Gayan Perera

5.4k total citations · 2 hit papers
82 papers, 2.6k citations indexed

About

Gayan Perera is a scholar working on Psychiatry and Mental health, Geriatrics and Gerontology and Epidemiology. According to data from OpenAlex, Gayan Perera has authored 82 papers receiving a total of 2.6k indexed citations (citations by other indexed papers that have themselves been cited), including 49 papers in Psychiatry and Mental health, 17 papers in Geriatrics and Gerontology and 17 papers in Epidemiology. Recurrent topics in Gayan Perera's work include Dementia and Cognitive Impairment Research (38 papers), Chronic Disease Management Strategies (13 papers) and Schizophrenia research and treatment (13 papers). Gayan Perera is often cited by papers focused on Dementia and Cognitive Impairment Research (38 papers), Chronic Disease Management Strategies (13 papers) and Schizophrenia research and treatment (13 papers). Gayan Perera collaborates with scholars based in United Kingdom, Greece and Norway. Gayan Perera's co-authors include Robert Stewart, Matthew Hotopf, Richard D. Hayes, Chin‐Kuo Chang, Christoph Mueller, Andrea Fernandes, Matthew Broadbent, William Lee, Felicity Callard and Hitesh Shetty and has published in prestigious journals such as SHILAP Revista de lepidopterología, PLoS ONE and Scientific Reports.

In The Last Decade

Gayan Perera

75 papers receiving 2.5k citations

Hit Papers

align trajectories sort by overperformance

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Life Expectancy at Birth for People with Serious Mental Illness and Other Major Disorders from a Secondary Mental Health Care Case Register in London

2011 498 citations Gayan Perera, Robert Stewart et al. profile →
Cohort profile of the South London and Maudsley NHS Foundation Trust Biomedical Research Centre (SLaM BRC) Case Register: current status and recent enhancement of an Electronic Mental Health Record-derived data resource

2016 368 citations Gayan Perera, Megan Pritchard et al. BMJ Open profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Gayan Perera United Kingdom	24	1.3k	509	401	398	316	82	2.6k
Christian Brettschneider Germany	31	907 0.7×	836 1.6×	353 0.9×	445 1.1×	309 1.0×	142	3.0k
Chin‐Kuo Chang United Kingdom	30	1.4k 1.1×	544 1.1×	512 1.3×	763 1.9×	536 1.7×	100	3.6k
Raymond F. Palmer United States	34	1.2k 0.9×	827 1.6×	421 1.0×	402 1.0×	136 0.4×	136	3.8k
Frans Boch Waldorff Denmark	26	907 0.7×	800 1.6×	400 1.0×	237 0.6×	118 0.4×	155	2.4k
Nitin Purandare United Kingdom	24	948 0.8×	674 1.3×	226 0.6×	360 0.9×	199 0.6×	59	2.4k
Christoph Mueller United Kingdom	35	971 0.8×	306 0.6×	336 0.8×	338 0.8×	132 0.4×	147	3.6k
Taeho Greg Rhee United States	30	683 0.5×	474 0.9×	333 0.8×	731 1.8×	297 0.9×	198	2.8k
Jochen Werle Germany	32	1.3k 1.0×	865 1.7×	315 0.8×	239 0.6×	185 0.6×	95	3.1k
Sarah Cullum New Zealand	20	1.4k 1.1×	446 0.9×	209 0.5×	211 0.5×	119 0.4×	84	2.7k
Aquiles Salas Venezuela	28	1.3k 1.1×	773 1.5×	377 0.9×	240 0.6×	197 0.6×	51	3.1k

Countries citing papers authored by Gayan Perera

Since Specialization

Citations

This map shows the geographic impact of Gayan Perera's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Gayan Perera with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Gayan Perera more than expected).

Fields of papers citing papers by Gayan Perera

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Gayan Perera. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Gayan Perera. The network helps show where Gayan Perera may publish in the future.

Co-authorship network of co-authors of Gayan Perera

This figure shows the co-authorship network connecting the top 25 collaborators of Gayan Perera. A scholar is included among the top collaborators of Gayan Perera based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Gayan Perera. Gayan Perera is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

Perera, Gayan, et al.. (2025). Sleep disturbance and adverse outcomes in dementia: A retrospective cohort study using electronic health records data. International Psychogeriatrics. 100136–100136.

Perera, Gayan, Karen Glaser, Giorgio Di Gessa, & Robert Stewart. (2024). Paid Employment and Mental Health in 65–74‐Year‐Olds: Analysis of National Data From 2000, 2007 and 2014. International Journal of Geriatric Psychiatry. 39(10). e6143–e6143. 1 indexed citations

Yung, Paul, et al.. (2024). An investigation of neuropsychiatric symptoms, contextual factors, and antidepressant treatment as risk factors for dementia development in people with mild cognitive impairment. International Journal of Geriatric Psychiatry. 39(5). e6097–e6097. 5 indexed citations

Gibson, Lucy L., Daniel Weintraub, Gayan Perera, et al.. (2024). Risk of Dementia in Parkinson's Disease: A Systematic Review and Meta‐Analysis. Movement Disorders. 39(10). 1697–1709. 19 indexed citations

Mavrodaris, Angelique, Angelique Mavrodaris, Christoph Mueller, et al.. (2023). The rise of a new syndemic: characterising the interactions between dementia, infections and socioeconomics. Population Medicine. 5(Supplement).

Perera, Gayan, et al.. (2022). Unsupervised Machine Learning to Identify Depressive Subtypes. Healthcare Informatics Research. 28(3). 256–266. 11 indexed citations

Friedrich, Michaela‐Elena, et al.. (2022). Predictors of hospital readmission for patients diagnosed with delirium: An electronic health record data analysis. Acta Psychiatrica Scandinavica. 147(5). 506–515. 6 indexed citations

Gungabissoon, Usha, Gayan Perera, N. W. Galwey, & Robert Stewart. (2022). Potentially avoidable causes of hospitalisation in people with dementia: contemporaneous associations by stage of dementia in a South London clinical cohort. BMJ Open. 12(4). e055447–e055447. 6 indexed citations

Weerakkody, Ruwan, et al.. (2022). Cardiac surgery receipt and outcomes for people using secondary mental healthcare services: Retrospective cohort study using a large mental healthcare database in South London. European Psychiatry. 65(1). e67–e67. 2 indexed citations

10.

Ma, Ruimin, Gayan Perera, Eugenia Romano, et al.. (2022). Predictors of falls and fractures leading to hospitalisation in 36 101 people with affective disorders: a large representative cohort study. BMJ Open. 12(3). e055070–e055070. 4 indexed citations

11.

Perera, Gayan, et al.. (2021). Identifying subtypes of depression in clinician-annotated text: a retrospective cohort study. Scientific Reports. 11(1). 22426–22426. 7 indexed citations

12.

Ma, Ruimin, et al.. (2021). Associations between loneliness and acute hospitalisation outcomes among patients receiving mental healthcare in South London: a retrospective cohort study. Social Psychiatry and Psychiatric Epidemiology. 57(2). 397–410. 11 indexed citations

13.

Perera, Gayan, Peter R. Rijnbeek, M Alexander, et al.. (2020). Vascular and metabolic risk factor differences prior to dementia diagnosis: a multidatabase case–control study using European electronic health records. BMJ Open. 10(11). e038753–e038753. 11 indexed citations

14.

Perera, Gayan, Christoph Mueller, & Robert Stewart. (2020). Factors associated with slow progression of cognitive impairment following first dementia diagnosis. International Journal of Geriatric Psychiatry. 36(2). 271–285. 6 indexed citations

15.

Bishara, Delia, Gayan Perera, Daniel Harwood, et al.. (2020). The anticholinergic effect on cognition (AEC) scale—Associations with mortality, hospitalisation and cognitive decline following dementia diagnosis. International Journal of Geriatric Psychiatry. 35(9). 1069–1077. 20 indexed citations

16.

Tsamakis, Konstantinos, Gayan Perera, Emmanouil� Rizos, et al.. (2020). Dementia in People from Ethnic Minority Backgrounds: Disability, Functioning, and Pharmacotherapy at the Time of Diagnosis. Journal of the American Medical Directors Association. 22(2). 446–452. 18 indexed citations

17.

Peakman, Georgia, Mathieu Seynaeve, Gayan Perera, et al.. (2020). Clinical factors associated with progression to dementia in people with late-life depression: a cohort study of patients in secondary care. BMJ Open. 10(5). e035147–e035147. 10 indexed citations

18.

Fitzgerald, James, Gayan Perera, Annabel Price, et al.. (2018). The Incidence of Recorded Delirium Episodes Before and After Dementia Diagnosis: Differences Between Dementia With Lewy Bodies and Alzheimer's Disease. Journal of the American Medical Directors Association. 20(5). 604–609. 23 indexed citations

19.

Mueller, Christoph, Mariam Molokhia, Gayan Perera, et al.. (2018). Polypharmacy in people with dementia: Associations with adverse health outcomes. Experimental Gerontology. 106. 240–245. 68 indexed citations

20.

Mueller, Christoph, Robert Stewart, Nicola Veronese, et al.. (2018). Predictors of Falls and Fractures Leading to Hospitalization in People With Dementia: A Representative Cohort Study. Journal of the American Medical Directors Association. 19(7). 607–612. 49 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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