M. A. O'Brien

2.9k total citations · 1 hit paper
14 papers, 2.2k citations indexed

About

M. A. O'Brien is a scholar working on Surgery, General Health Professions and Pediatrics, Perinatology and Child Health. According to data from OpenAlex, M. A. O'Brien has authored 14 papers receiving a total of 2.2k indexed citations (citations by other indexed papers that have themselves been cited), including 4 papers in Surgery, 4 papers in General Health Professions and 3 papers in Pediatrics, Perinatology and Child Health. Recurrent topics in M. A. O'Brien's work include Romani and Gypsy Studies (2 papers), Prenatal Screening and Diagnostics (2 papers) and Dialysis and Renal Disease Management (2 papers). M. A. O'Brien is often cited by papers focused on Romani and Gypsy Studies (2 papers), Prenatal Screening and Diagnostics (2 papers) and Dialysis and Renal Disease Management (2 papers). M. A. O'Brien collaborates with scholars based in Ireland, United States and Canada. M. A. O'Brien's co-authors include Nick Freemantle, F M Wolf, Anne Taylor‐Vaisey, Paul E. Mazmanian, David Davis, Andrew D Oxman, Gro Jamtvedt, Jane Young, Doris Tove Kristoffersen and David W. Dowdy and has published in prestigious journals such as JAMA, Journal of Hepatology and BMJ Open.

In The Last Decade

M. A. O'Brien

12 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.

Impact of Formal Continuing Medical Education

1999 1.8k citations David Davis, M. A. O'Brien et al. JAMA profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
M. A. O'Brien Ireland	6	1.0k	1.0k	233	215	165	14	2.2k
F M Wolf United States	9	985 1.0×	1.1k 1.1×	144 0.6×	256 1.2×	127 0.8×	26	2.1k
D A Davis Canada	7	1.4k 1.4×	1.1k 1.1×	231 1.0×	178 0.8×	340 2.1×	9	2.6k
Gregory C. Kane United States	23	711 0.7×	911 0.9×	186 0.8×	327 1.5×	104 0.6×	80	2.2k
Jan D. Carline United States	29	1.1k 1.1×	2.0k 1.9×	152 0.7×	399 1.9×	104 0.6×	75	3.0k
Dave A. Davis United States	5	1.5k 1.4×	1.1k 1.1×	228 1.0×	113 0.5×	431 2.6×	6	2.8k
Henk Mokkink Netherlands	23	1.3k 1.3×	1.1k 1.0×	203 0.9×	249 1.2×	437 2.6×	68	2.3k
George E. Thibault United States	27	803 0.8×	891 0.9×	366 1.6×	212 1.0×	379 2.3×	57	2.5k
Doris Tove Kristoffersen Norway	21	1.2k 1.1×	582 0.6×	276 1.2×	106 0.5×	498 3.0×	59	2.9k
Catherine A. Marco United States	30	627 0.6×	1.1k 1.1×	220 0.9×	75 0.3×	164 1.0×	167	2.6k
Mark J. Fagan United States	25	596 0.6×	788 0.8×	121 0.5×	369 1.7×	76 0.5×	69	1.6k

Countries citing papers authored by M. A. O'Brien

Since Specialization

Citations

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

Fields of papers citing papers by M. A. O'Brien

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by M. A. O'Brien. 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 M. A. O'Brien. The network helps show where M. A. O'Brien may publish in the future.

Co-authorship network of co-authors of M. A. O'Brien

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

All Works

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14 of 14 papers shown

1.

O'Brien, M. A., et al.. (2025). Lactation anaphylaxis complicated by reversible cardiac dysfunction in a multiparous woman with previous breastfeeding experience. Obstetric Medicine. 19(1). 67–69.

2.

O'Brien, M. A., et al.. (2024). Genetic disorders in maternal medicine. Best Practice & Research Clinical Obstetrics & Gynaecology. 97. 102546–102546. 1 indexed citations

3.

O'Brien, M. A., et al.. (2024). The experiences and outcomes of Gypsy, Roma, and Traveller pregnant people in pregnancy: A scoping review. International Journal of Gynecology & Obstetrics. 167(2). 529–537.

4.

O'Brien, M. A., et al.. (2022). Experiences and outcomes of Gypsy, Roma and Traveller women in pregnancy: a scoping review protocol. BMJ Open. 12(7). e057788–e057788. 4 indexed citations

5.

Afdhal, Nezam H., R Levine, R. Brown, et al.. (2008). 3 COLCHICINE VERSUS PEG-INTERFERON ALFA 2B LONG TERM THERAPY: RESULTS OF THE 4 YEAR COPILOT TRIAL. Journal of Hepatology. 48. S4–S4. 56 indexed citations

6.

Dowdy, David W., M. A. O'Brien, & David Bishai. (2008). Cost-effectiveness of novel diagnostic tools for the diagnosis of tuberculosis.. PubMed. 12(9). 1021–9. 53 indexed citations

7.

Jamtvedt, Gro, Jane Young, Doris Tove Kristoffersen, M. A. O'Brien, & Andrew D Oxman. (2006). Does telling people what they have been doing change what they do? A systematic review of the effects of audit and feedback. BMJ Quality & Safety. 15(6). 433–436. 282 indexed citations

8.

O'Brien, M. A., et al.. (2000). The safety of intravenous iron dextran (Dexferrum) during hemodialysis in patients with end stage renal disease.. PubMed. 27(1). 41–2. 6 indexed citations

9.

Davis, David, M. A. O'Brien, Nick Freemantle, et al.. (1999). Impact of Formal Continuing Medical Education. JAMA. 282(9). 867–867. 1816 indexed citations breakdown →

10.

O'Brien, M. A. & Nancy A. Mason. (1992). Systemic absorption of intraperitoneal antimicrobials in continuous ambulatory peritoneal dialysis.. PubMed. 11(3). 246–54. 12 indexed citations

11.

Johnson, Christopher A., et al.. (1989). Intraperitoneal Vancoled does not cause chemical peritonitis.. PubMed. 5. 130–2. 1 indexed citations

12.

O'Brien, M. A.. (1971). Combined approach tympanoplasty. The Journal of Laryngology & Otology. 85(9). 883–890. 3 indexed citations

13.

O'Brien, M. A.. (1968). Current Concepts of Nasal Septal Surgery. The Journal of Laryngology & Otology. 82(11). 987–994. 1 indexed citations

14.

O'Brien, M. A.. (1963). Some Observations on the Surgery of Bilateral Abductor Laryngeal Paralysis. The Journal of Laryngology & Otology. 77(11). 952–957. 2 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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