Contact Information

Contact Information

PhD Candidate, Demographer, Sociologist.

Publications

Peer-Reviewed

Trends in Dementia Prevalence Across Latin America and the Caribbean

JAMA Neurology, 2026

Two decades of change in dementia prevalence across five 10/66 Dementia Research Group sites in Latin America and the Caribbean. Pooled crude prevalence rose from 10.6% to 16.9%; after age and sex standardization, prevalence held steady in Cuba and the Dominican Republic but rose substantially in Mexico, Peru, and Puerto Rico — contrasting with the declining trends reported in high-income countries.

Recommended citation: Llibre-Guerra JJ, Wu YT, Acosta I, Soria C, Sosa AL, Acosta D, Jiménez-Velázquez IZ, Guerra M, Salas A, Lu R, Llibre-Rodriguez JJ, Prina M. Trends in Dementia Prevalence Across Latin America and the Caribbean. JAMA Neurology. Published online July 13, 2026. doi:10.1001/jamaneurol.2026.2305 https://doi.org/10.1001/jamaneurol.2026.2305

Full entry →

Why Would Others Help Me?: How People Explain Why They Can (or Cannot) Rely on Family and Friends

Social Psychology Quarterly, 2026

A study of how people explain why they can—or cannot—rely on family and friends for support, drawing on open-ended responses from the UC Berkeley Social Networks Study (UCNets).

Recommended citation: Fischer CS, Soria C. Why Would Others Help Me?: How People Explain Why They Can (or Cannot) Rely on Family and Friends. Social Psychology Quarterly. 2026.

Full entry →

Prevalence of Dementia and Modifiable Risk Factors among Older Adults in Cuba: A Population-Based Study

Neuroepidemiology, 2026

A population-based study estimating the prevalence of dementia and associated modifiable risk factors among older adults in Cuba, using the CADAS protocol and the 10/66 diagnostic algorithm across 13 urban and rural catchment areas in western Cuba.

Recommended citation: Llibre-Rodriguez JJ, Zayas T, Llibre-Guerra JJ, Diaz N, Martinez Z, Santos A, Liu MM, Soria C, Acosta D, Jiménez-Velázquez IZ, Dow WH. Prevalence of Dementia and Modifiable Risk Factors among Older Adults in Cuba: A Population-Based Study. Neuroepidemiology. Published online July 7, 2026. doi:10.1159/000553277 https://doi.org/10.1159/000553277

Full entry →

CatLLM: A Python package for Generating, Assigning, and Scoring Open-Ended Survey Data and Images

Journal of Open Source Software, 2026

Peer-reviewed software paper introducing CatLLM, an open-source Python and R toolkit for reproducible LLM-powered text classification, with defaults calibrated against expert human coders across multiple survey datasets.

Recommended citation: Soria C. CatLLM: A Python package for Generating, Assigning, and Scoring Open-Ended Survey Data and Images. Journal of Open Source Software. 2026. doi:10.21105/joss.09678 https://doi.org/10.21105/joss.09678

Full entry →

The Caribbean American Dementia and Aging Study: Protocol for a Population-Based Study of Older Adult Health and Dementia in Cuba, the Dominican Republic, and Puerto Rico

BMC Geriatrics, 2025

CADAS is a multi-purpose household study of aging focused on the life course determinants and consequences of health and dementia in Puerto Rico, Dominican Republic, and Cuba.

Recommended citation: Liu MM, Llibre-Guerra J, Soria C, Li J, Zayas Llerena T, Rodriguez G, Acosta D, Jiménez Velázquez I, Llibre-Rodriguez JJ, Dow WH. The Caribbean American Dementia and Aging Study: protocol for a population-based study of older adult health and dementia in Cuba, the Dominican Republic, and Puerto Rico. BMC Geriatr. 2025;25(1). doi:10.1186/s12877-025-06131-0 https://bmcgeriatr.biomedcentral.com/articles/10.1186/s12877-025-06131-0

Full entry →

Assessing the 10/66 Dementia Classification Algorithm for International Comparative Analyses with the U.S.

American Journal of Epidemiology, 2025

Cross-national comparisons of dementia prevalence are essential for identifying unique determinants and cultural-specific risk factors, but methodological differences in dementia classification across countries hinder global comparisons. This study maps the 10/66 algorithm for dementia classification, widely used and validated in low- and middle-income countries (LMICs), to the U.S. Aging, Demographics, and Memory Study (ADAMS), the dementia sub-study of the Health and Retirement Study, and assesses its performance in ADAMS.

Recommended citation: Jorge J Llibre Guerra, Jordan Weiss, Jing Li, Chris Soria, Ana Rodriguez-Salgado, Juan de Jesús Llibre Rodriguez, Ivonne Z Jiménez Velázquez, Daisy Acosta, Mao-Mei Liu, William H Dow, Assessing the 10/66 Dementia Classification Algorithm for International Comparative Analyses with the U.S., American Journal of Epidemiology, 2024;, kwae470, https://doi.org/10.1093/aje/kwae470 https://pubmed.ncbi.nlm.nih.gov/39745806/

Full entry →

Commentary: Examining Contextual Factors Contributing to Differentials in COVID-19 Mortality in U.S. vs. India

Frontiers in Public Health, 2022

This commentary examines the disparities in COVID-19 mortality rates between the U.S. and India, exploring demographic dynamics and contextual factors contributing to the “Indian death paradox.”

Recommended citation: Zanwar PP, Wallace KL, Soria C, Perianayagam A. Commentary: Examining contextual factors contributing to differentials in COVID-19 mortality in U.S. vs. India. Front Public Health. 2022;10:995751. doi:10.3389/fpubh.2022.995751 https://www.frontiersin.org/journals/public-health/articles/10.3389/fpubh.2022.995751/full

Full entry →

Connecting Fathers: Fathers’ Impact on Adult Children’s Social Networks

The International Journal of Aging and Human Development, 2022

This study examines how having an emotionally close and active father in an adult child’s social network shapes network composition, using data from the 2015 UC Berkeley Social Networks Study (UCNets).

Recommended citation: Soria C, Lawton L. Connecting Fathers: Fathers Impact on Adult Childrens Social Networks. The International Journal of Aging and Human Development. 2023;96(1):19-32. doi:10.1177/00914150221106645 https://journals.sagepub.com/doi/full/10.1177/00914150221106645

Full entry →

Pre-Print

What Does Frontier Access Buy? Benchmarking LLM Access Tiers and the Reproducibility Case for Open Weights in Survey Coding

SocArXiv, 2026

Eighteen LLMs across four access tiers — proprietary flagships to laptop-scale open weights — benchmarked against human consensus on five survey-coding tasks. The flagship tier’s margin over cheaper commercial models is statistically indistinguishable from zero despite 1.3–6× higher per-token prices, and the largest open-weight models match both proprietary tiers on cell-level agreement.

Recommended citation: Soria C. What Does Frontier Access Buy? Benchmarking LLM Access Tiers and the Reproducibility Case for Open Weights in Survey Coding. SocArXiv. 2026. https://osf.io/preprints/socarxiv/5g34x_v1 https://osf.io/preprints/socarxiv/5g34x_v1

Full entry →

Model Diversity Over Model Size: Unanimous LLM Ensembles Correct Over-Classification in Survey Coding

SocArXiv, 2026

Across 16 LLMs and four open-ended survey questions, unanimous voting across diverse models corrects over-classification on subjectively ambiguous categories, with cross-provider diversity—not temperature or within-family size—as the active ingredient. As few as three diverse lower-tier models can reliably exceed GPT-5.

Recommended citation: Soria C. Model Diversity Over Model Size: Unanimous LLM Ensembles Correct Over-Classification in Survey Coding. SocArXiv. 2026. https://osf.io/preprints/socarxiv/er6mz_v1 https://osf.io/preprints/socarxiv/er6mz_v1

Full entry →

High Agreement, Different Stories: How LLM Classifiers Reshape Demographic Patterns in Survey Data

SocArXiv, 2026

A multilabel evaluation of eight LLMs against human coders on 3,200 open-ended responses from the UC Berkeley Social Networks Study, showing how high per-category agreement can mask thematic over-classification and demographic divergence.

Recommended citation: Soria C. High Agreement, Different Stories: How LLM Classifiers Reshape Demographic Patterns in Survey Data. SocArXiv. 2026. https://osf.io/preprints/socarxiv/85kyd_v1 https://osf.io/preprints/socarxiv/85kyd_v1

Full entry →

Scaling Open-Ended Survey Coding: An LLM Pipeline Where Definitions Do the Heavy Lifting

SocArXiv, 2026

CatLLM is an open-source Python and R package offering a three-stage pipeline for coding open-ended survey responses with large language models, with defaults calibrated by a systematic empirical study evaluating 21 LLMs across three capability tiers, six providers, and four survey questions.

Recommended citation: Soria C. Scaling Open-Ended Survey Coding: An LLM Pipeline Where Definitions Do the Heavy Lifting. SocArXiv. 2026. https://osf.io/preprints/socarxiv/gjvcf_v1 https://osf.io/preprints/socarxiv/gjvcf_v1

Full entry →

Partisan differences in health behaviors can impact respiratory disease dynamics

medRxiv, 2026

This study examines how partisan differences in contact rates, mask usage, and vaccination patterns shape respiratory disease transmission dynamics.

Recommended citation: Soria C, Dorelien A, Feehan D, Mahmud A. Partisan differences in health behaviors can impact respiratory disease dynamics. medRxiv. 2026. doi:10.64898/2026.01.14.26344076 https://www.medrxiv.org/content/10.64898/2026.01.14.26344076v1

Full entry →

Social Network Structure Rivals Smoking and Income as a Predictor of U.S. County Mortality

SocArXiv, 2025

This study examines how US county-level social network structure relates to mortality disparities using measures from 21 billion Facebook friendships.

Recommended citation: Soria C, Feehan DM. Social Network Structure Rivals Smoking and Income as a Predictor of U.S. County Mortality. SocArXiv. 2025. https://osf.io/preprints/socarxiv/kvmx6_v3 https://osf.io/preprints/socarxiv/kvmx6_v3

Full entry →