Fredrik Hjern

3.3k total citations · 2 hit papers
41 papers, 2.1k citations indexed

About

Fredrik Hjern is a scholar working on Surgery, Oncology and Emergency Medicine. According to data from OpenAlex, Fredrik Hjern has authored 41 papers receiving a total of 2.1k indexed citations (citations by other indexed papers that have themselves been cited), including 34 papers in Surgery, 18 papers in Oncology and 13 papers in Emergency Medicine. Recurrent topics in Fredrik Hjern's work include Diverticular Disease and Complications (21 papers), Colorectal Cancer Surgical Treatments (13 papers) and Appendicitis Diagnosis and Management (13 papers). Fredrik Hjern is often cited by papers focused on Diverticular Disease and Complications (21 papers), Colorectal Cancer Surgical Treatments (13 papers) and Appendicitis Diagnosis and Management (13 papers). Fredrik Hjern collaborates with scholars based in Sweden, United Kingdom and United States. Fredrik Hjern's co-authors include Alicja Wolk, Niclas Håkansson, Kenneth Smedh, Lars Påhlman, Staffan Haapaniemi, Abbas Chabok, Claes Johansson, Anders Mellgren, Anna Martling and Torbjörn Holm and has published in prestigious journals such as The Lancet Oncology, Clinical Cancer Research and The American Journal of Gastroenterology.

In The Last Decade

Fredrik Hjern

41 papers receiving 2.0k 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.

Optimal fractionation of preoperative radiotherapy and timing to surgery for rectal cancer (Stockholm III): a multicentre, randomised, non-blinded, phase 3, non-inferiority trial

2017 395 citations Torbjörn Holm, Hemming Johansson et al. profile →
Randomized clinical trial of antibiotics in acute uncomplicated diverticulitis13

2012 327 citations Lars Påhlman, Fredrik Hjern et al. British journal of surgery profile →

Peers

Fredrik Hjern

SURGE

ONCOL

PRM

CCM

F. Brétagnol France

Esther Kreisler Spain

Stein Gunnar Larsen Norway

Renato Costi Italy

Malcolm Loudon United Kingdom

Amilcare Parisi Italy

L Roncoroni Italy

John Mackay Australia

Duck-Woo Kim South Korea

Amit Merchea United States

F. Brétagnol France

Fredrik Hjern

1.5k ×0.9

SURGE

1.2k ×1.5

ONCOL

213 ×0.3

356 ×1.8

PRM

214 ×1.4

CCM

Citations per year, relative to Fredrik Hjern Fredrik Hjern (= 1×) peers F. Brétagnol

Countries citing papers authored by Fredrik Hjern

Since Specialization

Citations

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

Fields of papers citing papers by Fredrik Hjern

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Fredrik Hjern

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

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Schmidt, Peter T., et al.. (2023). Identification of diverticular disease in Swedish healthcare registers: a validation study. Scandinavian Journal of Gastroenterology. 59(2). 176–182. 1 indexed citations

Holm, T., et al.. (2021). Preoperative multidisciplinary team assessment is associated with improved survival in patients with locally advanced colon cancer; a nationwide cohort study in 3157 patients. European Journal of Surgical Oncology. 47(9). 2398–2404. 15 indexed citations

Sköldberg, Filip, Fredrik Hjern, Andrea Discacciati, et al.. (2021). Mortality in patients hospitalised for diverticulitis in Sweden—A national population‐based cohort study. 3(3). 131–140. 3 indexed citations

Blomqvist, Lennart, et al.. (2019). Morphological predictors for lymph node metastases on computed tomography in colon cancer. Abdominal Radiology. 44(5). 1712–1721. 40 indexed citations

Abraham‐Nordling, Mirna, et al.. (2018). High intake of dietary fibre from fruit and vegetables reduces the risk of hospitalisation for diverticular disease. European Journal of Nutrition. 58(6). 2393–2400. 21 indexed citations

Nordenvall, Caroline, et al.. (2018). Management and Outcome After Multivisceral Resections in Patients with Locally Advanced Primary Colon Cancer. Diseases of the Colon & Rectum. 61(4). 454–460. 17 indexed citations

Hjern, Fredrik, et al.. (2018). Robotic vs laparoscopic rectal tumour surgery: a cohort study. Colorectal Disease. 21(2). 191–199. 29 indexed citations

Palmer, G., et al.. (2017). Management and prognosis of locally recurrent rectal cancer – A national population-based study. European Journal of Surgical Oncology. 44(1). 100–107. 48 indexed citations

Hjern, Fredrik, et al.. (2016). Emergency management with resection versus proximal stoma or stent treatment and planned resection in malignant left-sided colon obstruction. World Journal of Surgical Oncology. 14(1). 232–232. 49 indexed citations

10.

Sköldberg, Filip, Tobias Svensson, Ola Olén, et al.. (2015). A population-based case–control study on statin exposure and risk of acute diverticular disease. Scandinavian Journal of Gastroenterology. 51(2). 203–210. 12 indexed citations

11.

Svensson, Tobias, Fredrik Granath, Fredrik Hjern, et al.. (2011). Diverticular disease and the risk of colon cancer - a population-based case-control study. Alimentary Pharmacology & Therapeutics. 34(6). 675–681. 71 indexed citations

12.

Hjern, Fredrik, Alicja Wolk, & Niclas Håkansson. (2011). Smoking and the risk of diverticular disease in women. British journal of surgery. 98(7). 997–1002. 96 indexed citations

13.

Hjern, Fredrik, Alicja Wolk, & Niclas Håkansson. (2011). Obesity, Physical Inactivity, and Colonic Diverticular Disease Requiring Hospitalization in Women: A Prospective Cohort Study. The American Journal of Gastroenterology. 107(2). 296–302. 91 indexed citations

14.

Picelli, Simone, Paweł Zając, Xiaolei Zhou, et al.. (2010). Common variants in human CRC genes as low-risk alleles. European Journal of Cancer. 46(6). 1041–1048. 52 indexed citations

15.

Hjern, Fredrik, Eduard Jonas, Bo Holmström, et al.. (2007). CT colonography versus colonoscopy in the follow-up of patients after diverticulitis — A prospective, comparative study. Clinical Radiology. 62(7). 645–650. 38 indexed citations

16.

Hjern, Fredrik, S. M. Goldberg, Claes Johansson, Susan C. Parker, & Anders Mellgren. (2007). Management of diverticular fistulae to the female genital tract. Colorectal Disease. 9(5). 438–442. 21 indexed citations

17.

Hjern, Fredrik, Claes Johansson, Anders Mellgren, Nancy N. Baxter, & Anders Hjern. (2006). Diverticular disease and migration – the influence of acculturation to a Western lifestyle on diverticular disease. Alimentary Pharmacology & Therapeutics. 23(6). 797–805. 72 indexed citations

18.

Hjern, Fredrik, T. Josephson, Daniel Altman, et al.. (2006). Conservative treatment of acute colonic diverticulitis: Are antibiotics always mandatory?. Scandinavian Journal of Gastroenterology. 42(1). 41–47. 101 indexed citations

19.

Altman, Daniel, Jan Zetterström, Annika López, et al.. (2005). Functional and Anatomic Outcome After Transvaginal Rectocele Repair Using Collagen Mesh: A Prospective Study. Diseases of the Colon & Rectum. 48(6). 1233–1242. 34 indexed citations

20.

Altman, Daniel, Jan Zetterström, Inkeri Schultz, et al.. (2005). Pelvic Organ Prolapse and Urinary Incontinence in Women With Surgically Managed Rectal Prolapse: A Population-Based Case-Control Study. Diseases of the Colon & Rectum. 49(1). 28–35. 41 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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