Helgi Sigvaldason

4.3k total citations
82 papers, 3.3k citations indexed

About

Helgi Sigvaldason is a scholar working on Cardiology and Cardiovascular Medicine, Oncology and Epidemiology. According to data from OpenAlex, Helgi Sigvaldason has authored 82 papers receiving a total of 3.3k indexed citations (citations by other indexed papers that have themselves been cited), including 24 papers in Cardiology and Cardiovascular Medicine, 20 papers in Oncology and 15 papers in Epidemiology. Recurrent topics in Helgi Sigvaldason's work include BRCA gene mutations in cancer (12 papers), Global Cancer Incidence and Screening (11 papers) and Cervical Cancer and HPV Research (9 papers). Helgi Sigvaldason is often cited by papers focused on BRCA gene mutations in cancer (12 papers), Global Cancer Incidence and Screening (11 papers) and Cervical Cancer and HPV Research (9 papers). Helgi Sigvaldason collaborates with scholars based in Iceland, United States and Sweden. Helgi Sigvaldason's co-authors include Nikulás Sigfússon, Hrafn Tulinius, Laufey Tryggvadóttír, Guðmundur Þorgeirsson, Guðríður H. Ólafsdóttir, Gunnar Sigurðsson, G Thorgeirsson, Kristín Bjarnadóttir, Kristján Sigurðsson and Lilja Sigrún Jónsdóttir and has published in prestigious journals such as The Lancet, Circulation and Journal of the American College of Cardiology.

In The Last Decade

Helgi Sigvaldason

79 papers receiving 3.1k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Helgi Sigvaldason Iceland 32 695 688 599 591 428 82 3.3k
LieLing Wu United States 25 1.1k 1.6× 449 0.7× 405 0.7× 617 1.0× 272 0.6× 32 3.8k
Jon P. Fryzek United States 32 205 0.3× 722 1.0× 1.0k 1.7× 421 0.7× 324 0.8× 66 3.8k
Karen Ruth United States 33 329 0.5× 1.2k 1.8× 711 1.2× 372 0.6× 194 0.5× 129 3.3k
M. Greaves United Kingdom 39 299 0.4× 325 0.5× 824 1.4× 1.3k 2.2× 345 0.8× 117 5.4k
Maureen McMahon United States 30 224 0.3× 608 0.9× 745 1.2× 485 0.8× 430 1.0× 54 4.2k
Gunnar Sigurðsson Iceland 31 291 0.4× 299 0.4× 1.4k 2.3× 643 1.1× 370 0.9× 77 3.5k
Scott Chasan-Taber United States 19 201 0.3× 246 0.4× 1.1k 1.8× 596 1.0× 524 1.2× 25 4.3k
Brian Shine United Kingdom 33 385 0.6× 309 0.4× 927 1.5× 423 0.7× 785 1.8× 127 3.8k
Andrea Messori Italy 31 501 0.7× 747 1.1× 568 0.9× 201 0.3× 696 1.6× 242 3.8k
Tuulikki Sokka Finland 50 275 0.4× 318 0.5× 527 0.9× 578 1.0× 588 1.4× 170 8.0k

Countries citing papers authored by Helgi Sigvaldason

Since Specialization
Citations

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

Fields of papers citing papers by Helgi Sigvaldason

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Helgi Sigvaldason

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

All Works

20 of 20 papers shown
1.
Kristinsson, Karl G., Tryggvi Stefánsson, Helga Erlendsdóttir, et al.. (2008). Risk factors and outcome in ICU‐acquired infections. Acta Anaesthesiologica Scandinavica. 52(9). 1238–1245. 28 indexed citations
2.
Sigurðsson, Kristján & Helgi Sigvaldason. (2007). Is it rational to start population-based cervical cancer screening at or soon after age 20? Analysis of time trends in preinvasive and invasive diseases. European Journal of Cancer. 43(4). 769–774. 19 indexed citations
3.
Sigurðsson, Kristján, Frank J. Taddeo, Kristrún R. Benediktsdóttir, et al.. (2007). HPV genotypes in CIN 2‐3 lesions and cervical cancer: A population‐based study. International Journal of Cancer. 121(12). 2682–2687. 43 indexed citations
4.
Tryggvadóttír, Laufey, Helgi Sigvaldason, Guðríður H. Ólafsdóttir, et al.. (2006). Population-Based Study of Changing Breast Cancer Risk in Icelandic BRCA2 Mutation Carriers, 1920–2000. JNCI Journal of the National Cancer Institute. 98(2). 116–122. 82 indexed citations
5.
Sigurðsson, Kristján & Helgi Sigvaldason. (2006). Effectiveness of cervical cancer screening in Iceland, 1964–2002: a study on trends in incidence and mortality and the effect of risk factors. Acta Obstetricia Et Gynecologica Scandinavica. 85(3). 343–349. 34 indexed citations
6.
Sigurðsson, Kristján & Helgi Sigvaldason. (2006). Longitudinal trends in cervical cytological lesions and the effect of risk factors. A 30‐year overview. Acta Obstetricia Et Gynecologica Scandinavica. 85(3). 350–358. 14 indexed citations
7.
Møller, Bjørn, Harald Weedon‐Fekjær, Timo Hakulinen, et al.. (2003). Prediction of cancer incidence in the Nordic countries: empirical comparison of different approaches. Statistics in Medicine. 22(17). 2751–2766. 252 indexed citations
8.
Ögmundsdóttir, Helga M., Vilhelmína Haraldsdóttir, Gudmundur Jóhannesson, et al.. (2002). Monoclonal gammopathy in Iceland: a population‐based registry and follow‐up. British Journal of Haematology. 118(1). 166–173. 37 indexed citations
9.
Sigurðsson, Gunnar, et al.. (2001). Breytingar á tíðni kransæðasjúkdóma á Íslandi. Læknablaðið. 2 indexed citations
10.
Kojic, Erna M., T Harðarson, Nikulás Sigfússon, & Helgi Sigvaldason. (1999). The prevalence and prognosis of third‐degree atrioventricular conduction block: the Reykjavik Study. Journal of Internal Medicine. 246(1). 81–86. 21 indexed citations
11.
Harðarson, T, et al.. (1998). Samband menntunar og dánartíðni með sérstöku tilliti til kransæðasjúkdóma : hóprannsókn Hjartaverndar. Læknablaðið. 1 indexed citations
12.
Sigurðsson, Kristján, et al.. (1998). Survival and prognostic factors of endometrial cancer patients in Iceland 1964–1985: Can attendance at population-based pap-smear screening affect survival?. International Journal of Cancer. 79(2). 166–174. 8 indexed citations
13.
Sigurðsson, Gunnar, et al.. (1997). Prevalence and incidence of NIDDM in Iceland: evidence for stable incidence among males and females 1967-1991— the Reykjavik Study. Diabetic Medicine. 14(6). 491–498. 48 indexed citations
14.
Sigurðsson, Engilbert, Nikulás Sigfússon, Uggi Agnarsson, Helgi Sigvaldason, & Guðmundur Þorgeirsson. (1995). Long-Term Prognosis of Different Forms of Coronary Heart Disease: The Reykjavik Study. International Journal of Epidemiology. 24(1). 58–68. 32 indexed citations
15.
Björnsson, Sigurbjörn, et al.. (1993). Samband hjartsláttartíðni, heilsufarsþátta, reykinga og dánarmeina. Læknablaðið. 1 indexed citations
16.
Þráinsdóttir, Inga S., T Harðarson, G Thorgeirsson, Helgi Sigvaldason, & Nikulás Sigfússon. (1993). The epidemiology of right bundle branch block and its association with cardiovascular morbidity -- The Reykjavik Study. European Heart Journal. 14(12). 1590–1596. 69 indexed citations
17.
Sigurðsson, Gunnar, et al.. (1992). Predictive value of apolipoproteins in a prospective survey of coronary artery disease in men. The American Journal of Cardiology. 69(16). 1251–1254. 159 indexed citations
18.
Tulinius, Hrafn, Helgi Sigvaldason, G. Ólafsdóttir, & Laufey Tryggvadóttír. (1992). Epidemiology of breast cancer in families in Iceland.. Journal of Medical Genetics. 29(3). 158–164. 41 indexed citations
19.
Sigfússon, Nikulás, et al.. (1991). Decline in ischaemic heart disease in Iceland and change in risk factor levels.. BMJ. 302(6789). 1371–1375. 91 indexed citations
20.
Tulinius, Hrafn, et al.. (1990). Reproductive factors and breast cancer risk in Iceland. A second cohort study. International Journal of Cancer. 46(6). 972–975. 16 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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