001, p-value = 0.996). There was a statistically significant higher suicide standardized mortality ratio for males (p-value = 0.000). When analyzed separately for both sexes, no statistically significant correlation between suicide standardized mortality ratio and lithium levels was found (male r = 0.024, p-value = 0.862; female r = 0.000, p-value = 0.999). No association between suicide standardized mortality ratio and socioeconomic factors was found: population density (r = -0.144, p-value = 0.300), average income per capita (r = -0.112, p-value = 0.418), unemployment rates (r = -0.001, p-value = 0.994), and proportion of Roman Catholics (r =- 0.150, p-value = 0.278).Discussion: Unlike most international studies regarding natural lithium levels and suicide risk, no inverse relation was found in Portugal. Factors such as the country’s low suicide rate, confunding suicide risk variables, and unaccounted lithium intake might have influenced these findings.Conclusions: No association between lithium in public drinking water and suicide rates was found in Portugal.
A epifisiólise femoral superior é uma patologia importante da anca, já que afeta indivíduos em fase de desenvolvimento, maioritariamente dos 11 aos 15 anos. A sua etiologia não é, ainda, totalmente conhecida, sendo que vários fatores têm vindo a ser apontados como potenciais pontos de partida para o seu desenvolvimento. O doente típico é um jovem rapaz, com obesidade, claudicação, dor na região inguinal, na anca ou referida ao joelho, marcha em rotação externa e incapacidade de rotação interna e abdução da anca afetada. A radiografia tem-se demonstrado como o melhor método complementar de diagnóstico, muito útil na deteção da doença e na programação da terapêutica. O tratamento é variável consoante se trate de um caso agudo ou crónico, no entanto a cirurgia de fixação com recurso a um único parafuso ocupa posição de destaque em ambas as situações. Este trabalho visa fazer uma revisão bibliográfica do tema em questão recorrendo à bibliografia existente principalmente na Pubmed, focando-se em aspetos como a etiologia, epidemiologia, clínica, diagnóstico, tratamento e complicações. Pretende, ainda, realçar a importância de um tratamento precoce como a chave da prevenção do desenvolvimento de osteoartrose nestes doentes.
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