Ill-defined causes of death in Brazil: a redistribution method based on the investigation of such causes

OBJETIVO: Propor método de redistribuição de causas mal definidas de óbito baseado na investigação dessas causas. MÉTODOS: Foram analisados os resultados das investigações dos óbitos notificados como causas mal definidas (CMD) do capítulo XVIII da Classificação Estatística Internacional de Doenças (CID-10), no Sistema de Informações de Mortalidade em 2010. Os coeficientes de redistribuição foram calculados segundo a distribuição proporcional das causas mal definidas reclassificadas após investigação em qualquer capítulo da CID-10, exceto o capítulo XVIII, e utilizados para redistribuir as causas mal definidas não investigadas e remanescentes, segundo sexo e idade. O coeficiente de redistribuição-CMD foi comparado com dois métodos usuais de redistribuição: a) coeficiente de redistribuição-Total, baseado na distribuição proporcional de todas as causas definidas notificadas; b) coeficiente de redistribuição-Não externas, similar ao anterior, com exclusão das causas externas. RESULTADOS: Dos 97.314 óbitos por causas mal definidas notificados em 2010, 30,3% foram investigados. Desses, 65,5% foram reclassificados em causas definidas após investigação. As doenças endócrinas, transtornos mentais e causas maternas tiveram representação maior entre as causas mal definidas reclassificadas, ao contrário das doenças infecciosas, neoplasias e doenças do aparelho geniturinário, com proporções maiores entre causas definidas notificadas. As causas externas representaram 9,3% das causas mal definidas reclassificadas. A correção das taxas de mortalidade pelos critérios coeficiente de redistribuição-Total e coeficiente de redistribuição-Não externas aumentou a magnitude das taxas por fator relativamente semelhante para a maioria das causas, ao contrário do coeficiente de redistribuição-CMD, que corrigiu as diferentes causas de óbito com pesos diferenciados. CONCLUSÕES: A distribuição proporcional de causas entre as causas mal definidas reclassificadas após investigação não foi semelhante à distribuição original de causas definidas. Portanto, a redistribuição das causas mal definidas remanescentes com base nas investigações permite estimativas mais adequadas do risco de mortalidade por causas específicas.OBJECTIVE: To propose a method of redistributing ill-defined causes of death (IDCD) based on the investigation of such causes. METHODS: In 2010, an evaluation of the results of investigating the causes of death classified as IDCD in accordance with chapter 18 of the International Classification of Diseases (ICD-10) by the Mortality Information System was performed. The redistribution coefficients were calculated according to the proportional distribution of ill-defined causes reclassified after investigation in any chapter of the ICD-10, except for chapter 18, and used to redistribute the ill-defined causes not investigated and remaining by sex and age. The IDCD redistribution coefficient was compared with two usual methods of redistribution: a) Total redistribution coefficient, based on the proportional distribution of all the defined causes originally notified and b) Non-external redistribution coefficient, similar to the previous, but excluding external causes. RESULTS: Of the 97,314 deaths by ill-defined causes reported in 2010, 30.3% were investigated, and 65.5% of those were reclassified as defined causes after the investigation. Endocrine diseases, mental disorders, and maternal causes had a higher representation among the reclassified ill-defined causes, contrary to infectious diseases, neoplasms, and genitourinary diseases, with higher proportions among the defined causes reported. External causes represented 9.3% of the ill-defined causes reclassified. The correction of mortality rates by the total redistribution coefficient and non-external redistribution coefficient increased the magnitude of the rates by a relatively similar factor for most causes, contrary to the IDCD redistribution coefficient that corrected the different causes of death with differentiated weights. CONCLUSIONS: The proportional distribution of causes among the ill-defined causes reclassified after investigation was not similar to the original distribution of defined causes. Therefore, the redistribution of the remaining ill-defined causes based on the investigation allows for more appropriate estimates of the mortality risk due to specific causes

Development of Loxosceles intermedia Mello-Leit\ue3o (1934) (Araneae, Sicariidae) genital tract

We examined the post-embryonic development of the male and female genital apparatus of the brown spider, Loxosceles intermedia. The development of the genital apparatus for both sexes begins with the appearance of inner structures. In the male genital apparatus, formation of the testes occurs first, followed by differentiation of the duct, ampulla and vas deferens, and finally the formation of the genital opening and differentiation of the copulatory organ (secondary sexual characteristic). Similarly, the development of the female genital apparatus begins with the formation of the ovaries, followed by the appearance of oocytes in vitellogenesis, then the development of oviducts and uterus internus and, finally, the spermatheca. These data may be very important in further comparative studies on the development of the reproductive system of spiders