Drug dealing and drug using behaviors among people who inject drugs in Colombia: A cross-sectional study.

INTRODUCTION: People who inject drugs (PWID) are highly exposed to drug-dealing networks. In Colombia, a recent dramatic increase in drug consumption has been reported. However, involvement of PWID in drug dealing, their demographics, and drug using behaviors has not been studied. METHODS: A cross-sectional study involving 1,099 PWID recruited by Respondent Driven-Sampling in five Colombian cities was conducted in 2014. Correlates of demographic characteristics, drug dealing, and injection behaviors were examined by multivariate analysis, and a binary logistic regression model. RESULTS: Drug-dealing PWID were predominantly male (86%) with a mean age of 26 years. 56% of participants-of whom 64% had low familial socioeconomic status-had been involved in drug dealing in the previous six months. Compared to non-drug-dealing PWID, drug-dealing PWID reported higher daily injection rate (AOR: 1.3), higher odds of injection equipment confiscation by the police (AOR: 1.4), and were less likely to pay for the drugs they injected (AOR: 0.6). CONCLUSIONS: Involvement of Colombian PWID in drug dealing was higher than previously reported, and drug-dealing PWID presented sociodemographic vulnerabilities and risky injection practices. Addressing these findings may lead to effective policy design and implementation, decreased drug-dealing involvement, harm reduction, and consumption prevention.

Heroin Use and Injection Risk Behaviors in Colombia: Implications for HIV/AIDS Prevention.

BACKGROUND: Heroin production in Colombia has increased dramatically in recent decades, and some studies point to an increase in local heroin use since the mid-1990s. Despite this rapid increase, little is known about the effects of these activities on heroin injection within Colombia. One of the biggest concerns surrounding heroin injection is the potential spread of HIV through drug user networks. OBJECTIVES: This article examines injection risk behaviors among heroin injectors in the Colombian cities of Medellín and Pereira to explore the implications for possible increased HIV transmission within this group. METHODS: A cross-sectional study used respondent-driving sampling to recruit a sample of 540 people who inject drugs (PWID) over 18 years of age (Medellín: n = 242, Pereira: n = 298). Structured interviews with each participant were conducted using the World Health Organization Drug Injection Study Phase II Survey. An HIV test was also administered. RESULTS: Information regarding the socio-demographics, injection drug use, HIV risk and transmission behaviors, injection risk management, and HIV knowledge and prevalence of participants are reported. The study identified many young, newly initiated injectors who engage in risky injection practices. The study also found that HIV prevalence is fairly low among participants (2.7%). CONCLUSIONS/IMPORTANCE: Findings indicate a potential risk for the spread of HIV among PWID in Colombia given their widespread sharing practices, high rate of new injector initiation, and unsafe syringe cleaning practices. Colombia has a possibly time-limited opportunity to prevent an HIV epidemic by implementing harm reduction interventions among young, newly initiated PWID.

Hepatitis C and HIV in injecting drug users in Armenia, Colombia.

A constant and progressive increase in the availability of heroin in Colombia in recent decades and the intravenous use  of this drug have established the need to prevent a possible epidemic of HIV and hepatitis C. This research determined the sero-prevalence of hepatitis C and HIV according to sociodemographic characteristics and risk behaviors in people who inject drugs in Armenia, Colombia. This is a cross-sectional study on 265 users captured through respondent-driven sampling after informed consent. Sero-prevalence of hepatitis C was 22.3 % [95% CI 12.3 % -23.5 %]; for HIV infection, it was 2.6 % [95% CI 0.4 to 6.0]; 67.5% reported injecting for more than two years, 35 % shared needles and syringes, and 12.4 % had used a condom during their last sexual intercourse. Users who did not purchase syringes in drugstores in the last six months are 2.7 times [95% CI 1.32 to 5.48] more likely to contract hepatitis C; daily injection frequency was higher in HIV- positive cases [OR 2.87; 95% CI 0.55 to 15.9] but nonsignificant. One fourth of respondents are infected with HIV or hepatitis C, either as a single infection or co-infection. This study identified risk practices such as sharing needles and low condom use in the last six months, worldwide documented and discussed risk factors. This research is a first step in the search for strategies to prevent the spread of HIV infection and hepatitis C in networks of injecting drug users.

Un aumento constante y progresivo en la disponibilidad de heroína en Colombia en las últimas décadas, y el uso de esta droga vía intravenosa, ha establecido la necesidad de prevenir una posible epidemia de VIH y hepatitis C. Esta investigación determino la seroprevalencia de hepatitis C y VIH según características sociodemográficas y comportamientos de riesgo en población que se inyecta drogas en Armenia-Colombia. Estudio transversal en 265 usuarios captados a través de muestreo guiado por el encuestado previo consentimiento informado. La seroprevalencia de hepatitis C fue 22,3% [IC95% 12,3%-23,5%]; la infección por VIH fue 2,6% [IC95% 0,4-6,0]. El 67,5% reportó inyección por más de dos años, el 35% compartió jeringas y agujas y el 12,4% utilizó condón en su última relación sexual. Los usuarios que no adquirían jeringas en droguerías en los últimos seis meses tienen 2,7 [IC95% 1,32-5,48] veces el riesgo de hepatitis C; la frecuencia diaria de inyección fue mayor en los casos positivos con VIH [OR 2,87; IC95% 0,55-15,9] pero no significativa. La cuarta parte de los encuestados, están infectados por VIH o hepatitis C, en forma de infección única o coinfección. Este estudio identificó prácticas de riesgo, como compartir jeringas y baja utilización del condón en los últimos seis meses, factores de riesgo documentados y discutidos mundialmente. Esta investigación constituye un primer paso en la búsqueda de estrategias para prevenir la propagación de infecciones por VIH y hepatitis C en redes de usuarios de drogas inyectables.

Density of Aedes aegypti and dengue virus transmission risk in two municipalities of Northwestern Antioquia, Colombia.

The high infestation of Aedes aegypti populations in Urabá, Antioquia, Colombia represents a risk factor for increased dengue morbidity and mortality. This study aimed to determine the risk of dengue transmission by estimating the population of Ae. aegypti using entomological indices, density of females per dwelling and inhabitant, and virological surveillance in two municipalities in Colombia. A cross-sectional study was conducted with quarterly entomological surveys in three neighborhoods of Apartadó and Turbo between 2021 and 2022. Aedes indices and vector density per dwelling and per inhabitant were calculated. The Kernel method was used for spatial analysis, and correlations between climatic variables and mosquito density were examined. Virus detection and serotyping in mosquitoes was performed using single-step reverse transcription polymerase chain reaction. The housing, reservoir, and Breteau indices were 48.9%, 29.5%, and 70.2%, respectively. The mean density of Ae. aegypti was 1.47 females / dwelling and 0.51 females / inhabitant. The overall visual analysis showed several critical points in the neighborhoods studied. There was significant correlation of vector density and relative humidity and precipitation in the neighborhoods 29 de noviembre and 24 de diciembre. Additionally, serotypes DENV-1 and DENV-2 were found. The overall indices for dwellings, reservoirs, and Breteau were lower than those recorded in 2014 in Urabá. The vector density results in this study were similar to those reported in other studies conducted in Latin America, and vector infection was detected. The Aedes and density indices are complementary, emphasizing the importance of continuous surveillance of Ae. aegypti to inform appropriate control strategies and prevent future dengue outbreaks in these municipalities.

Mental health index of the elderly population in Medellín (Colombia)-2021: a factorial analysis.

Introduction: There are several risk factors associated with developing mental disorders among people over 60 years of age. Mental health encompasses multiple domains or capacities, which can comprise the psychological wellbeing of older people. Therefore, resilient coping, self-compassion, self-esteem, hopelessness, quality of life, and depression are considered the characteristics and adaptive mechanisms that bring together the main risk and protective factors for imbalance in mental wellbeing. Objective: This study aimed to establish the demographic, social, and family factors, as well as the clinical characteristics and lifestyle habits that influence the mental health of the elderly people in the city of Medellín, in the year 2021, to build a mental health index. Methodology: This study adopts a quantitative approach, employs retrospective temporality, and utilizes secondary sources. A cross-sectional survey was carried out with the SABAM Project (health and mental wellbeing of older adults from five cities in Colombia in 2021 by its Spanish acronym) database (secondary source), which is part of the research group "Public Health Observatory" of CES University (Medellín, Colombia). The database comprised 500 records of people aged over 60 years from the city of Medellín in 2021. While constructing the index, a principal component analysis was used, along with the Varimax method for factor analysis rotation. Results: The median age of the general population was 67 years (IQR 63-72); for men, the median age was 66 years (IQR 63-71) and for women, the median age was 67 years (IQR 63-72). An association was found between low socioeconomic levels, alcohol consumption, and the level of higher education (university-postgraduate) with low levels of the Mental Health Index in people over 60 years of age in Medellín during the year 2021. Conclusion: A quantitative model was developed to predict either a positive or negative prognosis in the mental wellbeing of the population over 60 years of age in the city of Medellín. The model was also used for the development of a sociodemographic profile highlighting the impact on mental health among people over 60 years of age with limited economic resources.

Clinical Manifestations of Dengue in Children and Adults in a Hyperendemic Region of Colombia.

Dengue is the most common arboviral disease in the world. Traditionally, it has affected more adults, but the incidence in children has increased in recent years. Colombia is no stranger to this change; therefore, we aimed to find the differences in signs, symptoms, and clinical, hematological, and hemogram characteristics between children under 12 years old and individuals aged 12 years and older in an endemic region of Colombia in 2020-2022. The analyses were conducted with baseline data, corresponding to a cross-sectional design. Multiple correspondence analysis was used for general, dermatological, and clinical symptom profiles. Discriminant analysis was used for laboratory profiles. Multiple correspondence analysis was applied to nominal categorical data, employing Euclidean distances to analyze age groups. Discriminant analysis was applied to a training sample and validated on a test sample. The overall agreement of the model's discrimination, sensitivity, specificity, and fit indicators was calculated. The results indicated that individuals under 12 years exhibited distinct dermatological and clinical features, including rash, pruritus, hypotension, lymphocyte count, and platelet count, compared with those aged 12 years and older. In contrast, those 12 years and older were profiled for general and clinical symptoms such as pain (back pain, retro-orbital pain, headache), dizziness, chills, hematuria, tachypnea, and elevated/high hematocrit, hemoglobin, and basophil values. These findings are crucial to understanding the high incidence in children; they also facilitate rapid understanding of the disease in clinical care settings and differentiate it from other febrile outbreaks. This will affect disease control, particularly in severe cases, and reduce mortality.

[Use of the condom and knowledge on HIV prevention among the injector's drugs in two Colombian cities]. / Uso del condón y conocimientos sobre prevención del VIH entre los inyectadores de drogas de dos ciudades colombianas.

This research focuses on the use of the condom among injector drug users and the identification of their knowledge on HIV prevention that can inform interventions. A cross- sectional study was conducted, using respondent driven sampling (RDS); the sample was composed of 540 participants, of 18 years of age or older. The survey included counseling for HIV testing and the prevention of sexually transmitted diseases. In the multivariate analysis estimated a logistic regression model (explaining how to use the condom) multinomial with raw and adjusted OR. The proportion of drug-injector users who always used condoms during sexual intercourse with their partners was 21.1%. It was found that by adjusting the risk of not using a condom by ten inadequate assumptions on HIV prevention, factors that increase the risk are sharing the injection equipment (ORaj = 3. 19 [1. 29- 7.88]), having unsafe sex practices (ORaj = 3. 74 [1. 21-11. 58]) and not increasing the use of condom despite having knowledge of HIV (ORaj = 33. 59 [9. 19-122. 86]). The low use of condoms among intravenous drug users is associated with inadequate knowledge about HIV prevention.

Pressures received and generated by a group of workers with subsistence jobs in the center of Medellín, and how these affect their life and health.

Introduction: Although studies about informal work have been carried out, there is still little evidence that explains, from the workers' perspective, what pressures they receive and generate due to the use of public space, and how these pressures affect their health. Objectives: To explore, from the point of view of a group of informal workers from the downtown Medellin, the environmental and social pressures that they receive and generate from the use of the territory, as well as the effects that these pressures may have on their life and health conditions. Methods: Ethnographic tools were used for field work and grounded theory for data analysis. Twelve informal street vendors workers were selected through theoretical sampling, with whom in-depth interviews and focus groups were conducted, after obtaining consent from the verbal and written process. Interviews and focus groups were transcribed verbatim, with the help of janitors and informants. The results were discussed and validated with the workers, and the information was triangulated with the researchers. Open and axial coding was used for data analysis. Results: The environmental and social pressures that these workers receive and generate in the streets and sidewalks of the city led them to experience critical situations in their working conditions, partly derived from the conflict that occurs over the use of the territory with the different actors in the downtown area, a situation that directly affects workers' physical and mental conditions, their life, and their work. Conclusions: The conflicts generated by the use of the territory as a workplace imply that workers have hostile relationships in their daily lives. However, these conflicts could be resolved with actions of the State and the participation of workers.

Introduction: Aunque se han realizado estudios acerca del trabajo informal, aun es escasa la evidencia que explique, desde la mirada de los trabajadores, qué presiones reciben y generan por el uso del espacio público y cómo estas presiones les afectan su salud. Objetivos: Explorar, desde la mirada de un grupo de trabajadores informales del centro de Medellin, las presiones ambientales y sociales que reciben y generan por el uso del territorio, así como los efectos que pueden tener estas presiones en sus condiciones de vida y salud. Métodos: Se utilizaron herramientas etnográficas para el trabajo de campo y de teoria fundamentada para el análisis de datos. Se tomaron mediante muestro teórico a 12 trabajadores informales "venteros", con quienes se realizaron entrevistas en profundidad y grupos focales, previa toma de consentimiento de proceso verbal y escrito. Se transcribieron las entrevistas y grupos focales de manera textual, se contó con porteros e informantes clave. Los resultados fueron discutidos y validados con los trabajadores, y se trianguló la información con los investigadores. Se utilizó codificación abierta y axial para el análisis de datos. Resultados: Las presiones ambientales y sociales que reciben y generan estos trabajadores en las calles y aceras de la ciudad los llevan a vivenciar situaciones críticas en sus condiciones laborales, derivadas, en parte, del conflicto que se da por el uso del territorio con los diferentes actores del centro de la ciudad, situación que afecta directamente las condiciones de salud física y mental de los trabajadores, su vida y su labor. Conclusiones: Los conflictos que se generan por el uso del territorio como lugar de trabajo implican que los trabajadores tengan relaciones hostiles en su cotidianidad. Sin embargo, estos conflictos podrían revertirse con acciones del Estado y la participación de los trabajadores.

Food insecurity profile according to habits and lifestyles in workers with subsistence jobs, Medellín-Colombia 2016.

Introduction: Although the informal economy absorbs a considerable portion of the population, there is still little evidence that contributes to identify the lifestyles and eating habits that outline food insecurity in workers with subsistence jobs. Objectives: To determine the profile of food insecurity according to habits and lifestyles in workers with subsistence jobs. Methods: Cross-sectional study with primary sources of information, obtained through an assisted survey, to a census of 686 workers in 2016. The results of the nutritional component of a doctoral thesis approved by the Institutional Ethics Committee of the CES University, Medellín, Colombia, are presented. Results: In this working population, 52.6% were 50 years or old; however, 86.1% reported being the main household provider, and 33.3% did not have a permit to work in public areas. Moreover, 56.8% reported being sedentary/little active, and the highest consumption of alcohol and tobacco was recorded in men, who also ate their food alone. Conversely, women considered that mood affected their appetite, and they consumed their food while serving customers and handling money. In general, less than 50.0% of workers had a set time to consume their food. Food insecurity in workers' households was explained by alcohol consumption (prevalence ratio = 1.62; confidence interval = 1.05;2.38) and having exclusive hours to consume food (prevalence ratio = 1.40; confidence interval = 1.00;1.96). Their food insecurity is defined by not consuming alcoholic beverages, considering that their mood affects their appetite, consuming one or two meals a day, without a defined schedule, not having permission to work, presenting moderate/severe food insecurity, and being a woman. Conclusions: The conditions that explain and outline food insecurity in this working population contribute to their socio-environmental and labor vulnerability, however, these conditions can be reversed.

Introducción: Aunque la economía informal ocupe una gran parte de la población, todavía existen pocas evidencias que ayuden a identificar los estilos de vida y hábitos alimentarios que definen la inseguridad alimentaria entre los trabajadores con empleos de subsistencia. Objetivos: Determinar el perfil de inseguridad alimentaria según hábitos y estilos de vida en trabajadores con empleos de subsistencia. Métodos: Estudio transversal con fuentes primarias de información, realizado a través de encuesta asistida, con un censo de 686 trabajadores en 2016. Los resultados del componente nutricional de una tesis doctoral aprobada por el Comité de Ética Institucional de la Universidad CES, en Medellín, Colombia, son presentados. Resultados: De esta población trabajadora, el 52,6% tenía más de 50 años, sin embargo, el 86,1% reportó ser la persona que más aportaba en el hogar y al 33,3% no se le permitía trabajar en los espacios públicos. El 56,8% refirió ser sedentario/poco activo, registrándose el mayor consumo de bebidas alcohólicas y cigarrillos en los hombres, quienes también comían solos. Por su parte, las mujeres consideraban que el estado de ánimo afectaba al apetito y, cuando comían, simultáneamente atendían a los clientes y manejaban dinero. En general, menos del 50,0% tenía un tiempo definido para consumir sus alimentos. Explicaron inseguridad alimentaria en sus hogares, consumo de bebidas alcohólicas (RP = 1,62. IC = 1,05;2,38) e horarios exclusivos para consumir alimentos (RP = 1,40. IC = 1,00;1,96). Perfilan su inseguridad alimentaria no consumir bebidas alcohólicas, considerar que el estado de ánimo afectaba al apetito, consumir una o dos comidas al día, sin horario definido, no tener permiso para trabajar, presentar inseguridad alimentaria moderada/grave y ser mujer. Conclusiones: Las condiciones que explican y perfilan la inseguridad alimentaria de esta población trabajadora contribuyen a configurar su vulnerabilidad socioambiental y laboral, sin embargo, pueden ser revertidas.

[Social inequalities related to road traffic mortality]. / Desigualdades sociales relacionadas con la mortalidad por accidentes de tráfico.

OBJECTIVE: To synthesize the social inequalities related to mortality from traffic accidents reported in scientific publications. METHOD: A scoping review following the PRISMA-ScR guide was carried out. Using the MesH vocabulary, we systematically searched for articles in English, Portuguese and Spanish published in the EBSCO, Scielo, Scopus, Ovid, and PubMed databases. RESULTS: We identified 47,790 records in the initial search, of which 35 articles met the selection criteria. Nine out ten publications are in high-income countries; there is a greater interest in analyzing mortality in occupants and drivers of vehicles and motorcyclists. Half of the publications use race-ethnicity and geolocation as socioeconomic position variables. The articles included in this review indicate that groups of people with low socioeconomic positions have higher mortality due to traffic accidents. CONCLUSIONS: The highest mortality from traffic accidents occurs in people with low socioeconomic positions which suggests the development of road safety actions from a comprehensive, integrative perspective and linked to other political agendas to reduce their incidence by 2030. Although road traffic fatalities are higher in low and middle-income countries, few publications are available in these countries. It is necessary to strengthen the research capacities in these countries.

Immune system gene polymorphisms associated with severe dengue in Latin America: a systematic review.

One of the main challenges in the clinical management of dengue is the early identification of cases that could progress to severe forms of the disease. A biomarker that may enable this identification is the presence of genetic polymorphisms in genes associated with immune responses. The objective of this study was to perform a systematic review of the Latin American literature on these genes. An electronic literature search was carried out in PubMed, Scopus, Lilacs, and the Virtual Health Library, and reference lists of systematic reviews in the area. Case-control studies conducted in Latin American countries examining at least one form of genetic polymorphism related to immune responses against severe dengue were included. In total, 424 articles were identified and 26 were included in this systematic review. Of the 26 selected articles, 16 reported polymorphisms associated with the risk of developing severe dengue (Risk); Similarly, 16 articles reported polymorphisms associated with a decreased risk of severe dengue (Protective). The final analysis revealed that multiple polymorphisms in immune system genes were early markers of the progression of dengue in Latin Americans and found that polymorphisms of the TNF-alpha gene may have a critical role in dengue pathogenesis.

[Validation of the abbreviated Zarit scales for measuring burden syndrome in the primary caregiver of an elderly patient]. / Validación de escalas abreviadas de zarit para la medición de síndrome del cuidador primario del adulto mayor en Medellín.

OBJECTIVE: To determine which abbreviated Zarit Scale (ZS) better evaluates the burden of the caregiver of an elderly patient in Medellin, Colombia. DESIGN: Validation study. SETTING: Primary Care setting in the city of Medellin. PARTICIPANTS: Primary caregiver of dependent elderly patients over 65 years old. PRINCIPAL MEASUREMENTS: Sensitivity, specificity, positive predictive value, and negative predictive value for the different abbreviated Zarit scales, plus performing a reliability analysis using the Cronbach Alpha coefficient. RESULTS: The abbreviated scales obtained a sensitivity of between 36.84 and 81.58%, specificity between 95.99 and 100%, positive predictive values between 71.05 and 100%, and negative predictive values of between 91.64 and 97.42%. CONCLUSIONS: The scale that better determined caregiver burden in Primary Care was the Bedard Screening scale, with a sensitivity of 81.58%, a specificity of 96.35% and positive and negative predictive values of 75.61% and 97.42%, respectively.

Working and non-working conditions related to the presence of depressive symptoms in women workers with subsistence jobs in the centre of Medellín, 2015-2019.

OBJECTIVE: To determine the working and non-working conditions related to depressive symptoms in informal workers in the centre of Medellín in 2015-2019. METHODS: Cross-sectional study with analytical intention and primary sources of information. Data collection with assisted survey in one of its union headquarters in 2016, after a pilot test and standardisation of pollsters. A total of 291 women workers were taken as a census, and their working and non-working conditions were explored. RESULTS: The women had an average age of 45 years, ≤5 years of schooling, low and middle-income housing, and income below the 2016 minimum wage. About 60% suffered moderate-severe food insecurity, and received no state benefits. They were mainly the head of the family, with 1 or 2 dependents, and were responsible for the work at home. They worked at least 8 h a day, 6 or 7 days a week, with parents or relatives selling in the street, and at least 20 years in their work. About 60% had a partner, 21.6% with family dysfunction, and 15.4% moderate-severe depressive symptoms. Living in one room or a slum, with a low socioeconomic status and moderate-severe family dysfunction were associated with, and contributed to the explanation of, moderate-severe depressive symptoms. CONCLUSIONS: The non-working conditions that are associated with and explain the moderate-severe depressive symptoms of female workers can be modified with actions that impact on the social determinants of health.

Factors associated with time to disability progression in patients with multiple sclerosis. / Factores asociados con el tiempo de progresión de la discapacidad en pacientes con esclerosis múltiple.

OBJECTIVES.: Motivation for the study: multiple sclerosis (MS) is a complex disease that requires management by different disciplines. Data on Latin American patients is scarce, therefore, the usually used theoretical references are from other population groups. Main findings: sociodemographic (male), clinical (concomitant neurological diseases) and radiological (active lesions in magnetic resonance imaging) factors were found to be associated with disease progression. Implications: taking the above into account when approaching patients in daily clinical practice, it is possible to identify when their condition has greater possibilities of progression and thus eventually prevent complications. To determine the sociodemographic, clinical and radiological factors associated with time to disability progression in patients with multiple sclerosis (MS). MATERIALS AND METHODS.: Cross-sectional descriptive study with an analytical component, based on clinical records of patients at the Neurological Institute of Colombia, between 2013 and 2021. Progression to disability in MS patients was defined as the time to an increase of at least 0.5 points in the EDSS (Expanded Disability Status Scale) score, sustained for at least six months. A Cox regression model was used to estimate the survival function and Hazard Ratios (HR) with their 95% confidence intervals (95% CI). RESULTS.: We included 216 patients, of whom 25% progressed to disability, median survival was 78 months (95% CI: 70-83), active lesions (HR = 1.94; 95% CI: 1.10-3.44), cerebellar complications (HR = 2.03; 95% CI: 0. 99-4.16), being male (HR = 2.5; 95% CI: 1.32-4.73), and having neurological diseases (HR = 2.18; 95% CI: 1.03-4.61) were associated as risk factors. While relapsing remitting MS (HR = 0.63; 95% CI: 0.31-1.26) and age at diagnosis less than 40 years (HR = 0.96; 95% CI: 0.53-1.76) were associated as protective factors. CONCLUSIONS.: Progression is affected by many factors, and there is no single independent factor.

OBJETIVOS.: Motivación para realizar el estudio: la esclerosis múltiple (EM) es una enfermedad compleja que requiere manejo por diferentes disciplinas, en la literatura científica existen pocos datos de pacientes latinoamericanos, por ende, los referentes teóricos son de otros grupos poblacionales. Principales hallazgos: se encontró que factores sociodemográficos (sexo masculino), clínicos (enfermedades neurológicas concomitantes) y radiológicos (lesiones activas captadas en resonancia magnética) se asociaron con la progresión de la enfermedad. Implicancias: teniendo en cuenta lo anterior al momento de abordar los pacientes en la práctica clínica diaria, se puede clasificar su condición con mayores posibilidades de progresión y así eventualmente prevenir complicaciones. Determinar los factores sociodemográficos, clínicos y radiológicos asociados al tiempo de progresión de discapacidad en pacientes con esclerosis múltiple (EM). MATERIALES Y MÉTODOS.: Estudio transversal analítico, basado en registros de la historia clínica de pacientes del Instituto Neurológico de Colombia, entre el 2013 y 2021. La progresión a discapacidad de los pacientes con EM se definió como el tiempo hasta un aumento de por lo menos 0,5 puntos en el valor de la EDSS (del inglés Expanded Disability Status Scale), sostenido por al menos seis meses. Se usó un modelo de regresión de Cox para estimar la función de supervivencia y los hazard ratios (HR) con sus intervalos de confianza de 95% (IC 95%). RESULTADOS.: Se incluyeron 216 pacientes, de los cuales el 25% progresó a discapacidad, la mediana de supervivencia fue de 78 meses (RIC 95%: 70−83), las lesiones activas (HR = 1,94; IC 95%: 1,10−3,44), el sexo masculino (HR = 2,5; IC 95%: 1,32−4,73), y las enfermedades neurológicas (HR = 2,18; IC95%: 1,03−4,61) se asociaron en el modelo multivariado. CONCLUSIONES.: La mediana de tiempo de progresión hacia la discapacidad fue de 72 meses. Las lesiones activas captadas en resonancia magnética y el sexo masculino se asociaron con mayor progresión de la discapacidad, con resultados estadísticamente significativos en el modelo multivariado.

Risk factors and spatial analysis for domiciliary infestation with the Chagas disease vector Triatoma venosa in Colombia.

Background: In Colombia, communities living in the Andean region are the most affected by Chagas disease due to the presence of the main vectors, the environmental and risk factors associated with house infestation. Triatoma venosa is classified as a secondary vector that is frequently found in the departments of Boyaca and Cundinamarca, but epidemiological information and its association with risk factors in domestic and peridomestic areas is unknown. The study aimed to evaluate housing and environmental characteristics associated with domestic and peridomestic infestation by T. venosa and a risk map was estimated. Methods: A cross-sectional study was conducted in municipalities of Boyaca and Cundinamarca, Colombia. From March to July 2015, triatomine infestation screening surveys were conducted in 155 households. Multivariate analysis was performed to evaluate associations with the infestation and ecological niche modeling was estimated using environmental variables. Results: No statistical association was found with any of the housing variables in the adjusted multivariate analysis. However, in raw relationship infestation was associated with bushes < 10 m (OR = 3; 95% CI: 1.3-7.3) and higher temperature p value < 0.05. The developed final risk map pointed to 12 municipalities with no previous report of the disease, which should be sampled for the presence of T. venosa. Conclusion: This study highlights the relationship between environmental factors and T. venosa in Colombia and the importance of modeling tools to improve mapping efforts. Additional studies are needed to verify the association with bushes and higher temperatures and to verify infestation in predicted risk area with no previous report of the species.

Friendly Residential Environments That Generate Autonomy in Older Persons.

OBJECTIVE: This study aimed to explore the housing and residential environment conditions associated with functional autonomy in older persons. METHODS: A quantitative cross-sectional study was conducted, including 175 individuals over the age of 60. Participants were non-institutionalized urban residents of Medellín, Colombia, selected by random two-stage sampling (neighborhoods and blocks). Analysis was done according to functional autonomy of action (dependent variable); and demographic conditions, housing, and the physical and social environment suggested by the World Health Organization (WHO) in the strategy of age-friendly cities (independent variables). Univariate, bivariate, and multivariate analyses were performed with these variables, where the odds ratio (OR), association hypothesis test, and confidence intervals were estimated, using logistic regression models. RESULTS: 89.7% of older persons had moderate physical performance. The performance of intergenerational activities (OR = 5.28) and community actions (OR = 11.28) were part of social environments. The adaptations in public transport (OR = 90.33), sanitary services (OR = 4.1), and lighting in parks (OR = 19.9) of the physical environment were the associations found with functional autonomy. CONCLUSIONS: Exploring how the physical and social environments surrounding housing are associated with the functional performance of older persons can generate useful information to support public health and city infrastructure strategies that improve their physical performance and maintain autonomy.

Working and Non-Working Conditions Related to the Presence of Depressive Symptoms in Women Workers with Subsistence Jobs in the Centre of Medellín, 2015-2019. / Condiciones laborales y extralaborales relacionadas con la presencia de síntomas depresivos en mujeres trabajadoras con empleos de subsistencia en el centro de Medellín, 2015-2019.

OBJECTIVE: To determine the working and non-working conditions related to depressive symptoms in informal workers in the centre of Medellín in 2015-2019. METHODS: Cross-sectional study with analytical intention and primary sources of information. Data collection with assisted survey in one of its union headquarters in 2016, after a pilot test and standardisation of pollsters. A total of 291 women workers were taken as a census, and their working and non-working conditions were explored. RESULTS: The women had an average age of 45 years, ≤5 years of schooling, low and middle-income housing, and income below the 2016 minimum wage. About 60% suffered moderate-severe food insecurity, and received no state benefits. They were mainly the head of the family, with 1 or 2 dependents, and were responsible for the work at home. They worked at least 8hours a day, 6 or 7 days a week, with parents or relatives selling in the street, and at least 20 years in their work. About 60% had a partner, 21.6% with family dysfunction, and 15.4% moderate-severe depressive symptoms. Living in one room or a slum, with a low socioeconomic status and moderate-severe family dysfunction were associated with, and contributed to the explanation of, moderate-severe depressive symptoms. CONCLUSIONS: The non-working conditions that are associated with and explain the moderate-severe depressive symptoms of female workers can be modified with actions that impact on the social determinants of health.

House-Level Risk Factors for Aedes aegypti Infestation in the Urban Center of Castilla la Nueva, Meta State, Colombia.

Aedes aegypti is the main vector of the dengue virus in Colombia. Some factors have been associated with its presence; however, in the local context, it has not been sufficiently evaluated. The present study seeks to identify the socioeconomic, environmental, and behavioral factors associated with the presence and abundance of A. aegypti in urban dwellings in the municipality of Castilla la Nueva. A cross-sectional cohort study was conducted in houses in the urban area of the municipality of Castilla la Nueva, where 307 houses were sampled by systematic random sampling during May 2018. A multifactorial survey was used to measure the socioeconomic, environmental, and behavioral factors as explanatory variables. The infestation and relative abundance were established by the presence of larval stages and ovitraps. The associated factors for the presence and abundance of A. aegypti were identified using negative binomial and logistic regression models. A positive housing infestation of 33.2% was identified by direct inspection and 78.5% with ovitraps. The main factors positively associated with the presence and abundance of A. aegypti were one-story homes (PR = 2.26; 95% CI: 1.31-3.87), the storage of water for domestic use (PR = 1.91; 95% CI: 1.18-3.09), and local conditions such as disorganized backyard (PR = 79.95; 95% CI: 10.96-583.24) and the proportion of shade greater than 50% of the backyard (PR = 62.32; 95% CI: 6.47-600.32). And, it is negatively associated with residential gas service (PR = 0.3; 95% CI: 0.16-0.58) and self-administered internal fumigation (PR = 0.37; 95% CI: 0.2-0.69). The presence and abundance of A. aegypti were explained by interrelated socioeconomic, environmental, and behavioral factors where local conditions and habits such as the organization of the patio, knowledge about vector biology, and cleaning containers are identified as main topics for future prevention strategies for the transmission of dengue in the local and national context.

Factors associated with the perception of HIV vulnerability among transgender women in three Colombian cities. / Factores asociados a la percepción de vulnerabilidad al VIH en mujeres transgénero de tres ciudades de Colombia.

OBJECTIVE: To describe the perception of vulnerability to HIV and its associated factors among transgender women (TW) in Bogotá, Medellín and Santiago de Cali, Colombia. MATERIALS AND METHODS: We conducted a cross-sectional study, using respondent-driven sampling (RDS) in which 620 TW participated. Sociodemographic aspects, sexual behavior, consumption of psychoactive substances and the perception of vulnerability to HIV were studied. We carried out a descriptive analysis, in which bivariate associations were evaluated using chi-square. We also conducted a multivariate analysis and built a model using Poisson regression. RESULTS: Of the participants, 63% were 35 years old or younger, had low income, started sexual relations at an early age and worked mainly as sex workers, webcam models and hairdressers; 84.7% of the participants had received money in exchange for sex at some point. The perception of vulnerability to HIV increased among those who were single, worked in prostitution, had sexually transmitted infections in the last year, avoided preventive health services and consumed cocaine during the six months before this survey. CONCLUSION: The perception of vulnerability to HIV among the TW participants in this study is high; therefore, effective interventions are required to improve the living conditions and sexual behavior of this population.

OBJETIVO: Describir la percepción de vulnerabilidad al VIH y sus factores asociados en mujeres transgénero (MT) en Bogotá, Medellín y Santiago de Cali, Colombia. MATERIALES Y MÉTODOS: Se llevó a cabo un estudio transversal, a partir de un muestreo dirigido por encuestados (RDS), en el que participaron 620 MT. Se investigaron aspectos sociodemográficos, conductas sexuales, consumo de sustancias psicoactivas y percepción de vulnerabilidad al VIH. Se realizó un análisis descriptivo, a través de asociaciones bivariadas, utilizando chi cuadrado. También se realizó el análisis multivariado y se construyó un modelo de regresión de Poisson. RESULTADOS: El 63% de las participantes son menores de 35 años, se desempeñan principalmente como trabajadoras sexuales, modelos web cam y estilistas, tienen bajos ingresos, iniciaron relaciones sexuales a temprana edad, y el 84,7% había recibido dinero a cambio de sexo alguna vez en la vida. La percepción de vulnerabilidad al VIH aumenta entre quienes ejercen la prostitución, antecedente de infecciones de transmisión sexual en el último año, son solteras, consumieron cocaína en los seis meses previos a la encuesta y evitan los servicios de prevención. CONCLUSIONES: La percepción de vulnerabilidad al VIH entre las MT participantes del estudio es alta, por lo cual se requieren intervenciones efectivas que mejoren sus condiciones de vida y comportamientos sexuales.

Sociodemographic, labor conditions, habits, lifestyles and diabetes mellitus in workers with subsistence jobs, Medellín-Colombia.

INTRODUCTION: According to American Diabetes Association, diabetes is a metabolic change characterized by the presence de hyperglycemia caused by a deficiency and/or malfunctioning of insulin secretion. OBJECTIVES: To determine sociodemographic and labor conditions, habits and lifestyles that explain diabetes in a group of informal street workers in downtown Medellín, Colombia. METHODS: This is a cross-sectional study with analytical intent based on primary sources information and on a survey with a sample of 686 workers in 2016, after obtaining informed consent. Study variables included sociodemographic and labor conditions, habits, lifestyles, and diagnosis of diabetes. Univariate, bivariate and multivariate analyses were performed. RESULTS: Workers with 50 years, 57.6% men, with a partner (56.8%), and more than 20 years in their profession. Higher prevalence of diabetes in those aged 18 to 44 and 45 to 59 years of age, lower schooling, consumed mid-morning, mid-afternoon, and evening snacks, and of households with food insecurity. Higher prevalence of diabetes was explained by: lower age, higher education, consumption of sugars, sweets, and desserts; and lower prevalence by consumption of mid-morning snacks, and household food insecurity. CONCLUSIONS: This disease of public health concern is explained by modifiable factors that can be controlled and avoided to improve the living and health conditions of this workers' population.