Vaccine coverage and effectiveness against laboratory-confirmed symptomatic and severe Covid-19 in indigenous people in Brazil: a cohort study.

BACKGROUND: Indigenous people have historically suffered devastating impacts from epidemics and continue to have lower access to healthcare and be especially vulnerable to respiratory infections. We estimated the coverage and effectiveness of Covid-19 vaccines against laboratory-confirmed Covid-19 cases among indigenous people in Brazil. METHODS: We linked nationwide Covid-19 vaccination data with flu-like surveillance records and studied a cohort of vaccinated indigenous people aged ≥ 5 years between 18th January 2021 and 1st March 2022. We considered individuals unexposed from the date they received the first dose of vaccine until the 13th day of vaccination, partially vaccinated from the 14th day after the first dose until the 13th day after receiving the second dose, and fully vaccinated onwards. We estimated the Covid-19 vaccination coverage and used Poisson regression to calculate the relative risks (RR) and vaccine effectiveness (VE) of CoronaVac, ChAdOx1, and BNT162b2 against Covid-19 laboratory-confirmed cases incidence, mortality, hospitalisation, and hospital-progression to Intensive Care Unit (ICU) or death. VE was estimated as (1-RR)*100, comparing unexposed to partially or fully vaccinated. RESULTS: By 1st March 2022, 48.7% (35.0-62.3) of eligible indigenous people vs. 74.8% (57.9-91.8) overall Brazilians had been fully vaccinated for Covid-19. Among fully vaccinated indigenous people, we found a lower risk of symptomatic cases (RR: 0.47, 95%CI: 0.40-0.56) and mortality (RR: 0.47, 95%CI: 0.14-1.56) after the 14th day of the second dose. VE for the three Covid-19 vaccines combined was 53% (95%CI:44-60%) for symptomatic cases, 53% (95%CI:-56-86%) for mortality and 41% (95%CI:-35-75%) for hospitalisation. In our sample, we found that vaccination did not reduce Covid-19 related hospitalisation. However, among hospitalised patients, we found a lower risk of progression to ICU (RR: 0.14, 95%CI: 0.02-0.81; VE: 87%, 95%CI:27-98%) and Covid-19 death (RR: 0.04, 95%CI:0.01-0.10; VE: 96%, 95%CI: 90-99%) after the 14th day of the second dose. CONCLUSIONS: Lower coverage but similar Covid-19 VE among indigenous people than overall Brazilians suggest the need to expand access, timely vaccination, and urgently offer booster doses to achieve a great level of protection among this group.

[Ethnic and racial iniquities in infant mortality: implications of changes in recording color/race in national health information systems in Brazil]. / Iniquidades étnico-raciais na mortalidade infantil: implicações de mudanças do registro de cor/raça nos sistemas nacionais de informação em saúde no Brasil.

This descriptive study aimed to discuss the repercussions of the change in the methodology for recording the color/race variable in the Brazilian Information System on Live Births (SINASC) on infant mortality rates (IMR) according to color/race in Brazil. Annual variations were analyzed in the rates of live births and infant deaths according to color/race from 2009 to 2017. The IMR according to color/race were estimated using three strategies: (1) direct method; (2) for every year, setting the same proportions of live births by color/race as observed in 2009; and (3) for every year, setting the same proportions of deaths by color/race as observed in 2009. The strategies aimed to explore the single effect of the variations in the proportions of live births or of deaths according to color/race on the estimated IMR before and after the change in the color/race variable in the SINASC database. Between 2011 and 2012 (the year of the change in the color/race variable in SINASC), there was a sudden increase in birthdates with black, brown, and indigenous color/race, along with a reduction in birthdates with white color/race, without no corresponding variations in deaths. The increase of more socially vulnerable color/race categories in the IMR denominator resulted in the attenuation of IMR for black and indigenous infants and in an increase in the IMR for white infants and consequently an artificial reduction in iniquities in infant mortality according to color/race. The change in the color/race variable in SINASC interrupted the historical series of live births by color/race, affecting indicators that potentially depend on these data for their calculation, in this case the IMR. The resulting argument is that infant mortality rates by color/race before versus after the change in the SINASC database are distinct and noncomparable indicators.

Trata-se de estudo descritivo que teve como objetivo discutir as repercussões da mudança na metodologia de coleta da variável cor/raça no Sistema de Informações sobre Nascidos Vivos (SINASC) sobre as taxas de mortalidade infantil (TMI) segundo cor/raça no Brasil. Foram analisadas as variações anuais nas frequências de nascidos vivos e óbitos infantis por cor/raça entre 2009 e 2017. As TMI por cor/raça foram estimadas segundo três estratégias: (1) método direto; (2) fixando-se, em todos os anos, as proporções de nascidos vivos por cor/raça observadas em 2009; e (3) fixando-se, em todos os anos, as proporções de óbitos por cor/raça observadas em 2009. As estratégias visaram explorar o efeito isolado das variações nas proporções de nascidos vivos ou de óbitos por cor/raça sobre as estimativas de TMI antes e após a mudança da variável cor/raça no SINASC. De 2011 para 2012 (ano de mudança da variável cor/raça no SINASC), verificou-se súbito incremento das Declarações de Nascidos Vivos (DNV) de cor/raça preta, parda e indígena, acompanhado de redução de DNV de cor/raça branca, sem variações correspondentes nos óbitos. O incremento do denominador da TMI das categorias de cor/raça socialmente mais vulnerabilizadas resultou na atenuação das TMI de pretos e indígenas, no incremento da TMI de brancos e, consequentemente, na redução artificial das iniquidades na mortalidade infantil por cor/raça. A mudança da variável cor/raça no SINASC interrompeu a série histórica de nascidos vivos por cor/raça, afetando os indicadores que potencialmente dependem desses dados para seu cálculo, como a TMI. Argumenta-se que as TMI por cor/raça antes e após a mudança no SINASC são indicadores distintos e não comparáveis.

Estudio descriptivo que tuvo como objetivo discutir las repercusiones del cambio en la metodología de recogida de la variable color/raza en el Sistema de Información sobre Nacidos Vivos (SINASC) sobre las tasas de mortalidad infantil (TMI), según color/raza en Brasil. Se analizaron las variaciones anuales en las frecuencias de nacidos vivos y óbitos infantiles por color/raza entre 2009 y 2017. Las TMI por color/raza se estimaron según tres estrategias: (1) método directo; (2) fijándose, en todos los años, las proporciones de nacidos vivos por color/raza observadas en 2009; y (3) fijándose, en todos los años, las proporciones de óbitos por color/raza observadas en 2009. Las estrategias tuvieron como objetivo explorar el efecto aislado de las variaciones en las proporciones de nacidos vivos o de óbitos por color/raza sobre las estimaciones de TMI antes y tras el cambio de la variable color/raza en el SINASC. De 2011 a 2012 (año de cambio de la variable color/raza en el SINASC), se verificó un súbito incremento de las Declaraciones de Nacidos Vivos (DNV) de color/raza negra, mestiza e indígena, acompañado de una reducción de DNV de color/raza blanca, sin variaciones correspondientes en los óbitos. El incremento del denominador de la TMI de las categorías de color/raza socialmente más vulnerabilizadas resultó en la atenuación de las TMI de negros e indígenas y en el incremento de la TMI de blancos y, consecuentemente, en la reducción artificial de las inequidades en la mortalidad infantil por color/raza. El cambio de la variable color/raza en el SINASC interrumpió la serie histórica de nacidos vivos por color/raza, afectando los indicadores que potencialmente dependen de esos datos para su cálculo, como la TMI. Se argumenta que las TMI por color/raza antes y después del cambio en el SINASC son indicadores distintos y no comparables.

Vozes indígenas na saúde: trajetórias, memórias e protagonismos / Indigenous voices in health: trajectories, memories and protagonisms

Analisa histórias sobre a saúde indígena por meio de narrativas dos próprios indígenas que apresentam a temática da saúde a partir de seis olhares, memórias e experiências. Traz relatos de conquistas, retrocessos e desafios nas lutas dos movimento e na implementação da saúd einídgena, considerando as realidades específicas e diferenciadas vividas por esses povos.

Iniquidades étnico-raciais na mortalidade infantil: implicações de mudanças do registro de cor/raça nos sistemas nacionais de informação em saúde no Brasil / Ethnic and racial iniquities in infant mortality: implications of changes in recording color/race in national health information systems in Brazil / Inequidades étnico-raciales en la mortalidad infantil: implicaciones de cambios del registro de color/raza en los sistemas nacionales de información en salud en Brasil

Trata-se de estudo descritivo que teve como objetivo discutir as repercussões da mudança na metodologia de coleta da variável cor/raça no Sistema de Informações sobre Nascidos Vivos (SINASC) sobre as taxas de mortalidade infantil (TMI) segundo cor/raça no Brasil. Foram analisadas as variações anuais nas frequências de nascidos vivos e óbitos infantis por cor/raça entre 2009 e 2017. As TMI por cor/raça foram estimadas segundo três estratégias: (1) método direto; (2) fixando-se, em todos os anos, as proporções de nascidos vivos por cor/raça observadas em 2009; e (3) fixando-se, em todos os anos, as proporções de óbitos por cor/raça observadas em 2009. As estratégias visaram explorar o efeito isolado das variações nas proporções de nascidos vivos ou de óbitos por cor/raça sobre as estimativas de TMI antes e após a mudança da variável cor/raça no SINASC. De 2011 para 2012 (ano de mudança da variável cor/raça no SINASC), verificou-se súbito incremento das Declarações de Nascidos Vivos (DNV) de cor/raça preta, parda e indígena, acompanhado de redução de DNV de cor/raça branca, sem variações correspondentes nos óbitos. O incremento do denominador da TMI das categorias de cor/raça socialmente mais vulnerabilizadas resultou na atenuação das TMI de pretos e indígenas, no incremento da TMI de brancos e, consequentemente, na redução artificial das iniquidades na mortalidade infantil por cor/raça. A mudança da variável cor/raça no SINASC interrompeu a série histórica de nascidos vivos por cor/raça, afetando os indicadores que potencialmente dependem desses dados para seu cálculo, como a TMI. Argumenta-se que as TMI por cor/raça antes e após a mudança no SINASC são indicadores distintos e não comparáveis.

This descriptive study aimed to discuss the repercussions of the change in the methodology for recording the color/race variable in the Brazilian Information System on Live Births (SINASC) on infant mortality rates (IMR) according to color/race in Brazil. Annual variations were analyzed in the rates of live births and infant deaths according to color/race from 2009 to 2017. The IMR according to color/race were estimated using three strategies: (1) direct method; (2) for every year, setting the same proportions of live births by color/race as observed in 2009; and (3) for every year, setting the same proportions of deaths by color/race as observed in 2009. The strategies aimed to explore the single effect of the variations in the proportions of live births or of deaths according to color/race on the estimated IMR before and after the change in the color/race variable in the SINASC database. Between 2011 and 2012 (the year of the change in the color/race variable in SINASC), there was a sudden increase in birthdates with black, brown, and indigenous color/race, along with a reduction in birthdates with white color/race, without no corresponding variations in deaths. The increase of more socially vulnerable color/race categories in the IMR denominator resulted in the attenuation of IMR for black and indigenous infants and in an increase in the IMR for white infants and consequently an artificial reduction in iniquities in infant mortality according to color/race. The change in the color/race variable in SINASC interrupted the historical series of live births by color/race, affecting indicators that potentially depend on these data for their calculation, in this case the IMR. The resulting argument is that infant mortality rates by color/race before versus after the change in the SINASC database are distinct and noncomparable indicators.

Estudio descriptivo que tuvo como objetivo discutir las repercusiones del cambio en la metodología de recogida de la variable color/raza en el Sistema de Información sobre Nacidos Vivos (SINASC) sobre las tasas de mortalidad infantil (TMI), según color/raza en Brasil. Se analizaron las variaciones anuales en las frecuencias de nacidos vivos y óbitos infantiles por color/raza entre 2009 y 2017. Las TMI por color/raza se estimaron según tres estrategias: (1) método directo; (2) fijándose, en todos los años, las proporciones de nacidos vivos por color/raza observadas en 2009; y (3) fijándose, en todos los años, las proporciones de óbitos por color/raza observadas en 2009. Las estrategias tuvieron como objetivo explorar el efecto aislado de las variaciones en las proporciones de nacidos vivos o de óbitos por color/raza sobre las estimaciones de TMI antes y tras el cambio de la variable color/raza en el SINASC. De 2011 a 2012 (año de cambio de la variable color/raza en el SINASC), se verificó un súbito incremento de las Declaraciones de Nacidos Vivos (DNV) de color/raza negra, mestiza e indígena, acompañado de una reducción de DNV de color/raza blanca, sin variaciones correspondientes en los óbitos. El incremento del denominador de la TMI de las categorías de color/raza socialmente más vulnerabilizadas resultó en la atenuación de las TMI de negros e indígenas y en el incremento de la TMI de blancos y, consecuentemente, en la reducción artificial de las inequidades en la mortalidad infantil por color/raza. El cambio de la variable color/raza en el SINASC interrumpió la serie histórica de nacidos vivos por color/raza, afectando los indicadores que potencialmente dependen de esos datos para su cálculo, como la TMI. Se argumenta que las TMI por color/raza antes y después del cambio en el SINASC son indicadores distintos y no comparables.

Indigenous migration patterns in Brazil based on the 2010 national demographic census: analysis and critical reflection.

Research in several Latin American countries points to violence, loss of traditional territories, and seeking education, health, and wage labor as key variables in triggering rural-urban migration among Indigenous people. This study presents an analysis of the migration patterns of Indigenous people in Brazil, compared to non-indigenous people, based on data from the most recent national census, conducted in 2010. Migration characteristics related to lifetime migration and recent migration were investigated by means of descriptive and multivariable logistic regression analyses. The findings pointed to complex mobility scenarios according to migrants' Indigenous status and geographical regions of origin and destination. Indigenous people living in urban areas presented high levels of mobility (approximately 50% lived in different municipalities from those where they were born), which were more pronounced than those of non-Indigenous people. Indigenous people living in rural areas presented the lowest levels of migration (approximately 90% residing in their municipality of birth). Statistical modeling confirmed the patterns observed in descriptive analysis, highlighting the marked mobility of Indigenous subjects in urban areas. We emphasize the limitations of using census data for characterizing Indigenous mobility profiles, although no other nationally representative data are available. The finding that the Indigenous population living in urban areas presents rates of migration higher than their non-Indigenous counterparts is particularly important for the planning and implementation of a broad range of public policies aimed at ethnic minorities in the country, including health, education, and housing initiatives.

Birth weight of indigenous children in Brazil: results of the First National Survey of Indigenous People's Health and Nutrition.

Birth weight is an important predictor of perinatal, infant, and preschool-age children morbimortality. However, information about indigenous children's birth weight is still scarce. This study aimed to analyze the birth weight of indigenous children based on data from the First National Survey of Indigenous People's Health and Nutrition, Brazil (2008-2009). This is the first study to address indigenous children's birth weight based on a nationwide representative sample. Mean birth weights and the respective standard deviations were calculated according to geopolitical region, sex, type of birth, and birthplace. The chi-square test was used to analyze differences in proportions, and Kruskal-Wallis and Mann-Whitney U tests in means, considering sample design and data normality. We found no records on birth weight in the researched documents for 26.7% of the 6,128 sampled children. The mean birth weight for the 3,994 children included in the analyses was 3,201g (standard deviation - SD ± 18.6g), regardless of sex, type of birth, and birthplace. The prevalence of low birth weight was 7.6% (n = 302) and was significantly higher among girls. Boys presented significantly higher mean birth weight than girls, regardless of the geopolitical region. Low birth weight was slightly less frequent among indigenous children when compared to Brazilian children in general. Our study indicates the need to improve prenatal care and the quality of consultation records for indigenous women as a strategy to promote safe pregnancy and childbirth.

Socioeconomic determinants of excess weight and obesity among Indigenous women: findings from the First National Survey of Indigenous People's Health and Nutrition in Brazil.

OBJECTIVE: This article assesses the nutritional status of Indigenous women from 14 to 49 years of age in Brazil. DESIGN: Sample size was calculated for each region considering a prevalence of 50 % for all disease outcomes, a relative error of 5 % and a CI of 95 %. In the initial data analysis, the prevalence of excess weight and obesity was calculated according to independent variables. Multivariate multilevel hierarchical analyses were conducted based on a theoretical model of two ranked blocks. SETTING: The 2010 Indigenous population in Brazil was 896 000, with approximately 300 Indigenous ethnic groups, making Brazil one of the most ethnically diverse countries in the Americas and the world. PARTICIPANTS: Of the total target sample of 6722 women evaluated by the National Survey, thirty did not participate, 939 were not eligible for analyses due to pregnancy or unknown pregnancy status, and thirty-nine were excluded due to missing anthropometric data. RESULTS: The evaluation of nutritional status was completed for 5714 non-pregnant women (99·3 % of eligible participants for this outcome). High prevalence rates were encountered for both excess weight (46·2 %) and obesity (15·8 %) among the sampled women. In the multivariate analyses, higher socioeconomic indicators, market-integrated living conditions and less reliance on local food production, as well as increased age and parity were associated with excess weight and obesity. CONCLUSION: Results point to distinct patterns of associations between socioeconomic indicators and the occurrence of excess weight and obesity among Indigenous women, which have potentially significant implications from a public policy perspective for Indigenous peoples in Brazil.

Políticas antes da política de saúde indígena

Apresenta os contextos e atores no cenário da (in)visibilidade da saúde indígena, as trajetórias e articulações na formulação do subsistema.

Birth weight of indigenous children in Brazil: results of the First National Survey of Indigenous People's Health and Nutrition / Peso ao nascer de crianças indígenas no Brasil: resultados do Primeiro Inquérito Nacional de Saúde e Nutrição dos Povos Indígenas / Peso al nacer de niños indígenas en Brasil: resultados de la Primera Encuesta Nacional sobre la Salud y Nutrición de los Pueblos Indígenas

Birth weight is an important predictor of perinatal, infant, and preschool-age children morbimortality. However, information about indigenous children's birth weight is still scarce. This study aimed to analyze the birth weight of indigenous children based on data from the First National Survey of Indigenous People's Health and Nutrition, Brazil (2008-2009). This is the first study to address indigenous children's birth weight based on a nationwide representative sample. Mean birth weights and the respective standard deviations were calculated according to geopolitical region, sex, type of birth, and birthplace. The chi-square test was used to analyze differences in proportions, and Kruskal-Wallis and Mann-Whitney U tests in means, considering sample design and data normality. We found no records on birth weight in the researched documents for 26.7% of the 6,128 sampled children. The mean birth weight for the 3,994 children included in the analyses was 3,201g (standard deviation - SD ± 18.6g), regardless of sex, type of birth, and birthplace. The prevalence of low birth weight was 7.6% (n = 302) and was significantly higher among girls. Boys presented significantly higher mean birth weight than girls, regardless of the geopolitical region. Low birth weight was slightly less frequent among indigenous children when compared to Brazilian children in general. Our study indicates the need to improve prenatal care and the quality of consultation records for indigenous women as a strategy to promote safe pregnancy and childbirth.

O peso ao nascer é um importante preditor de morbimortalidade perinatal, infantil e pré-escolar. São escassas as informações sobre o peso ao nascer das crianças indígenas no Brasil. O estudo teve como objetivo analisar o peso ao nascer das crianças indígenas, com base nos dados do Primeiro Inquérito Nacional de Saúde e Nutrição dos Povos Indígenas, Brasil (2008-2009). Este é o primeiro estudo a avaliar o peso ao nascer de crianças indígenas com base em uma amostra nacional representativa. Foram calculadas as médias e desvios-padrão de acordo com macrorregião, sexo, tipo e parto e local do parto. Foram utilizados o teste de qui-quadrado para analisar as diferenças de proporções e os testes de Kruskal-Wallis e U de Mann-Whitney para diferenças nas médias, considerando o desenho amostral do estudo e a normalidade dos dados. Para 26,7% das 6.128 crianças da amostra, não foi possível localizar qualquer registro de peso ao nascer nos documentos consultados. Entre as 3.994 crianças incluídas nas análises, o peso médio ao nascer, independentemente de sexo, tipo de parto e local do parto, foi 3.201g (desvio padrão - DP ± 18,6g). A prevalência de baixo peso ao nascer foi 7,6% (n = 302), significativamente mais alta em meninas. Os meninos apresentaram peso médio ao nascer significativamente mais alto que as meninas, independentemente de região. A frequência de baixo peso ao nascer foi ligeiramente mais baixa que nas crianças brasileiras em geral. O estudo aponta para a necessidade de melhorar a assistência pré-natal e a qualidade dos registros das consultas das mulheres indígenas, como estratégia para promover a segurança na gravidez e no parto.

El peso al nacer es un predictor importante de morbimortalidad perinatal, infantil y preescolar. La información sobre el peso al nacer de niños indígenas es escasa. El objetivo de este estudio fue analizar el peso al nacer de los niños indígenas, basado en datos de la Primera Encuesta Nacional de Salud y Nutrición de los Pueblo Indígenas, Brasil (2008-2009). Se trata del primer estudio dirigido al peso al nacer de niños indígenas, basado en una muestra representativa nacionalmente. Las medias y las respectivas desviaciones estándar del peso al nacer se calcularon según la región geopolítica, sexo, tipo de nacimiento y localización del mismo. Se usó un test chi-cuadrado para analizar las diferencias en proporciones y las pruebas Kruskal-Wallis y de la U de Mann-Whitney para las diferencias en las medias, considerando el diseño de la muestra del estudio y normalidad de los datos. Para un 26,7% de los 6.128 niños incluidos en la muestra no fue posible localizar ningún registro de peso al nacer en los documentos investigados. De los 3.994 niños incluidos en el análisis, la media de peso al nacer, independiente del sexo, tipo de nacimiento, y lugar de nacimiento, fue 3.201g (desviación estándar - SD ± 18,6g). La prevalencia del bajo peso al nacer fue 7,6% (n = 302) y fue significativamente más alta entre niñas. Los niños presentaron significativamente una media más alta de peso al nacer que las niñas, independientemente de la región. La frecuencia del bajo peso al nacer fue ligeramente más baja que la observada en niños brasileños en general. Este estudio presenta aspectos que se necesitan mejorar en el cuidado prenatal y en la calidad de los registros de las consultas de mujeres indígenas, como una estrategia para promover un embarazo y parto seguros.

Health reform and Indigenous health policy in Brazil: contexts, actors and discourses.

Given the challenges related to reducing socio-economic and health inequalities, building specific health system approaches for Indigenous peoples is critical. In Brazil, following constitutional reforms that led to the universalization of health care in the late 1980s, a specific health subsystem was created for Indigenous peoples in 1999. In this paper, we use a historical perspective to contextualize the creation of the Indigenous Health Subsystem in Brazil. This study is based on data from interviews with Indigenous and non-Indigenous subjects and document-based analysis. In the 1980s, during the post-dictatorship period in Brazil, the emergence of Indigenous movements in the country and the support for pro-Indigenous organizations helped establish a political agenda that emphasized a broad range of issues, including the right to a specific health policy. Indigenous leaders established alliances with participants of the Brazilian health reform movement, which resulted in broad debates about the specificities of Indigenous peoples, and the need for a specific health subsystem. We highlight three main points in our analysis: (1) the centrality of a holistic health perspective; (2) the emphasis on social participation; (3) the need for the reorganization of health care. These points proved to be convergent with the development of the Brazilian health reform and were expressed in documents of the Indigenist Missionary Council (CIMI) and the Union of Indigenous Nations (UNI). They were also consolidated in the final report of the First National Conference on the Protection of Indigenous Health in 1986, becoming the cornerstone of the national Indigenous health policy declared in 1999. Our analysis reveals that Indigenous people and pro-Indigenous groups were key players in the development of the Indigenous Health Subsystem in Brazil.