Gerry Hagan

3.1k total citations · 2 hit papers
19 papers, 2.2k citations indexed

About

Gerry Hagan is a scholar working on Pulmonary and Respiratory Medicine, Physiology and Epidemiology. According to data from OpenAlex, Gerry Hagan has authored 19 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 18 papers in Pulmonary and Respiratory Medicine, 11 papers in Physiology and 2 papers in Epidemiology. Recurrent topics in Gerry Hagan's work include Chronic Obstructive Pulmonary Disease (COPD) Research (18 papers), Respiratory Support and Mechanisms (12 papers) and Asthma and respiratory diseases (11 papers). Gerry Hagan is often cited by papers focused on Chronic Obstructive Pulmonary Disease (COPD) Research (18 papers), Respiratory Support and Mechanisms (12 papers) and Asthma and respiratory diseases (11 papers). Gerry Hagan collaborates with scholars based in United Kingdom, Trinidad and Tobago and Japan. Gerry Hagan's co-authors include Jadwiga A. Wedzicha, Peter M.A. Calverley, Robert A. Stockley, Terence Seemungal, Zainab Ansari, Wayomi R. Perera, Tom Wilkinson, John A. Bilello, Rupert Vessey and Gavin C. Donaldson and has published in prestigious journals such as American Journal of Respiratory and Critical Care Medicine, CHEST Journal and European Respiratory Journal.

In The Last Decade

Gerry Hagan

18 papers receiving 2.1k citations

Hit Papers

align trajectories

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.

The Prevention of Chronic Obstructive Pulmonary Disease Exacerbations by Salmeterol/Fluticasone Propionate or Tiotropium Bromide

2007 601 citations Jadwiga A. Wedzicha, Peter M.A. Calverley et al. American Journal of Respiratory and Critical Care Medicine profile →
Evaluation of COPD Longitudinally to Identify Predictive Surrogate End-points (ECLIPSE)

2008 510 citations Jørgen Vestbo, W. J. Anderson et al. European Respiratory Journal profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Gerry Hagan United Kingdom	14	2.0k	1.1k	250	147	132	19	2.2k
Lisa Willits United Kingdom	11	1.9k 0.9×	1.2k 1.1×	162 0.6×	104 0.7×	92 0.7×	16	2.1k
Steven Pascoe United Kingdom	17	2.5k 1.2×	2.1k 1.8×	85 0.3×	186 1.3×	50 0.4×	49	2.7k
R. Escamilla France	18	779 0.4×	430 0.4×	222 0.9×	84 0.6×	77 0.6×	62	1.1k
Jorge Zagaceta Spain	10	1.1k 0.6×	384 0.3×	235 0.9×	44 0.3×	191 1.4×	13	1.3k
Frank Barnhart United States	7	1.2k 0.6×	900 0.8×	56 0.2×	66 0.4×	38 0.3×	15	1.3k
Germano Bettoncelli Italy	16	658 0.3×	458 0.4×	143 0.6×	36 0.2×	64 0.5×	38	916
Stanislav Šuškovič Slovenia	14	388 0.2×	340 0.3×	59 0.2×	64 0.4×	86 0.7×	25	863
Walter J. O’Donnell United States	13	441 0.2×	291 0.3×	186 0.7×	73 0.5×	115 0.9×	24	968
Wassim W. Labaki United States	18	800 0.4×	245 0.2×	57 0.2×	51 0.3×	31 0.2×	56	1.0k
Claudio Micheletto Italy	20	816 0.4×	802 0.7×	50 0.2×	89 0.6×	21 0.2×	104	1.3k

Countries citing papers authored by Gerry Hagan

Since Specialization

Citations

This map shows the geographic impact of Gerry Hagan'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 Gerry Hagan with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Gerry Hagan more than expected).

Fields of papers citing papers by Gerry Hagan

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Gerry Hagan. 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 Gerry Hagan. The network helps show where Gerry Hagan may publish in the future.

Co-authorship network of co-authors of Gerry Hagan

This figure shows the co-authorship network connecting the top 25 collaborators of Gerry Hagan. A scholar is included among the top collaborators of Gerry Hagan 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 Gerry Hagan. Gerry Hagan is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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19 of 19 papers shown

Kaise, Toshihiko, Hisamitsu Omori, Takeo Suzuki, & Gerry Hagan. (2016). Prevalence of airflow limitation in subjects undergoing comprehensive health examination in Japan: Survey of Chronic Obstructive pulmonary disease Patients Epidemiology in Japan. International Journal of COPD. 11. 873–873. 14 indexed citations

Onishi, Katsuya, et al.. (2014). Prevalence of airflow limitation in outpatients with cardiovascular diseases in Japan. International Journal of COPD. 9. 563–563. 29 indexed citations

Jones, Paul, et al.. (2014). The relationship between the COPD Assessment Test score and airflow limitation in Japan in patients aged over 40 years with a smoking history. International Journal of COPD. 9. 1357–1357. 11 indexed citations

Jones, Diana, Keisaku Fujimoto, Gerry Hagan, et al.. (2013). A study to assess COPD Symptom-based Management and to Optimise treatment Strategy in Japan (COSMOS-J) based on GOLD 2011. International Journal of COPD. 8. 453–453. 9 indexed citations

Müllerová, Hana, Gerry Hagan, Mark Woodhead, et al.. (2012). The natural history of community-acquired pneumonia in COPD patients: A population database analysis. Respiratory Medicine. 106(8). 1124–1133. 155 indexed citations

Calverley, Peter M.A., Robert A. Stockley, Terence Seemungal, et al.. (2010). Reported Pneumonia in Patients With COPD. CHEST Journal. 139(3). 505–512. 117 indexed citations

Francis, Helen, Michelle L Hazell, Dave Singh, et al.. (2009). Prevalence of airflow obstruction in patients attending a rapid access chest pain clinic. Respiratory Medicine. 103(5). 736–742.

Wedzicha, Jadwiga A., Peter M.A. Calverley, Terence Seemungal, et al.. (2008). The INSPIRE Study: Influence of Prior Use and Discontinuation of Inhaled Corticosteroids. American Journal of Respiratory and Critical Care Medicine. 178(5). 544–544. 3 indexed citations

Wedzicha, Jadwiga A., Peter M.A. Calverley, Terence Seemungal, et al.. (2008). Methodologic Shortcomings of the INSPIRE Randomized Trial. American Journal of Respiratory and Critical Care Medicine. 178(10). 1091–1092. 3 indexed citations

10.

Mannino, David M., et al.. (2008). Relationship between lung function impairment and incidence or recurrence of cardiovascular events in a middle-aged cohort. Thorax. 63(7). 599–605. 129 indexed citations

11.

Singh, Dave, Jean Brooks, Gerry Hagan, Anthony Cahn, & Brian O’Connor. (2008). Superiority of "triple" therapy with salmeterol/fluticasone propionate and tiotropium bromide versus individual components in moderate to severe COPD. Thorax. 63(7). 592–598. 137 indexed citations

12.

Vestbo, Jørgen, W. J. Anderson, Harvey O. Coxson, et al.. (2008). Evaluation of COPD Longitudinally to Identify Predictive Surrogate End-points (ECLIPSE). European Respiratory Journal. 31(4). 869–873. 510 indexed citations breakdown →

13.

Wedzicha, Jadwiga A., Peter M.A. Calverley, Terence Seemungal, et al.. (2007). The Prevention of Chronic Obstructive Pulmonary Disease Exacerbations by Salmeterol/Fluticasone Propionate or Tiotropium Bromide. American Journal of Respiratory and Critical Care Medicine. 177(1). 19–26. 601 indexed citations breakdown →

14.

Seemungal, Terence, Robert A. Stockley, Peter M.A. Calverley, Gerry Hagan, & Jadwiga A. Wedzicha. (2007). Investigating New Standards for Prophylaxis in Reduction of Exacerbations—The INSPIRE Study Methodology. COPD Journal of Chronic Obstructive Pulmonary Disease. 4(3). 177–183. 17 indexed citations

15.

Garrod, Rachel, et al.. (2007). The relationship between inflammatory markers and disability in chronic obstructive pulmonary disease (COPD). Primary Care Respiratory Journal. 16(4). 236–240. 65 indexed citations

16.

Wedzicha, Jadwiga A., Peter M.A. Calverley, Terence Seemungal, et al.. (2007). The prevention of COPD exacerbations by salmeterol/fluticasone propionate or tiotropium bromide. 15 indexed citations

17.

Hurst, John R., Gavin C. Donaldson, Wayomi R. Perera, et al.. (2006). Use of Plasma Biomarkers at Exacerbation of Chronic Obstructive Pulmonary Disease. American Journal of Respiratory and Critical Care Medicine. 174(8). 867–874. 344 indexed citations

18.

Dheda, Keertan, et al.. (2004). Implementation of British Thoracic Society guidelines for acute exacerbation of chronic obstructive pulmonary disease: impact on quality of life. Postgraduate Medical Journal. 80(941). 169–171. 28 indexed citations

19.

Burney, Peter, Samy Suissa, Joan B. Soriano, et al.. (2003). The pharmacoepidemiology of COPD: Recent advances and methodological discussion. European Respiratory Journal. 22(43 suppl). 1s–44s. 37 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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