P. C. OʼBrien

2.5k total citations · 1 hit paper
21 papers, 1.8k citations indexed

About

P. C. OʼBrien is a scholar working on Neurology, Pathology and Forensic Medicine and Psychiatry and Mental health. According to data from OpenAlex, P. C. OʼBrien has authored 21 papers receiving a total of 1.8k indexed citations (citations by other indexed papers that have themselves been cited), including 4 papers in Neurology, 3 papers in Pathology and Forensic Medicine and 3 papers in Psychiatry and Mental health. Recurrent topics in P. C. OʼBrien's work include Multiple Sclerosis Research Studies (3 papers), Liver Disease and Transplantation (2 papers) and Antioxidant Activity and Oxidative Stress (2 papers). P. C. OʼBrien is often cited by papers focused on Multiple Sclerosis Research Studies (3 papers), Liver Disease and Transplantation (2 papers) and Antioxidant Activity and Oxidative Stress (2 papers). P. C. OʼBrien collaborates with scholars based in United States, United Kingdom and New Zealand. P. C. OʼBrien's co-authors include William J. Litchy, John M. Pach, P. James B. Dyck, Jeannine L. Karnes, Ronald Klein, L. Joseph Melton, E. Kokmen, Moses Rodriguez, Glenn E. Smith and L. T. Kurland and has published in prestigious journals such as Neurology, Journal of the American Geriatrics Society and American Journal of Roentgenology.

In The Last Decade

P. C. OʼBrien

20 papers receiving 1.7k 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 prevalence by staged severity of various types of diabetic neuropathy, retinopathy, and nephropathy in a population‐based cohort

1993 1.1k citations P. James B. Dyck, Jeannine L. Karnes et al. Neurology profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
P. C. OʼBrien United States	12	748	699	388	269	185	21	1.8k
Donald Iverson United States	11	526 0.7×	489 0.7×	68 0.2×	184 0.7×	129 0.7×	17	1.3k
Alain Serrié France	13	616 0.8×	1.2k 1.8×	64 0.2×	258 1.0×	258 1.4×	66	2.5k
Caroline Schaefer United States	22	302 0.4×	526 0.8×	40 0.1×	139 0.5×	490 2.6×	41	1.8k
J. Egido Spain	23	652 0.9×	121 0.2×	237 0.6×	86 0.3×	294 1.6×	96	2.9k
Konstantinos Voumvourakis Greece	29	806 1.1×	182 0.3×	73 0.2×	259 1.0×	151 0.8×	114	2.2k
Han‐Hwa Hu Taiwan	28	1.1k 1.5×	137 0.2×	57 0.1×	106 0.4×	256 1.4×	104	2.3k
Yohei Doi Japan	23	121 0.2×	335 0.5×	312 0.8×	67 0.2×	233 1.3×	76	1.7k
Chongke Zhong China	26	298 0.4×	201 0.3×	292 0.8×	97 0.4×	132 0.7×	159	2.2k
Barbara H. Braffett United States	27	324 0.4×	458 0.7×	1.3k 3.4×	56 0.2×	188 1.0×	93	2.5k
Sebastian Koch United States	29	1.0k 1.4×	117 0.2×	95 0.2×	205 0.8×	222 1.2×	135	2.8k

Countries citing papers authored by P. C. OʼBrien

Since Specialization

Citations

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

Fields of papers citing papers by P. C. OʼBrien

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by P. C. OʼBrien. 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 P. C. OʼBrien. The network helps show where P. C. OʼBrien may publish in the future.

Co-authorship network of co-authors of P. C. OʼBrien

This figure shows the co-authorship network connecting the top 25 collaborators of P. C. OʼBrien. A scholar is included among the top collaborators of P. C. OʼBrien 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 P. C. OʼBrien. P. C. OʼBrien 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

Tirona, R., Gerard Morton, Maria Pearse, Katharina E. Sixel, & P. C. OʼBrien. (2006). 166 Interfraction motion measured using 3D ultrasound and gold seed localization. Radiotherapy and Oncology. 80. S48–S48. 2 indexed citations

Ukleja, Andrew, et al.. (2003). Serum and hepatic vitamin E assessment in cirrhotics before transplantation. Journal of Parenteral and Enteral Nutrition. 27(1). 71–73. 1 indexed citations

Ukleja, Andrew, et al.. (2002). Nutritional assessment of serum and hepatic vitamin A levels in patients with cirrhosis. Journal of Parenteral and Enteral Nutrition. 26(3). 184–188. 38 indexed citations

Smith, Glenn E., E. Kokmen, & P. C. OʼBrien. (2000). Risk Factors for Nursing Home Placement in a Population‐Based Dementia Cohort. Journal of the American Geriatrics Society. 48(5). 519–525. 139 indexed citations

Velosa, Jorge A., et al.. (2000). Patterns Of Quantitative Sensation Testing Of Hypoesthesia And Hyperalgesia Are Predictive Of Diabetic Polyneuropathy—a Study Of Three Cohorts. Journal of the Peripheral Nervous System. 5(2). 120–121. 11 indexed citations

Waring, Stephen C., Walter A. Rocca, Ronald C. Petersen, et al.. (1999). Postmenopausal estrogen replacement therapy and risk of AD. 52(5). 20 indexed citations

Stolp‐Smith, Kathryn A., Elizabeth J. Atkinson, Mary E. Campion, P. C. OʼBrien, & Moses Rodriguez. (1998). Health care utilization in multiple sclerosis. Neurology. 50(6). 1594–1600. 48 indexed citations

Rodriguez, Moses, Aksel Sıva, Shelley A. Cross, P. C. OʼBrien, & L. T. Kurland. (1995). Optic neuritis. Neurology. 45(2). 244–250. 202 indexed citations

Jack, Clifford R., Brian P. Mullan, Frank W. Sharbrough, et al.. (1994). Intractable nonlesional epilepsy of temporal lobe origin. Neurology. 44(5). 829–829. 52 indexed citations

10.

Kokmen, E., et al.. (1994). Incidence and Prevalence of Huntington's Disease in Olmsted County, Minnesota (1950 Through 1989). Archives of Neurology. 51(7). 696–698. 31 indexed citations

11.

Ballard, David, et al.. (1994). Referral selection bias in the Medicare hospital mortality prediction model: are centers of referral for Medicare beneficiaries necessarily centers of excellence?. PubMed. 28(6). 771–84. 46 indexed citations

12.

Sıva, Aksel, K. Radhakrishnan, L. T. Kurland, et al.. (1993). Trauma and multiple sclerosis. Neurology. 43(10). 1878–1878. 28 indexed citations

13.

Dyck, P. James B., Jeannine L. Karnes, William J. Litchy, et al.. (1993). The prevalence by staged severity of various types of diabetic neuropathy, retinopathy, and nephropathy in a population‐based cohort. Neurology. 43(4). 817–817. 1076 indexed citations breakdown →

14.

OʼBrien, P. C., et al.. (1991). The prevalence of hearing impairment amongst Maori schoolchildren. Clinical Otolaryngology. 16(2). 174–178. 9 indexed citations

15.

Schwartz, M. William, et al.. (1991). Current Status of Radiosurgery for Arteriovenous Malformations. Canadian Journal of Neurological Sciences / Journal Canadien des Sciences Neurologiques. 18(4). 499–502. 7 indexed citations

16.

Lavine, Lawrence, John C. Steele, N. Wolfe, et al.. (1991). Amyotrophic lateral sclerosis/parkinsonism-dementia complex in southern Guam: is it disappearing?. PubMed. 56. 271–85. 18 indexed citations

17.

Armon, Carmel, et al.. (1991). When is an apparent excess of neurologic cases epidemiologically significant?. Neurology. 41(11). 1713–1713. 22 indexed citations

18.

OʼBrien, P. C., et al.. (1989). Otitis media and hearing loss in the children of the Ruatoki valley: a continuing public health problem.. PubMed. 102(865). 160–1. 9 indexed citations

19.

Williamson, B, et al.. (1984). Changing patterns in the evaluation of renal masses: economic implications. American Journal of Roentgenology. 143(2). 285–289. 5 indexed citations

20.

OʼBrien, P. C., et al.. (1977). A statistical description of the normal computerized brain scan. American Journal of Roentgenology. 129(3). 457–462. 1 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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