RESUMO Objetivo: Analisar a sobrevida específica em cinco anos do câncer colorretal diagnosticado entre 2008 e 2013, segundo sexo e faixa etária, de residentes na Grande Cuiabá, Mato Grosso. Métodos: Estudo de coorte retrospectiva. A sobrevida específica pelo câncer colorretal foi considerada como o tempo entre o diagnóstico da doença até o óbito por câncer colorretal, em meses. Utilizaram-se dados do Registro de Câncer de Base Populacional e do Sistema de Informações sobre Mortalidade. Para estimar a probabilidade de sobrevida por sexo e faixa etária, utilizou-se o estimador de Kaplan-Meier, e, para estimar o efeito da faixa etária na sobrevida dos participantes, foi ajustado modelo de Cox estratificado por sexo. Resultados: De 2008 a 2013, registraram-se 683 casos novos e 193 óbitos por câncer colorretal. O tempo mediano entre o diagnóstico e a morte por câncer colorretal foi de 44,8 meses (IC95% 42,4–47,3) para as mulheres e 46,1 meses (IC95% 43,4–48,6) para os homens e a probabilidade de sobrevida em cinco anos de 83,5% (IC95% 79,9–87,2%) e 89,6% (IC95% 86,4–93,0%), respectivamente. Os homens com 70-79 anos (HR=2,97; IC95% 1,11–3,87) e com 80 anos ou mais (HR=3,09; IC95% 1,31–7,27) apresentaram maior risco de mortalidade e sem diferença para as mulheres. Conclusão: O sexo feminino apresentou menor tempo entre o diagnóstico e o óbito pela doença, assim como menor probabilidade de sobrevida. Em contrapartida, foram os homens que apresentaram maior risco de mortalidade a partir dos 70 anos.

ABSTRACT Objective: To analyze the specific five-year survival of colorectal cancer (CRC) diagnosed between 2008 and 2013, according to sex and age group, of residents in Greater Cuiabá, state of Mato Grosso, Brazil. Methods: This is a retrospective cohort study. Specific survival of CRC was considered as the time between disease diagnosis and death from CRC, in months. Data from the Population-Based Cancer Registry and the Brazilian Mortality Information System were used. To estimate the probability of survival by sex and age group, the Kaplan-Meier estimator was used, and to estimate the effect of age group on the survival of participants, the Cox model stratified by sex was adjusted. Results: From 2008 to 2013, 683 new cases and 193 deaths from CRC were registered. The median time between diagnosis and death from CRC was 44.8 months (95%CI 42.4– 47.3) for women and 46.1 months (95%CI 43.4–48.6) for men, and the five-year survival probabilities of 83.5% (95%CI 79.9–87.2%) and 89.6% (95%CI 86.4–93.0%), respectively. Men aged 70–79 years (HR=2.97; 95%CI 1.11–3.87) and 80 years or older (HR=3.09; 95%CI 1.31–7.27) were at higher risk of mortality, and we verified no difference for women. Conclusion: Women had a shorter time between the diagnosis of CRC and death from the disease as well as a lower probability of survival. Conversely, men were at higher risk of mortality after 70 years of age.

ABSTRACT Objective: To analyze the specific five-year survival of colorectal cancer (CRC) diagnosed between 2008 and 2013, according to sex and age group, of residents in Greater Cuiabá, state of Mato Grosso, Brazil. Methods: This is a retrospective cohort study. Specific survival of CRC was considered as the time between disease diagnosis and death from CRC, in months. Data from the Population-Based Cancer Registry and the Brazilian Mortality Information System were used. To estimate the probability of survival by sex and age group, the Kaplan-Meier estimator was used, and to estimate the effect of age group on the survival of participants, the Cox model stratified by sex was adjusted. Results: From 2008 to 2013, 683 new cases and 193 deaths from CRC were registered. The median time between diagnosis and death from CRC was 44.8 months (95%CI 42.4– 47.3) for women and 46.1 months (95%CI 43.4–48.6) for men, and the five-year survival probabilities of 83.5% (95%CI 79.9–87.2%) and 89.6% (95%CI 86.4–93.0%), respectively. Men aged 70–79 years (HR=2.97; 95%CI 1.11–3.87) and 80 years or older (HR=3.09; 95%CI 1.31–7.27) were at higher risk of mortality, and we verified no difference for women. Conclusion: Women had a shorter time between the diagnosis of CRC and death from the disease as well as a lower probability of survival. Conversely, men were at higher risk of mortality after 70 years of age.

RESUMO Objetivo: Analisar a sobrevida específica em cinco anos do câncer colorretal diagnosticado entre 2008 e 2013, segundo sexo e faixa etária, de residentes na Grande Cuiabá, Mato Grosso. Métodos: Estudo de coorte retrospectiva. A sobrevida específica pelo câncer colorretal foi considerada como o tempo entre o diagnóstico da doença até o óbito por câncer colorretal, em meses. Utilizaram-se dados do Registro de Câncer de Base Populacional e do Sistema de Informações sobre Mortalidade. Para estimar a probabilidade de sobrevida por sexo e faixa etária, utilizou-se o estimador de Kaplan-Meier, e, para estimar o efeito da faixa etária na sobrevida dos participantes, foi ajustado modelo de Cox estratificado por sexo. Resultados: De 2008 a 2013, registraram-se 683 casos novos e 193 óbitos por câncer colorretal. O tempo mediano entre o diagnóstico e a morte por câncer colorretal foi de 44,8 meses (IC95% 42,4–47,3) para as mulheres e 46,1 meses (IC95% 43,4–48,6) para os homens e a probabilidade de sobrevida em cinco anos de 83,5% (IC95% 79,9–87,2%) e 89,6% (IC95% 86,4–93,0%), respectivamente. Os homens com 70-79 anos (HR=2,97; IC95% 1,11–3,87) e com 80 anos ou mais (HR=3,09; IC95% 1,31–7,27) apresentaram maior risco de mortalidade e sem diferença para as mulheres. Conclusão: O sexo feminino apresentou menor tempo entre o diagnóstico e o óbito pela doença, assim como menor probabilidade de sobrevida. Em contrapartida, foram os homens que apresentaram maior risco de mortalidade a partir dos 70 anos.

In this study, composites based on poly(lactic acid) (PLA)/talc were prepared at different compositions by melt mixing in a twin screw extruder. The effect of a nucleating agent, talc, on the crystallization behavior, rheological and morphological properties of PLA was investigated. DSC results showed that the addition of the mineral filler in the range between 1 and 5 wt. % to the PLA matrix increases the degree of crystallinity. This finding shows that talc acted as a nucleating agent for PLA during the processing stage. The composites morphology was also studied using a scanning electron microscope (SEM). The micrographs showed that a good dispersion of talc was achieved in all compositions analyzed. The rheology of PLA/talc composites was evaluated with the dynamic mode and correlated with the aforementioned observed morphology. The results showed that the addition of the mineral filler to the PLA matrix decreased system viscosity, thus highlighting the filler's lubricant effect. As talc content increased, system's viscosity also increased, providing material with higher elastic behavior. Thermal analysis showed that the composition of 3 wt.% of talc added to polymer matrix seems to be interesting with regard to the need of articles possessing good dimension stability.

The aim of this study was to incorporate an alpha-olefin (1-hexene or 1-dodecene) in a high cis polybutadiene chain, using a neodymium versatate/diisobutylaluminum hydride/t-butyl chloride catalyst system. The influence of alpha-olefin on polymerization reaction and polymer characteristics, using different weight ratios of butadiene/α-olefin, was evaluated. The copolymers were characterized by SEC, FTIR, NMR, TGA and viscosimetric analysis. The thermal stability of the polymer tended to increase with incorporation of alpha-olefins, while its microstructure was not affected. The weight average molecular mass (Mw) tended to increase and the polymerization conversion tended to decrease with increasing alpha-olefins content. The copolymers showed a lower intrinsic viscosity than for the homopolymer. The results indicated that the alpha-olefins were incorporated in the polybutadiene chain.