Sebastián Vollmer
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View article: Impact of POPulation Medicine Multimorbidity Intervention in Xishui County (POPMIX) on people at high risk for COPD who smoke: Protocol of the POPMIX-Smoking cluster-randomized controlled trial
Impact of POPulation Medicine Multimorbidity Intervention in Xishui County (POPMIX) on people at high risk for COPD who smoke: Protocol of the POPMIX-Smoking cluster-randomized controlled trial Open
Background Tobacco use is a major contributor to the burden of chronic obstructive pulmonary disease (COPD) and other non-communicable diseases (NCDs) in China. High-risk smokers—particularly those with pre-existing chronic conditions—ofte…
View article: Counting missing women: a reconciliation of flow and stock measures
Counting missing women: a reconciliation of flow and stock measures Open
Stock estimates of missing women suggest that excess female deaths are concentrated in South and East Asia and among young children. In contrast, flow estimates suggest that gender bias in mortality is much larger than previously estimated…
View article: Impact of POPulation Medicine Multimorbidity Intervention in Xishui County (POPMIX) on suspected asthma patients: Protocol of the POPMIX-Asthma cluster-randomized controlled trial
Impact of POPulation Medicine Multimorbidity Intervention in Xishui County (POPMIX) on suspected asthma patients: Protocol of the POPMIX-Asthma cluster-randomized controlled trial Open
Background Asthma is a common chronic disease responsible for a considerable disease burden in China and around the world. Despite its burden, there is substantial unmet need for asthma care, including screening, diagnosis, treatment, and …
View article: Effects of a large-scale participatory learning and action programme in women's groups on knowledge and behaviour related to pregnancy and childcare: a cluster-randomized controlled trial in Bihar, India
Effects of a large-scale participatory learning and action programme in women's groups on knowledge and behaviour related to pregnancy and childcare: a cluster-randomized controlled trial in Bihar, India Open
Our results do not discredit the effectiveness of PLA interventions in general. They highlight that PLA interventions delivered through existing women's self-help groups need to consider the particular challenges to participation faced by …
View article: Use of traditional medicine for hypertension, diabetes, and hypercholesterolaemia measured in 71 surveys
Use of traditional medicine for hypertension, diabetes, and hypercholesterolaemia measured in 71 surveys Open
Our study shows a high prevalence of traditional medicine use for treating hypertension, diabetes and hypercholesterolaemia in low- and middle-income countries. Our results highlight the need to better understand the clinical interactions …
View article: Benchmarking World-Model Learning
Benchmarking World-Model Learning Open
Model-learning agents should gather information to learn world models that support many downstream tasks and inferences, such as predicting unobserved states, estimating near- and far-term consequences of actions, planning action sequences…
View article: The Political Economy of Patent Buyouts
The Political Economy of Patent Buyouts Open
Incentivizing innovation through buyouts may alleviate the social costs associated with patent power, but the political economy and feasibility of this potentially important financing mechanism have been understudied. We study an internati…
View article: Temperature-driven robust disease detection in brain and gastrointestinal disorders via context-aware adaptive knowledge distillation
Temperature-driven robust disease detection in brain and gastrointestinal disorders via context-aware adaptive knowledge distillation Open
View article: Decomposing Visual Classification: Assessing Tree-Based Reasoning in VLMs
Decomposing Visual Classification: Assessing Tree-Based Reasoning in VLMs Open
Vision language models (VLMs) excel at zero-shot visual classification, but their performance on fine-grained tasks and large hierarchical label spaces is understudied. This paper investigates whether structured, tree-based reasoning can e…
View article: The Impact of a Mobile Money–Based Intervention on Maternal and Neonatal Health Outcomes in Madagascar: Cluster-Randomized Controlled Trial
The Impact of a Mobile Money–Based Intervention on Maternal and Neonatal Health Outcomes in Madagascar: Cluster-Randomized Controlled Trial Open
Background Financial barriers to accessing obstetric care persist in many low-resource settings. With increasing use of mobile phones, mobile money services appear as a promising tool to address this concern. Maternal health care is partic…
View article: Social cohesion among Syrian and Turkish children, adolescents, and young adults in Turkey: Data from Turkey
Social cohesion among Syrian and Turkish children, adolescents, and young adults in Turkey: Data from Turkey Open
This data set provides information about basic social-demographic characteristics and social cohesion among young Turkish nationals and Syrian refugees. Information on different dimensions of social cohesion such as belongingness, trust, a…
View article: National evidence on glucose-lowering medication use for diabetes from 62 low- and middle-income countries
National evidence on glucose-lowering medication use for diabetes from 62 low- and middle-income countries Open
Given rising diabetes prevalence globally, access to diabetes treatments is gaining urgency. Yet, it remains unknown which glucose-lowering medication types people with diabetes across low- and middle-income countries (LMICs) use. In this …
View article: Effects of a participatory learning and action programme in women's groups on adolescent girls: a cluster-randomized controlled trial in Bihar, India
Effects of a participatory learning and action programme in women's groups on adolescent girls: a cluster-randomized controlled trial in Bihar, India Open
Our findings suggest that Gram Varta did not change attitudes and knowledge of adolescent girls on the community-level. This could be due to low participation of girls in programme meetings as well as low levels of information shari…
View article: FOLC-Net: A Federated-Optimized Lightweight Architecture for Enhanced MRI Disease Diagnosis across Axial, Coronal, and Sagittal Views
FOLC-Net: A Federated-Optimized Lightweight Architecture for Enhanced MRI Disease Diagnosis across Axial, Coronal, and Sagittal Views Open
The framework is designed to improve performance in the analysis of combined as well as single anatomical perspectives for MRI disease diagnosis. It specifically addresses the performance degradation observed in state-of-the-art (SOTA) mod…
View article: The impact of a participatory learning and action intervention on unmet need for contraception: a cluster-randomized controlled trial in rural Bihar, India
The impact of a participatory learning and action intervention on unmet need for contraception: a cluster-randomized controlled trial in rural Bihar, India Open
Background Unmet need for contraception is a persistent issue in rural India. This work evaluates the impact of Gram Varta – a participatory learning and action intervention employed in women’s self-help groups in rural Bihar, India – on w…
View article: Unintentional Injuries Requiring Medical Attention in Low-Income and Middle-Income Countries: Evidence from Nationally Representative surveys in 12 Countries
Unintentional Injuries Requiring Medical Attention in Low-Income and Middle-Income Countries: Evidence from Nationally Representative surveys in 12 Countries Open
View article: Gap between national food production and food-based dietary guidance highlights lack of national self-sufficiency
Gap between national food production and food-based dietary guidance highlights lack of national self-sufficiency Open
In light of nationalist trends, disruptions to global food supply chains and efforts to concurrently promote sustainable diets, we assess national capacities to achieve dietary guidelines based on domestic production alone. Over a third of…
View article: Hypertension and diabetes screening uptake in adults aged 40–70 in Indonesia: a knowledge, attitudes, and practices study
Hypertension and diabetes screening uptake in adults aged 40–70 in Indonesia: a knowledge, attitudes, and practices study Open
View article: Temperature-Driven Robust Disease Detection in Brain and Gastrointestinal Disorders via Context-Aware Adaptive Knowledge Distillation
Temperature-Driven Robust Disease Detection in Brain and Gastrointestinal Disorders via Context-Aware Adaptive Knowledge Distillation Open
Medical disease prediction, particularly through imaging, remains a challenging task due to the complexity and variability of medical data, including noise, ambiguity, and differing image quality. Recent deep learning models, including Kno…
View article: Tumor cells that resist neutrophil anticancer cytotoxicity acquire a prometastatic and innate immune escape phenotype
Tumor cells that resist neutrophil anticancer cytotoxicity acquire a prometastatic and innate immune escape phenotype Open
View article: Global poverty and the cost of a healthy diet
Global poverty and the cost of a healthy diet Open
View article: Food Sourcing and Diets: Evidence from 45 Low- and Middle-Income Countries
Food Sourcing and Diets: Evidence from 45 Low- and Middle-Income Countries Open
Globally, 2.4 billion people are food insecure, and 3.1 billion lack access to nutritious diets, with no substantial improvement anticipated soon. While over 1.1 billion people engage in agriculture, recent evidence suggests that even agri…
View article: CleanSurvival: Automated data preprocessing for time-to-event models using reinforcement learning
CleanSurvival: Automated data preprocessing for time-to-event models using reinforcement learning Open
Data preprocessing is a critical yet frequently neglected aspect of machine learning, often paid little attention despite its potentially significant impact on model performance. While automated machine learning pipelines are starting to r…
View article: Real-world smartphone-based point-of-care diagnostics in primary health care to monitor HbA1c levels in people with diabetes
Real-world smartphone-based point-of-care diagnostics in primary health care to monitor HbA1c levels in people with diabetes Open
Background The lack of accurate and affordable monitoring of glycated hemoglobin (HbA1c) is a common issue among patients with diabetes in low- and middle-income countries. We aimed to test a tablet- and smartphone-based point-of-care (TSB…
View article: Measuring child food poverty: understanding the gap to achieving minimum dietary diversity
Measuring child food poverty: understanding the gap to achieving minimum dietary diversity Open
Objective: The aim of this study is to analyse complementary feeding practices, to assess the extent to which minimum dietary diversity (MDD) recommendations are being met in the population studied and to study factors that influence the a…
View article: The Breakdown of the English Society of Orders: The Role of the Industrial Revolution
The Breakdown of the English Society of Orders: The Role of the Industrial Revolution Open
View article: Addressing Physical Inactivity in Mexican Children: The Role of Parents and Their Physical Literacy
Addressing Physical Inactivity in Mexican Children: The Role of Parents and Their Physical Literacy Open
Introduction Childhood obesity and physical inactivity rates in Mexico are among the highest in the world. While parenting is a key factor in shaping children's physical activity behavior, there is a lack of research in this area, particul…
View article: Hospital construction and emergency waiting time: evidence from Nicaragua
Hospital construction and emergency waiting time: evidence from Nicaragua Open
We investigate the impact of a large new public hospital on directly observed waiting times in emergency departments of other public hospitals in Nicaragua. Using a difference-in-differences design, we estimate a significant decrease in wa…
View article: Social cohesion among Syrian and Turkish children, adolescents, and young adults in Turkey
Social cohesion among Syrian and Turkish children, adolescents, and young adults in Turkey Open
Turkey has received a large influx of Syrian refugees since the start of Syrian civil war in 2011. Integration and social cohesion have become important issues for public policy in Turkey. We study social cohesion among young Turkish natio…
View article: icon: Fast Simulation of Epidemics on Coevolving Networks
icon: Fast Simulation of Epidemics on Coevolving Networks Open
We introduce a fast simulation technique for modeling epidemics on adaptive networks. Our rejection-based algorithm efficiently simulates the co-evolution of the network structure and the epidemic dynamics. We extend the classical SIS mode…