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D-Index & Metrics

Social Sciences and Humanities

D-Index
61
Citations
15735
World Ranking
1345
National Ranking
257

Overview

David J. Llewellyn is affiliated with the University of Exeter in the United Kingdom and works primarily within the field of medicine. Their research focuses on various subfields including psychiatry and mental health, physiology, public health, environmental and occupational health, economics and econometrics, and artificial intelligence. The breadth of these subfields highlights an interdisciplinary approach to medical and health research.

The scientist's main areas of focus include dementia and cognitive impairment research, health systems, economic evaluations, quality of life, frailty in older adults, machine learning in healthcare, nutritional studies and diet, artificial intelligence in healthcare and education, and folate and B vitamins research.

Frequent coauthors of David J. Llewellyn include Janice M. Ranson, Ilianna Lourida, Stefano Tamburin, Michele Veldsman, and Timothy Rittman.

Llewellyn has contributed to numerous publications in several prominent scientific venues, including:

  • Alzheimer s & Dementia
  • bioRxiv (Cold Spring Harbor Laboratory)
  • Alzheimer s Research & Therapy
  • Innovation in Aging
  • JAMA Network Open

Among recent papers, some notable works are:

  • Dementia prevention in memory clinics: recommendations from the European task force for brain health services (2023, The Lancet Regional Health - Europe)
  • Insufficient Sun Exposure Has Become a Real Public Health Problem (2020, International Journal of Environmental Research and Public Health)
  • Frailty, lifestyle, genetics and dementia risk (2021, Journal of Neurology Neurosurgery & Psychiatry)
  • Mediterranean diet adherence is associated with lower dementia risk, independent of genetic predisposition: findings from the UK Biobank prospective cohort study (2023, BMC Medicine)
  • Cardiometabolic multimorbidity, genetic risk, and dementia: a prospective cohort study (2022, The Lancet Healthy Longevity)

Best Publications

  • Vitamin D effects on musculoskeletal health, immunity, autoimmunity, cardiovascular disease, cancer, fertility, pregnancy, dementia and mortality—A review of recent evidence☆

    Pawel Pludowski;Michael F. Holick;Stefan Pilz;Stefan Pilz;Carol L. Wagner

  • Association of Lifestyle and Genetic Risk With Incidence of Dementia

    Ilianna Lourida;Eilis Hannon;Thomas J Littlejohns;Kenneth M Langa

  • Vitamin D and the risk of dementia and Alzheimer disease

    Thomas J. Littlejohns;William E. Henley;Iain A. Lang;Cedric Annweiler

  • Mediterranean diet, cognitive function, and dementia: a systematic review.

    Ilianna Lourida;Maya Soni;Joanna Thompson-Coon;Nitin Purandare

  • Vitamin D and risk of cognitive decline in elderly persons

    David J. Llewellyn;Iain A. Lang;Kenneth M. Langa;Graciela Muniz-Terrera

  • Vitamin D, cognition, and dementia: a systematic review and meta-analysis.

    Cynthia Balion;Lauren E. Griffith;Lisa Strifler;Matthew Henderson

  • Frailty, Body Mass Index, and Abdominal Obesity in Older People

    Ruth E. Hubbard;Iain A. Lang;David J. Llewellyn;Kenneth Rockwood;Kenneth Rockwood

  • Vitamin E for Alzheimer's dementia and mild cognitive impairment

    Nicolas Farina;David Llewellyn;Mokhtar Gad El Kareem Nasr Isaac;Naji Tabet

  • Stroke and dementia risk: A systematic review and meta-analysis

    Elżbieta Kuźma;Ilianna Lourida;Sarah F. Moore;Deborah A. Levine

  • Low Serum Vitamin D Concentrations in Alzheimer's Disease: A Systematic Review and Meta-Analysis

    Cedric Annweiler;David J Llewellyn;Olivier Beauchet

  • Individual differences and risk taking in rock climbing

    David J. Llewellyn;Xavier Sanchez

  • The controversial role of personality traits in entrepreneurial psychology

    David J. Llewellyn;Kerry M. Wilson

  • Serum 25-Hydroxyvitamin D Concentration and Cognitive Impairment

    David J. Llewellyn;Kenneth M. Langa;Iain A. Lang

  • Cognitive performance and informant reports in the diagnosis of cognitive impairment and dementia in African Americans and whites

    Guy G. Potter;Brenda L. Plassman;James R. Burke;Mohammed U. Kabeto

  • Prevalence of neuropsychiatric symptoms and their association with functional limitations in older adults in the United States: the aging, demographics, and memory study

    Toru Okura;Brenda L. Plassman;David C. Steffens;David J. Llewellyn

  • Neighborhood Deprivation, Individual Socioeconomic Status, and Cognitive Function in Older People: Analyses from the English Longitudinal Study of Ageing

    Iain A. Lang;David J. Llewellyn;Kenneth M. Langa;Robert B. Wallace

  • Individual and Area-Based Socioeconomic Factors Associated With Dementia Incidence in England: Evidence From a 12-Year Follow-up in the English Longitudinal Study of Ageing.

    Dorina Cadar;Camille Lassale;Hilary Davies;David J. Llewellyn

  • Social isolation, cognitive reserve, and cognition in healthy older people

    Isobel E. M. Evans;David J. Llewellyn;Fiona E. Matthews;Fiona E. Matthews;Robert T. Woods

  • Depression among older adults in the United States and England

    Kara Zivin;David J. Llewellyn;Iain A. Lang;Sandeep Vijan

  • Self-efficacy, risk taking and performance in rock climbing

    David J. Llewellyn;Xavier Sanchez;Amanda Asghar;Gareth Jones

  • A Genome-Wide Association Study of Depressive Symptoms

    Karin Hek;Ayse Demirkan;Jari Lahti;Jari Lahti;Antonio Terracciano

  • Obesity, Physical Function, and Mortality in Older Adults

    Iain A. Lang;David J. Llewellyn;Kirsty Alexander;David Melzer

  • Meta-analysis of memory and executive dysfunctions in relation to vitamin D.

    Cedric Annweiler;Manuel Montero-Odasso;David J. Llewellyn;Stéphane Richard-Devantoy

Frequent Co-Authors

Andrew Steptoe
Andrew Steptoe University College London
Linda Clare
Linda Clare University of Exeter
Carol Brayne
Carol Brayne University of Cambridge
Felicia A. Huppert
Felicia A. Huppert University of Sydney
David A. Bennett
David A. Bennett Rush University Medical Center
Katri Räikkönen
Katri Räikkönen University of Helsinki
Chris Dickens
Chris Dickens University of Exeter
Joanne M. Murabito
Joanne M. Murabito Boston University
Sharon L.R. Kardia
Sharon L.R. Kardia University of Michigan–Ann Arbor
Toshiko Tanaka
Toshiko Tanaka National Institutes of Health

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