Demographic Density Research Articles

Delimitation of Differentiated Management Units (DMUs) based on productivity maps, slope maps and vegetation indices

According to several projections, the planet's demographic density will continue to increase in the coming decades, a fact that makes it necessary to increase food production to meet population demand. However, there are factors that can make it difficult to achieve production goals, such as the high cost of inputs. Therefore, aiming to increase productivity and reduce costs through optimizing the use of resources and the area available for production, it is necessary to implement alternatives to traditional production control methods. In this aspect, precision agriculture stands out. For precision agriculture to be applied to crops, it is first necessary to observe the spatial and temporal variability of the area, through georeferenced data on the attributes that involve the production system. The correlation of these attributes can indicate sub-regions within the production areas that can receive homogeneous treatment; these fractions of the area can also be called Differentiated Management Units (DMUs). Therefore, the objective of this study was to evaluate the viability of DMU delimitations using data on productivity, slope and vegetation indices, referring to the 2020 harvest for corn cultivation. To this end, geoprocessing of the data obtained using the QGIS software was carried out, so that 3 DMUs were generated for the area evaluated in the study. Thus, the DMUs were compared with the 2021 corn harvest. The results show that the DMUs, produced with data from the 2020 corn harvest, delimited regions with different productivity data in the 2021 harvest, indicating that the possibility of obtaining better parameters in production if differentiated management were carried out in the field, and such planning can be carried out based on the assessments that DMUs allow to be carried out.

Intersectional equity in Brazil's remote rural municipalities: the road to efficiency and effectiveness in local health systems.

The Brazilian remote rurality has been classified more reliably only recently, according to demographic density, proportion of urban population, and accessibility to urban centers. It comprises 5.8% of the municipalities, in nearly half of the states, with a population of 3,524,597 (1.85%). Remote rural localities (RRL) have reduced political/economic power, facing greater distances and barriers. Most health strategies are developed with the urban space in mind. We aim to understand how RRL are positioned concerning efficiency/effectiveness in health, compared to other urban-rural typologies of Brazilian localities, focusing on Primary Health Care (PHC), and its organizational models. We evaluated the efficiency and effectiveness of the organizational models using the health production model, from 2010-2019, gradually deepening the immersion into the RRL reality. We analyzed the human and financial resources dimensions, emphasizing teams, the results of PHC actions, and health levels. We used the fixed effects model and data envelopment analysis, cross-sectioned by intersectional inequities. We compared the Brazilian states with and without RRL, Brazilian municipalities according to rural-urban typologies, and RRL clusters. Brazilian RRL states show superior resource/health efficiency through services utilization according to health needs. The remote rural typology demonstrated greater efficiency and effectiveness in health than the other typologies in the RRL states. The organizational models with the Family Health Strategy (FHS) teams and the Community Health Worker (CHW) visits played a key role, together with local per capita health expenditures and intergovernmental transfers. Thus, financial resources and health professionals are essential to achieve efficient/effective results in health services. Among the RRL, the Amazon region clusters stand out, denoting the importance of riverine and fluvial health teams, the proportion of diagnostic/treatment units in addition to the proportion of illiteracy and adolescent mothers along with the inequity of reaching high levels of schooling between gender/ethnicity. Hopefully, these elements might contribute to gains in efficiency and effectiveness, prioritizing the allocation of financial/human resources, mobile FHS teams, availability of local diagnosis/treatment, and basic sanitation. Finally, one should aim for equity of gender/ethnicity in income and education and, above all, of place, perceived in its entirety.

Assessment of water quality and identification of priority areas for intervention in Guanabara Bay basin, Rio de Janeiro, Brazil, using nonparametric and multivariate statistical methods.

The Guanabara Bay hydrographic region (GBHR) has served as a central hub for human settlement and resource utilization throughout Brazil's history. However, the region's high population density and intense industrial activity have come at a cost, leading to a significant decline in water quality. This work aimed to identify homogeneous regions in GBHR according to water quality parameters in dry and rainy periods. The following water quality monitoring variables were monitored at 49 gauge stations: total phosphorus (TP), nitrate (NO3-), dissolved oxygen (DO), hydrogenionic potential (pH), turbidity (Turb), thermotolerant coliforms (TCol), total dissolved solids (TDS), biochemical oxygen demand (BOD), water temperature (Tw), and air temperature (Ta). The statistical analysis consisted of determining principal components, cluster analysis, seasonal differences, and Spearman's correlation. The water quality parameter correlations were not expressively influenced by seasonality, but there are differences in the concentrations of these parameters in the dry and rainy periods. In the dry period, urban pressure on water quality is mainly due to fecal coliforms. The resulting clusters delimited areas under urban, agricultural, and forestry influence. Clusters located in areas with high demographic density showed high concentrations of TCol and TP, while clusters influenced by forestry and agriculture had better water quality. In the rainy season, clusters with urban influence showed problems with TCol and TP, in addition to some characteristics in each group, such as high TDS, NO3-, and BOD. Forested areas showed high DO, and clusters under agricultural influence had higher concentrations of TCol, BOD, and NO3- concerning forested regions. The troubling state of sanitation in GBHR occurs in metropolitan regions due to lack of a formal sanitation system.

Study of Ontogenetic Structure and Density of the Coenopopulation of Hedysarum atropatanum Bunge ex Boiss. Flora of Daridag

The article presents findings from a study of the demographic structure and density of the population of the species Hedysarum atropatanum Bunge ex Boiss., which is widely distributed in the Daridag area. A total of ten ontogenetic states (seed, seedling, juvenile, immature, virginile, young generative, middle aged generative, aged generative, subsenile and senile) of the H. atropatanum species were observed. The processes of ontogenesis, which can be classified as normal, fast, or slow, were identified as the primary mechanisms driving species evolution. Additionally, instances of developmental disruptions, rejuvenation, and the manifestations of aging were observed. The majority of individuals belonging to the species H. atropatanum exhibit a normal to rapid growth rate. It has been observed that the process of ontogenesis is slower in areas with high plant density. It was determined that the secondary quiescence period does not manifest during the initial stages of development; rather, it becomes feasible only after the individuals have reached the virginal state. It has not been observed that immature individuals bypass the virginal state and immediately transition to mature generative plants. The vitality status of the individuals was determined based on a comprehensive analysis of multiple morphological traits, including the height of the specimens, the number of shoots, the number of flower carriers, the length of the leaves, the size of the leaves, and the number of flowers in the flower group. Following the statistical processing of the data, three classes of vitality were identified. A study revealed that individuals of the second vitality level of the H. atropatanumspecies are more prevalent in the coenopopulation. The optimal habitats of the H. atropatanum s

Citizens’ assemblies in Brazil: an analysis of the role of mini-publics on building democratic participatory climate public policies

This article aims to explore how Brazilian city-level public officials have used citizens’ assemblies to implement climate policies effectively in communities where other emergencies require political action. We analyze the implementation of citizens’ assemblies on climate change in three Brazilian cities in different regions, with distinct demographic densities, social development rates, and mayors’ political affiliations. Cities are where people experience the most consequences of climate change. In the Brazilian context, the Bolsonaro federal administration has weakened both environmental and citizen participation policies. This adds to previously known challenges for policy making in the issue, including countering the interests of some industries and the construction sector. Citizens’ assemblies are a democratic innovation that promotes the inclusion of the population in the development of public policies, particularly in times of democratic crisis. In this study, we examine the implementation process of citizens’ assemblies in Brazil through interviews and documentary analysis of experiences implemented by the Brazilian NGO Delibera Brasil. This research offers valuable insights into the role of citizens’ assemblies as catalysts for informed and participatory climate policymaking in Brazilian municipalities.

How explain on-grid PV systems diffusion? Review and application in Brazil

This paper examines the remarkable growth of photovoltaic (PV) solar energy technology in Brazil, which stands out among the leading countries in photovoltaic installations. The recent implementation of Law 14300 on grid-connected PV systems has caused a stir in the Brazilian market, with investors anticipating installations to avoid reductions in benefits. This phenomenon, previously observed in Europe, instigates an understanding of the variables underlying the exponential growth of the Brazilian market. This study seeks to identify the predictors that explain the PV systems diffusion in Brazil, in two stages: a systematic review of the literature to map approaches and methods, followed by the construction of a database and the application of predictive models. The literature revealed 24 methods in six approaches, with 44 predictors. For Brazil, the database contains 90,129 instances, 22 predictors, and covers all 5570 municipalities. The results highlight the crucial importance of the electricity tariff as the main predictor, followed by irradiation and municipal Gross Domestic Product. Predictors such as the number of companies, minimum wage, HDI education, demographic density, and vehicle fleet prove to be relevant. In conclusion, the spatially explicit analysis highlights the complexity of the market, offering valuable implications for energy planners and stakeholders.

A Sustainable Restoration Plan for Gaza

Purpose: Since the outbreak of the Gaza war, innumerable discussions for resolving the conflict have emerged considering governance, security, equity and feasibility. Any discussion involving the aftermath of the fighting in this embattled area must also include a focus on sustainability. The article highlights the primary environmental challenges associated with post-war ecological restoration. Methodology: This article represents an historical analysis, reporting the results of a desk study, based on academic sources, reports of internation agencies, civil society and government data. Findings: In recent decades, Gaza’s environment increasingly reflects the adverse impacts of mounting demographic density, resource exploitation, poor management and significant contamination. Degraded ground water quality, sewage contamination of coastal waters and debris from inadequate solid waste infrastructure, traditionally, have been the primary environmental hazards. The ongoing military conflict has only exacerbated these acute problems, adding additional risks from airborne particles from the massive damage sustained by local buildings, especially when structures contain asbestos. Unique Contribution to Theory, Practice and Policy: The article offers a brief historic review of Gaza’s natural resources, the drivers of the acute environmental degradation and priority action items for a sustainable strategy for Gaza and its residents’ future.

Forest fire risk zoning for the metropolitan region of Curitiba, Paraná, Brazil

Forest fires are becoming increasingly frequent throughout the globe, influencing socioeconomic and environmental aspects and endangering ecosystems and life. The forest fire risk zoning is an auxiliary tool for elaborating and implementing preventive policies. The present study aims to execute the forest fire risk zoning for the metropolitan region of Curitiba, Paraná, Brazil, testing its efficiency through the relationship with geolocated fires that occurred from 2011 to 2016. Thematic maps were made through information related to demographic density, road system, land use and cover, slope, orientation and altimetry of the terrain. The efficiency of the proposed zoning, 45.8% and 44.0% of the geolocated fires that occurred in the study area in the period 2011 to 2016 were present in areas considered with "very high" and "high" risk, respectively, demonstrating that the proposed zoning can be used to develop prevention policies for the metropolitan region of Curitiba.

Socio-Economic and Demographic Factors Affecting Adoption of Electric Vehicles in India

The purpose of this study is to analyze the diverse socio-economic and demographic determinants that impact the adoption and growth of electric vehicles (EVs) in India. Quantitative research was conducted utilizing data from the Prowess IQ database. Growth of Electric Vehicles (GEV) is represented through the proxy of total income of ten prominent Indian EV manufacturing companies for eight years from 2016 to 2023. This is analyzed against nine independent variables including GDP, Per Capita Income, Age of Company, Population Density, Average Petrol/Diesel Price, Price of Electricity Per Unit, Average Household Electricity Consumption, and Vehicle Electricity Consumption, data for which was extracted from governmental and company websites. The study employed statistical methods, such as correlation and regression analysis, to examine the associations between the dependent and independent variables. The results depict notable positive correlations with GDP, per capita income, age of company, and population density, and negative correlations with the price of electricity and diesel. Regression analysis further substantiated six variables (population density, petrol prices, per capita income, GDP, diesel prices, and average household electricity consumption) as statistically significant contributors to GEV in India These findings point towards the need to leverage the positive drivers and mitigate the effects of negative correlates. Policies offering financial support tailored to demographic and economic contexts, might help achieve accelerated and sustainable growth for EVs in India. This study highlights the unique impact of demographic elements like population density on the EV market in India.

A Territorial Strategy for the Activation of Tourism in Low Population Density Heritage Landscapes

Sustainable and balanced territory development involves management and planning based on the cultural and natural values that characterise it. In contrast to solutions based exclusively on quantitative growth, today, we defend qualitative territorial planning based on specific characteristics and identity what, ultimately, is the heritage content and significance of the territory. In line with these arguments, this article reflects on the need to design territorial planning strategies to activate territories with low demographic density through their heritage and landscape values, specifically referring to rural areas made up of small, scattered population centres. The wide territorial dispersion of these settlements, which represent a large proportion of Latin American and European territory, calls for specific planning and management models and criteria. This article proposes a territorial strategy for these sites aimed at sustainable tourism activation through itineraries and potential identity facilities. The application of the strategy is shown in a pilot case study of the island of Fuerteventura (Canary Islands, Spain).

Urban green space exposure is low and unequally distributed in an Amazonian metropolis

AbstractUrban green spaces are important for interactions between people and non-human nature, with their associated health and well-being impacts, although their distribution is often unequal. Here, we characterize the distribution of urban green spaces in Belém, the largest city in the Amazon Delta, and relate it to levels of human development and social vulnerability across the city; this is the first such analysis to be conducted for a Brazilian Amazon city. We first conducted a supervised maximum likelihood classification of images at 5–m spatial resolution taken in 2011 by the RapidEye satellites to map the distribution of green space across the urban part of the municipality of Belém. We then calculated two measures of urban green space at the level of human development units: the proportional cover of vegetation (Vegetation Cover Index; VCI) and the area of vegetation per person (Vegetation Cover per Inhabitant; VCPI), and we used hurdle models to relate them to two measures of socioeconomic status: the Social Vulnerability Index and the Human Development Index, as well as to demographic density. We find that VCI and VCPI are higher in more socially vulnerable areas. We explain how this pattern is driven by historical and ongoing processes of urbanization, consider access to urban green space and the benefits to human health and well-being and discuss equitable planning of urban green space management in the Amazon. We conclude that the assumption that urban greening will bring health benefits risks maintaining the status quo in terms of green exclusion and repeating historical injustices via displacement of socially vulnerable residents driven by demand for access to urban green spaces.

Assessing vulnerability for future Zika virus outbreaks using seroprevalence data and environmental suitability maps.

The 2015-17 Zika virus (ZIKV) epidemic in the Americas subsided faster than expected and evolving population immunity was postulated to be the main reason. Herd immunization is suggested to occur around 60-70% seroprevalence, depending on demographic density and climate suitability. However, herd immunity was only documented for a few cities in South America, meaning a substantial portion of the population might still be vulnerable to a future Zika virus outbreak. The aim of our study was to determine the vulnerability of populations to ZIKV by comparing the environmental suitability of ZIKV transmission to the observed seroprevalence, based on published studies. Using a systematic search, we collected seroprevalence and geospatial data for 119 unique locations from 37 studies. Extracting the environmental suitability at each location and converting to a hypothetical expected seroprevalence, we were able to determine the discrepancy between observed and expected. This discrepancy is an indicator of vulnerability and divided into three categories: high risk, low risk, and very low risk. The vulnerability was used to evaluate the level of risk that each location still has for a ZIKV outbreak to occur. Of the 119 unique locations, 69 locations (58%) fell within the high risk category, 47 locations (39%) fell within the low risk category, and 3 locations (3%) fell within the very low risk category. The considerable heterogeneity between environmental suitability and seroprevalence potentially leaves a large population vulnerable to future infection. Vulnerability seems to be especially pronounced at the fringes of the environmental suitability for ZIKV (e.g. Sao Paulo, Brazil). The discrepancies between observed and expected seroprevalence raise the question: "why did the ZIKV epidemic stop with large populations unaffected?". This lack of understanding also highlights that future ZIKV outbreaks currently cannot be predicted with confidence.

The MAPSTROKE project: A computational strategy to improve access to acute stroke care.

Global access to acute stroke treatment is variable worldwide, with notable gaps in low and middle-income countries (LMIC), especially in rural areas. Ensuring a standardized method for pinpointing the existing regional coverage and proposing potential sites for new stroke centers is essential to change this scenario. To create and apply computational strategies (CSs) to determine optimal locations for new acute stroke centers (ASCs), with a pilot application in nine Latin American regions/countries. Hospitals treating acute ischemic stroke (AIS) with intravenous thrombolysis (IVT) and meeting the minimum infrastructure requirements per structured protocols were categorized as ASCs. Hospitals with emergency departments, noncontrast computed tomography (NCCT) scanners, and 24/7 laboratories were identified as potential acute stroke centers (PASCs). Hospital geolocation data were collected and mapped using the OpenStreetMap data set. A 45-min drive radius was considered the ideal coverage area for each hospital based on the drive speeds from the OpenRouteService database. Population data, including demographic density, were obtained from the Kontur Population data sets. The proposed CS assessed the population covered by ASCs and proposed new ASCs or artificial points (APs) settled in densely populated areas to achieve a target population coverage (TPC) of 95%. The observed coverage in the region presented significant disparities, ranging from 0% in the Bahamas to 73.92% in Trinidad and Tobago. No country/region reached the 95% TPC using only its current ASCs or PASCs, leading to the proposal of APs. For example, in Rio Grande do Sul, Brazil, the introduction of 132 new centers was suggested. Furthermore, it was observed that most ASCs were in major urban hubs or university hospitals, leaving rural areas largely underserved. The MAPSTROKE project has the potential to provide a systematic approach to identify areas with limited access to stroke centers and propose solutions for increasing access to AIS treatment. Data used for this publication are available from the authors upon reasonable request.

Excess Mortality Stratified by Age and Sex for Croatia and Croatian Counties during the 2020-2021 COVID-19 Pandemic.

Excess mortality is often used to estimate the effect of a certain crisis on the population. It is defined as the number of deaths during a crisis exceeding the expected number based on historical trends. Here, we calculated excess mortality due to the COVID-19 pandemic for Croatia in the 2020-2021 period. The excess was calculated on the national and county level for different age and sex categories. In addition to the absolute number, the excess mortality was also expressed as a ratio of excess deaths to the predicted baseline and excess mortality rate. We showed that using both measures is necessary to avoid incorrect conclusions. The estimated excess mortality on the national level was 14,963, corresponding to an excess percentage of 14.3%. With respect to sex, there was a higher excess mortality rate for men compared to women. An exponential relationship was observed between age and the excess mortality rate.These trends wee representative of most counties as well, with large variations in the magnitude of the effect. However, there were also exceptions to the general rule. The reasons for these deviations were discussed in terms of between-county differences in demographic structure, population density and special events that took place during the pandemic.

FLUORIDATION AND DISPOSAL OF PUBLIC WATER SUPPLY IN THE MARANHÃO AMAZON

Objective: to investigate access and fluoridation of public water supplies in the state of Maranhão. Method: descriptive, direct documentary research, carried out in governmental databases in 2022, also on-site surveys involving 23 municipalities in Maranhão Amazon belonging to the health macro-region IV. The investigated aspects were: population supplied by water; raw water sources; responsible body; water fluoridation and data availability. Only 38% of the population in the macro-region have access to piped water, of which only 44% is treated, the service performed by the state company and those managed by the municipal body were equivalent (48%). 484 sources of collection were identified, 99% underground supplying 92% of the population, this dependence on groundwater reaches 63% throughout the state, surface collection occurs only in the main municipality (5%). Despite the index that 91% of indicator 6.1.1 of the SDGs, the high rural population and the low demographic density constitute a challenge for the expansion of access. No municipality performs artificial fluoridation and there are no records of fluoride levels or previous analyses. There is a direct relationship between a lower HDI and access to potable water. Conclusion: a small part of the population has access to treated water, therefore fluoridation is not guaranteed and the surveillance system needs to be improved.

The eutrophication process in the lagoon systems of eastern Rio de janeiro investigated through the analysis of sedimentary phosphorus and historic of basin occupation

Lagoons along the eastern coast of Rio de Janeiro serve as vital corridors for the preservation of marine and coastal biodiversity. However, these ecosystems are facing substantial threats stemming from environmental degradation and cultural eutrophication. This study aims to investigate the process of eutrophication by analyzing sedimentary environments in coastal lagoons located in the municipalities of (Itaipu) Niterói, (Fora) Saquarema, and Araruama (São Pedro da Aldeia). The investigation involves the analysis of sedimentary records collected at various times in each lagoon, with particular focus on phosphorus content and grain size distribution, emphasizing silt, clay and sand fractions. These analyses are correlated with the historical population growth in the drainage basins. Our working hypothesis posits that the impacts of urbanization on the degradation of lagoon systems are archived within the sedimentary records. It is anticipated that the extent and magnitude of these impacts are correlated with population density. The notable increase in demographic density can be attributed to the inauguration of the Rio-Niteroi Bridge, resulting in a significant influx of residents and tourists into the coastal region in question. This hypothesis is supported by census data, which reveal substantial population growth in coastal areas. In addition, this study utilizes ordination analysis, specifically Principal Component Analysis (PCA), to classify sedimentary layers based on their depositional characteristics. The PCA allows for the categorization of sedimentary data, unveiling changes in erosion and sedimentarion patterns. Remarkably, our research stablishes a significant correlation between the escalating total phosphorus fluxes and population growth, thereby providing valuable insights into the historical progression of cultural eutrophication within the coastal lagoon systems of eastern Rio de Janeiro. Overall, our findings contribute to an enhanced understanding of how urbanization and population dynamics have influenced the eutrophication process within there vital coastal ecosystems over the past five decades.

Did the association between alcohol outlet density and crime change during COVID shelter-in-place orders?

We investigated whether greater concentrations of on- and off-sale alcohol outlets were associated with crime and whether this association was moderated by COVID-19 shelter-in-place orders (SIP) that restricted on-premises consumption of alcohol. Crimes (2019-2020) and addresses of licenced alcohol outlets in a medium-sized California city were geocoded within census block groups (N = 61). On- and off-sale alcohol outlet density was calculated as licenced outlets/2.59 km2 (1 square mile). Multilevel negative binomial regression analyses were conducted to examine associations between alcohol outlet density and crime, and possible moderating effects of SIP, controlling for block group demographic characteristics and density of other retail businesses. On-sale outlet density was positively associated with total crimes and Part 2 crimes, while off-sale outlet density was inversely associated with total crime and Part 2 crimes. Overall, SIP was not significantly associated with crime, but moderated the associations of on-sale density with total crime and Part 1 crimes such that reductions in crime during SIP were observed in higher density areas. The association of off-sale outlets with crime was not moderated by SIP policies. On-sale outlet density, but not off-sale density, appears to be associated with increased crime. The results further indicate that restrictions in hours and service imposed by SIP policies reduced crime in high on-sale outlet density areas. These findings reinforce the importance of regulating alcohol outlet density and hours of service, especially for on-sale outlets, as a crime reduction strategy.

Spatial analysis of HIV detection rates among Brazilian young men, 2007–2021

ABSTRACT The main goal of this study was to spatially analyze the HIV epidemic scenario in young men in Brazil, 2007–2021. We used secondary data obtained from the Brazilian Information System for Notifiable Diseases. Individuals aged 15–29 years with permanent residence in Brazil who were diagnosed with HIV during the study period were included in the analysis. Municipality HIV age-adjusted detection rates were analyzed through spatial distribution, autocorrelation, and spatiotemporal risk analyses. During the study period, 108,392 HIV cases were reported in young Brazilian men. The HIV epidemic increased territorially in the northern, northeastern, midwestern, and southeastern regions but decreased in the southern region. Although the number of clusters comprising municipalities with high HIV detection rates (hotspots) decreased, new ones appeared, expanded, or stopped changing size. Hotspots and spatio-temporal risk zones (spatial areas with increased HIV detection in a specific period) comprised economically developed municipalities with high demographic density surrounded by less developed municipalities. The period of the spatiotemporal risk zones was between 2008 and 2021. Our study showed that HIV detection rates continue to increase among young Brazilian men, and health authorities should reinforce efforts mainly in capitals and surrounded municipalities in the north, northeast, southeast, and midwest regions.

Association of Anatomical Location of Neuroarthropathic (Charcot's) Destruction with Age-and Sex-Matched Bone Mineral Density Reduction.

It is well documented that diabetes has a systemic impact on bone mineral density. Recent literature has evaluated the relationship between the development of Charcot neuroarthropathy and reduced local bone mineral density; however, it is not clear if there is an association between osteoporosis/osteopenia and Charcot onset, or, even further, location of neuroarthropathic breakdown. We retrospectively identified and assessed 39 patients with 41 feet (4 bilateral) with a history of Charcot breakdown who underwent a bone mineral density scan over a 15-year period. Demographic, radiographic, and bone mineral density information was analyzed. The average patient age at the time of bone mineral density scan was 53.44 ± 8.09 years, and 52.77 ± 8.19 years at the time of Charcot diagnosis. Four feet were considered Sanders-Frykberg I (9.3%), 17 were Sanders-Frykberg II (39.5%), ten were Sanders-Frykberg III (23.3%), and 12 were Sanders-Frkyberg IV/V (27.9%). Neuroarthropathic breakdown of the rearfoot region (Sanders-Frykberg IV/V) was found to be associated and preceded by osteoporosis and osteopenia at the hip as demonstrated by a lower Z-score (P = 0.05). Charcot neuroarthropathy was not associated with poor bone health or loss of bone mineral density at the femoral neck, forearm, or lumbar spine. We believe that the present findings suggest a possible relationship between osteoporosis/osteopenia and the location of CN development. With these findings in mind, we conclude that patients with diabetic skeletal fragility may benefit from treatment of underlying poor bone mineral density to prevent the onset of Charcot neuroarthropathy.

Patterns of infectious disease in ancient Brazilian groups: The role of different environments and demographic parameters

In the last 200ka, humans have explored and adapted to a changing world. Environmental challenges faced by humans today, like emergent pathogens and overpopulation, are not that different from the ones in the past. This article aims to discuss the patterns of disease observed in ancient human populations from southeastern and southern Brazil (hunter-gatherer groups associated to riverine and coastal shellmounds and agriculturalists associated to the Tupiguarani archaeological Tradition). The role of new pathogens and high demographic density will be discussed, as well as the interpretations regarding the frequencies of chronic infectious diseases that affect bones. We will also present the importance of understanding patterns of health and disease in past human populations in order to address present day scenarios related to climate change, vulnerable populations, and disease. Warning: This article discusses and presents images of ancient human remains. While we acknowledge that this can be a sensitive topic, we would like to stress the importance of studying and generating knowledge about past human populations which otherwise would be completely unknown and forgotten.