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  • Item type:Publication,
    National-, institutional-, and individual-level determinants of psychiatric research excellence: Analysis of Stanford-Elsevier lists of the top 2 % scholars worldwide (2017–2023) Open PDF 
    (Elsevier BV, 2026-02)
    Riad, Abanoub
    ;
    Alkasaby, Muhammad
    ;
    Changchroenkul, Nisarat
    ;
    Koščík, Michal
    Background Research excellence is increasingly used as a benchmark for academic evaluation in medical sciences, including psychiatry. However, bibliometric analyses often prioritize productivity over quality. This study examined national, institutional, and individual determinants of psychiatric research excellence using a multi-level ecological framework. Methods We analyzed the Stanford–Elsevier Lists of the top 2 % scholars (2017–2023), incorporating 51 independent variables. These included: (a) national determinants grouped into five domains (mental healthcare, gender equity, socioeconomic development, budgetary policies, and disease burden), (b) institutional factors derived from global and discipline-specific rankings, and (c) individual factors of gender and academic age. The primary outcome was the number of excellent psychiatric scholars (EPS), with secondary indicators including citation counts, modified H-index, composite score, and self-citation share. Results Psychiatric research excellence was concentrated in high-income, English-speaking countries, with significant institutional elitism. A small number of institutions hosted a disproportionate share of EPS. Gender disparities persisted, with female representation negatively associated with national gender gaps in employment and education, but positively linked to government spending on education. Academic age positively correlated with citation-based performance metrics. Multivariable models confirmed the explanatory roles of gender, academic age, official language, gender equity, and human development. Conclusion Psychiatric research excellence reflects systemic advantages related to income, language, institutional prestige, and gender equity. Equitable funding, support for emerging research environments, and expanded international collaboration are essential to fostering broader participation in high-impact psychiatric research.
  • Item type:Publication,
    National-, institutional-, and individual-level determinants of dental research excellence: an analysis of Stanford–Elsevier lists of the top 2% scholars worldwide (2017–2023) Open PDF 
    (Frontiers Media SA, 2025-10-03)
    Riad, Abanoub
    Background Research excellence, distinct from productivity, is a key criterion in science policy and institutional evaluation. This study examined global distribution and determinants of dental research excellence using the Stanford–Elsevier Lists (SEL) of the top 2% most-cited scientists. Methods A bibliometric analysis was conducted using SEL datasets from 2017 to 2023. The analysis followed an ecological model consisting of three layers of independent variables: national-level indicators (macroeconomic metrics, oral disease burden, and development indices), institutional rankings, and individual-level variables (gender and academic age) were analysed. Descriptive statistics, multivariable regressions, and mixed-effects models were applied. Results The analysis demonstrated a markedly uneven global distribution of excellent dental scholars (EDS), with 96.1% and 88.9% of career-long and single-year EDS, respectively, based in high-income countries. English-speaking countries dominated, reflecting historical and linguistic biases. Institutional elitism was apparent, with 20 universities accounting for nearly one-fifth of all EDS worldwide. Gender disparities persisted, with women comprising only 14.8% (career-long) and 18.1% (single-year). Academic age consistently predicted scholarly metrics more strongly than gender. EDS numbers correlated positively with macroeconomic indicators, particularly R&D investment, while oral disease burden was negatively correlated. Conclusions Dental research excellence is disproportionately concentrated in high-income, English-speaking countries and elite institutions. Historic gender disparities remain, though narrowing trends are noticeable. The observed misalignment between oral disease burden and research excellence highlights the need for inclusive, needs-based research investment.