Ulf Hammar

4.0k total citations · 1 hit paper
67 papers, 2.3k citations indexed

About

Ulf Hammar is a scholar working on Public Health, Environmental and Occupational Health, Epidemiology and Physiology. According to data from OpenAlex, Ulf Hammar has authored 67 papers receiving a total of 2.3k indexed citations (citations by other indexed papers that have themselves been cited), including 20 papers in Public Health, Environmental and Occupational Health, 12 papers in Epidemiology and 11 papers in Physiology. Recurrent topics in Ulf Hammar's work include Malaria Research and Control (9 papers), Mosquito-borne diseases and control (8 papers) and Diet and metabolism studies (6 papers). Ulf Hammar is often cited by papers focused on Malaria Research and Control (9 papers), Mosquito-borne diseases and control (8 papers) and Diet and metabolism studies (6 papers). Ulf Hammar collaborates with scholars based in Sweden, United States and Australia. Ulf Hammar's co-authors include Rolf Hultcrantz, Patrik Nasr, Hannes Hagström, Per Stål, Mattias Ekstedt, Stergios Kechagias, Anna Färnert, Manijeh Vafa Homann, Tove Fall and Matteo Bottai and has published in prestigious journals such as Journal of Biological Chemistry, Gastroenterology and PLoS ONE.

In The Last Decade

Ulf Hammar

64 papers receiving 2.3k 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.

Fibrosis stage but not NASH predicts mortality and time to development of severe liver disease in biopsy-proven NAFLD

2017 732 citations Ulf Hammar, Rolf Hultcrantz et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Ulf Hammar Sweden	24	1.2k	590	421	400	298	67	2.3k
Sonia Román Mexico	29	1.1k 0.9×	817 1.4×	584 1.4×	258 0.6×	232 0.8×	138	2.7k
Arnoldo Riquelme Chile	27	891 0.8×	344 0.6×	447 1.1×	592 1.5×	804 2.7×	142	2.8k
Guglielmo M. Trovato Italy	24	611 0.5×	187 0.3×	381 0.9×	300 0.8×	156 0.5×	89	1.7k
Fariborz Mansour‐Ghanaei Iran	25	694 0.6×	380 0.6×	182 0.4×	123 0.3×	540 1.8×	178	2.1k
Eran Israeli Israel	32	1.2k 1.0×	153 0.3×	522 1.2×	273 0.7×	724 2.4×	96	3.5k
Rongbin Yu China	25	854 0.7×	530 0.9×	94 0.2×	146 0.4×	174 0.6×	131	2.2k
Salvador Resino Spain	31	1.9k 1.7×	1.0k 1.8×	96 0.2×	216 0.5×	167 0.6×	297	4.1k
Patrick Mallon Ireland	38	804 0.7×	167 0.3×	154 0.4×	154 0.4×	240 0.8×	198	4.2k
David Price United Kingdom	26	950 0.8×	209 0.4×	233 0.6×	112 0.3×	619 2.1×	106	2.9k
Cecilia M. Shikuma United States	35	959 0.8×	233 0.4×	265 0.6×	126 0.3×	197 0.7×	156	4.2k

Countries citing papers authored by Ulf Hammar

Since Specialization

Citations

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

Fields of papers citing papers by Ulf Hammar

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ulf Hammar

This figure shows the co-authorship network connecting the top 25 collaborators of Ulf Hammar. A scholar is included among the top collaborators of Ulf Hammar 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 Ulf Hammar. Ulf Hammar 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

Lin, Yi‐Ting, Sergi Sayols-Baixeras, Gabriel Baldanzi, et al.. (2025). The association between the gut microbiome and 24-h blood pressure measurements in the SCAPIS study. Communications Medicine. 5(1). 276–276.

Dekkers, Koen F., Luciano Raso, Ulf Hammar, et al.. (2025). Plasma metabolite profiles of meat intake and their association with cardiovascular disease risk: A population-based study in Swedish cohorts. Metabolism. 168. 156188–156188. 3 indexed citations

Andersson, Roland E., et al.. (2022). Minor impact on fertility in men with inflammatory bowel disease: A National Cohort Study from Sweden. Alimentary Pharmacology & Therapeutics. 56(2). 292–300. 7 indexed citations

Baldanzi, Gabriel, Ulf Hammar, Tove Fall, et al.. (2021). Evening chronotype is associated with elevated biomarkers of cardiometabolic risk in the EpiHealth cohort: a cross-sectional study. SLEEP. 45(2). 34 indexed citations

Hammar, Ulf, et al.. (2021). A longitudinal study of plasma BAFF levels in mothers and their infants in Uganda, and correlations with subsets of B cells. PLoS ONE. 16(1). e0245431–e0245431. 4 indexed citations

Owusu‐Agyei, Seth, Muhammad Asghar, Ulf Hammar, et al.. (2020). Profiles of Plasmodium falciparum infections detected by microscopy through the first year of life in Kintampo a high transmission area of Ghana. PLoS ONE. 15(10). e0240814–e0240814. 5 indexed citations

Lundström, Mats, et al.. (2020). Patient‐reported visual function outcome in cataract surgery: test–retest reliability of the Catquest‐9SF questionnaire. Acta Ophthalmologica. 98(8). 828–832. 5 indexed citations

Kamble, Prasad G., Jenny Theorell‐Haglöw, Urban Wiklund, et al.. (2020). Sleep apnea in men is associated with altered lipid metabolism, glucose tolerance, insulin sensitivity, and body fat percentage. Endocrine. 70(1). 48–57. 14 indexed citations

Katsogiannos, Petros, Prasad G. Kamble, Urban Wiklund, et al.. (2020). Rapid changes in neuroendocrine regulation may contribute to reversal of type 2 diabetes after gastric bypass surgery. Endocrine. 67(2). 344–353. 20 indexed citations

10.

Yman, Victor, Grace M. Wandell, Muhammad Asghar, et al.. (2019). Persistent transmission of Plasmodium malariae and Plasmodium ovale species in an area of declining Plasmodium falciparum transmission in eastern Tanzania. PLoS neglected tropical diseases. 13(5). e0007414–e0007414. 81 indexed citations

11.

Sawe, Hendry R., et al.. (2019). m-Health for Burn Injury Consultations in a Low-Resource Setting: An Acceptability Study Among Health Care Providers. Telemedicine Journal and e-Health. 26(4). 395–405. 29 indexed citations

12.

Hammar, Ulf, et al.. (2019). Perforations and bleeding in a population‐based cohort of all registered colonoscopies in Sweden from 2001 to 2013. United European Gastroenterology Journal. 7(1). 130–137. 1 indexed citations

13.

Ekbom, Anders, et al.. (2018). Rates and characteristics of postcolonoscopy colorectal cancer in the Swedish IBD population: what are the differences from a non-IBD population?. Gut. 68(9). 1588–1596. 23 indexed citations

14.

Sandvik, Pernilla, et al.. (2018). Picky eating in Swedish preschoolers of different weight status: application of two new screening cut-offs. International Journal of Behavioral Nutrition and Physical Activity. 15(1). 74–74. 27 indexed citations

15.

Bekele, A, Nebiat Gebreselassie, Endale Kassa, et al.. (2018). Daily adjunctive therapy with vitamin D₃ and phenylbutyrate supports clinical recovery from pulmonary tuberculosis: a randomized controlled trial in Ethiopia. Journal of Internal Medicine. 284(3). 292–306. 56 indexed citations

16.

Göransson, Katarina E., et al.. (2018). Predicting neurologically intact survival after in-hospital cardiac arrest-external validation of the Good Outcome Following Attempted Resuscitation score. Resuscitation. 128. 63–69. 27 indexed citations

17.

Ek, Anna, Christina Alexandrou, Christine Delisle Nyström, et al.. (2018). The Smart City Active Mobile Phone Intervention (SCAMPI) study to promote physical activity through active transportation in healthy adults: a study protocol for a randomised controlled trial. BMC Public Health. 18(1). 880–880. 27 indexed citations

18.

Klevebro, Susanna, Pia Lundgren, Ulf Hammar, et al.. (2016). Cohort study of growth patterns by gestational age in preterm infants developing morbidity. BMJ Open. 6(11). e012872–e012872. 33 indexed citations

19.

Hammar, Ulf, et al.. (2016). Massive Blood Transfusion in Patients with Ruptured Abdominal Aortic Aneurysm. European Journal of Vascular and Endovascular Surgery. 52(5). 597–603. 10 indexed citations

20.

James, Anna, Lovisa E. Reinius, Marri Verhoek, et al.. (2015). Increased YKL-40 and Chitotriosidase in Asthma and Chronic Obstructive Pulmonary Disease. American Journal of Respiratory and Critical Care Medicine. 193(2). 131–142. 89 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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