Publications in Psychiatry: Modern Historical Trends and Sociodemographic Drivers

Psychiatric research has grown significantly in recent years, with an increase in scientific publications worldwide. However, the factors driving these trends remain insufficiently explored. This study examines the determinants of psychiatric research output across countries, focusing on economic, demographic, and development-related variables. The analysis considers the annual number of publications, Gross Domestic Product (GDP), population size, and the Human Development Index (HDI). Data were retrieved from Web of Science and considered all publications categorized under "Psychiatry" from 2000 to 2025 (N = 1,071,338 documents). A linear mixed model was employed to investigate GDP, population density, and HDI as predictors of publications output. The findings revealed that GDP and HDI are significant positive predictors of absolute and relative publication frequency in psychiatry (ps < .001; R2 marginal absolute frequency = 50.53%, R2 marginal relative frequency = 52.32%). When analyzing data by continent, GDP emerged as a positive driver of publication frequency in Africa, Asia, Europe, Oceania, and South America (all qs < .01). Additionally, HDI emerged as a key factor, particularly in Europe and Asia (all q < .001). In contrast, population density did not show a significant association with publication output in any of the continents analyzed (qs > .05). These findings indicate that greater economic resources, education levels, health care quality, and overall living standards are related to increased research production in psychiatry. This study provides a comprehensive overview of global trends in psychiatric research and their most influential factors. The results underscore the importance of economic growth and human development in fostering scientific productivity.