Þórhallur I. Halldórsson

14.9k total citations · 1 hit paper
182 papers, 5.3k citations indexed

About

Þórhallur I. Halldórsson is a scholar working on Pediatrics, Perinatology and Child Health, Public Health, Environmental and Occupational Health and Obstetrics and Gynecology. According to data from OpenAlex, Þórhallur I. Halldórsson has authored 182 papers receiving a total of 5.3k indexed citations (citations by other indexed papers that have themselves been cited), including 68 papers in Pediatrics, Perinatology and Child Health, 65 papers in Public Health, Environmental and Occupational Health and 42 papers in Obstetrics and Gynecology. Recurrent topics in Þórhallur I. Halldórsson's work include Birth, Development, and Health (64 papers), Obesity, Physical Activity, Diet (38 papers) and Gestational Diabetes Research and Management (34 papers). Þórhallur I. Halldórsson is often cited by papers focused on Birth, Development, and Health (64 papers), Obesity, Physical Activity, Diet (38 papers) and Gestational Diabetes Research and Management (34 papers). Þórhallur I. Halldórsson collaborates with scholars based in Iceland, Denmark and United States. Þórhallur I. Halldórsson's co-authors include Sjúrđur F. Olsen, Marin Strøm, Ekaterina Maslova, Bodil Hammer Bech, Dorte Rytter, Inga Þórsdóttir, Tine Brink Henriksen, Line Småstuen Haug, Vibeke Kildegaard Knudsen and Georg Becher and has published in prestigious journals such as Environmental Science & Technology, PLoS ONE and Analytical Chemistry.

In The Last Decade

Þórhallur I. Halldórsson

172 papers receiving 5.2k 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.

Nordic Nutrition Recommendations 2023

2023 230 citations Rune Blomhoff, Maijaliisa Erkkola et al. profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Þórhallur I. Halldórsson Iceland	41	1.6k	1.6k	1.3k	1.1k	872	182	5.3k
Leda Chatzi Greece	45	1.2k 0.8×	1.6k 1.0×	1.7k 1.3×	1.0k 0.9×	403 0.5×	125	5.2k
Jesús Vioqué Spain	51	2.6k 1.6×	1.4k 0.9×	1.8k 1.4×	683 0.6×	1.0k 1.2×	241	8.1k
Anne Lise Brantsæter Norway	52	2.5k 1.5×	2.2k 1.4×	2.0k 1.5×	1.8k 1.7×	1.3k 1.5×	214	8.1k
Edwina Yeung United States	40	1.3k 0.8×	1.9k 1.2×	576 0.4×	1.7k 1.6×	377 0.4×	180	5.2k
Marisa Rebagliato Spain	47	1.2k 0.7×	2.2k 1.4×	2.2k 1.7×	761 0.7×	605 0.7×	131	6.0k
Carmen Íñiguez Spain	45	920 0.6×	1.3k 0.8×	3.7k 2.9×	741 0.7×	375 0.4×	164	6.3k
Helle Margrete Meltzer Norway	58	3.1k 1.9×	2.4k 1.5×	2.8k 2.2×	1.9k 1.8×	1.8k 2.1×	222	10.7k
Marie‐France Hivert United States	49	1.6k 0.9×	2.9k 1.8×	1.2k 0.9×	2.5k 2.3×	500 0.6×	346	9.1k
Audrey J. Gaskins United States	48	1.8k 1.1×	1.8k 1.1×	1.6k 1.3×	986 0.9×	336 0.4×	184	6.4k
Margaretha Haugen Norway	59	3.3k 2.0×	3.1k 1.9×	2.0k 1.6×	3.3k 3.1×	1.3k 1.5×	212	11.5k

Countries citing papers authored by Þórhallur I. Halldórsson

Since Specialization

Citations

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

Fields of papers citing papers by Þórhallur I. Halldórsson

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Þórhallur I. Halldórsson. 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 Þórhallur I. Halldórsson. The network helps show where Þórhallur I. Halldórsson may publish in the future.

Co-authorship network of co-authors of Þórhallur I. Halldórsson

This figure shows the co-authorship network connecting the top 25 collaborators of Þórhallur I. Halldórsson. A scholar is included among the top collaborators of Þórhallur I. Halldórsson 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 Þórhallur I. Halldórsson. Þórhallur I. Halldórsson 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

Halldórsson, Þórhallur I., et al.. (2025). Maternal socioeconomic and physical activity level in pregnancy is associated with offspring’s sport-related physical activity at age 14 years in a Danish prospective cohort study. European Journal of Public Health. 35(3). 541–547.

Olsen, Steen, et al.. (2025). Maternal mid-pregnancy dietary patterns and inflammatory bowel disease in offspring from a prospective cohort study. Communications Medicine. 6(1). 80–80.

Brix, Nis, Jörg Schullehner, Gunnar Toft, et al.. (2024). Maternal use of nitrosatable drugs during pregnancy and adult male reproductive health: A population‐based cohort study. Andrology. 12(8). 1740–1750.

Bjerregaard, Anne Ahrendt, Jørgen Vinsløv Hansen, Charlotta Granström, et al.. (2024). An SMS chatbot digital educational program to increase healthy eating behaviors in adolescence: A multifactorial randomized controlled trial among 7,890 participants in the Danish National Birth Cohort. PLoS Medicine. 21(6). e1004383–e1004383. 5 indexed citations

Harwatt, Helen, Tim G. Benton, Jan Bengtsson, et al.. (2024). Environmental sustainability of food production and consumption in the Nordic and Baltic region – a scoping review for Nordic Nutrition Recommendations 2023. Food & Nutrition Research. 68. 12 indexed citations

Hjaltadóttir, Ingibjörg, Lenore J. Launer, Kristín Siggeirsdóttir, et al.. (2023). Milk intake and hip fracture incidence in community-dwelling old Icelandic adults. Osteoporosis International. 34(11). 1951–1959.

Sigurðardóttir, Þorgerður, Þóra Steingrímsdóttir, Reynir Tómas Geirsson, et al.. (2023). Postpartum pelvic organ prolapse and pelvic floor muscle training: secondary analysis of a randomized controlled trial of primiparous women. International Urogynecology Journal. 34(6). 1319–1326. 4 indexed citations

Urbano, Teresa, et al.. (2022). Dietary intake of potentially toxic elements and children's chemical exposure. Current Opinion in Environmental Science & Health. 30. 100393–100393. 8 indexed citations

Buekers, Jurgen, Sylvie Rémy, Jos Bessems, et al.. (2022). Glyphosate and AMPA in Human Urine of HBM4EU-Aligned Studies: Part B Adults. Toxics. 10(10). 552–552. 14 indexed citations

10.

Halldórsson, Þórhallur I., Reynir Tómas Geirsson, Ragnar Bjarnason, et al.. (2021). Mode of delivery was associated with transient changes in the metabolomic profile of neonates. Acta Paediatrica. 110(7). 2110–2118. 3 indexed citations

11.

More, Simon J., Diane Benford, Susanne Hougaard Bennekou, et al.. (2021). Opinion on the impact of non‐monotonic dose responses on EFSA′s human health risk assessments. EFSA Journal. 19(10). e06877–e06877. 30 indexed citations

12.

Ramel, Alfons, Ingibjörg Hjaltadóttir, Lenore J. Launer, et al.. (2020). Characteristics of incidence hip fracture cases in older adults participating in the longitudinal AGES-Reykjavik study. Osteoporosis International. 32(2). 243–250. 5 indexed citations

13.

Ramel, Alfons, Ingibjörg Hjaltadóttir, Lenore J. Launer, et al.. (2020). Serum 25-Hydroxy-Vitamin D Status and Incident Hip Fractures in Elderly Adults: Looking Beyond Bone Mineral Density. Journal of Bone and Mineral Research. 36(12). 2351–2360. 6 indexed citations

14.

Hrólfsdóttir, Laufey, Þórhallur I. Halldórsson, Bryndís Eva Birgisdóttir, et al.. (2020). Insufficient iodine status in pregnant women as a consequence of dietary changes. Opin vísindi (Opin vísindi). 25 indexed citations

15.

Lund, Marie, Þórhallur I. Halldórsson, Nina Øyen, et al.. (2019). Dietary glycemic index and glycemic load during pregnancy and offspring risk of congenital heart defects: a prospective cohort study. American Journal of Clinical Nutrition. 111(3). 526–535. 12 indexed citations

16.

Halldórsson, Þórhallur I., Thor Aspelund, Guðný Eiríksdóttir, et al.. (2017). Associations between Proportion of Plasma Phospholipid Fatty Acids, Depressive Symptoms and Major Depressive Disorder. Cross-Sectional Analyses from the AGES Reykjavik Study. The journal of nutrition health & aging. 22(3). 354–360. 1 indexed citations

17.

Pedersen, Marie, Þórhallur I. Halldórsson, Sjúrđur F. Olsen, et al.. (2016). Impact of Road Traffic Pollution on Pre-eclampsia and Pregnancy-induced Hypertensive Disorders. Epidemiology. 28(1). 99–106. 74 indexed citations

18.

Renäult, Kristina M., Emma Malchau Carlsen, Kirsten Nørgaard, et al.. (2015). Intake of carbohydrates during pregnancy in obese women is associated with fat mass in the newborn offspring. American Journal of Clinical Nutrition. 102(6). 1475–1481. 40 indexed citations

19.

Halldórsson, Þórhallur I., Gunnar Sigurðsson, Sigurður Sigurdsson, et al.. (2013). Milk consumption throughout life and bone mineral content and density in elderly men and women. Osteoporosis International. 25(2). 663–672. 11 indexed citations

20.

Maslova, Ekaterina, Þórhallur I. Halldórsson, Marin Strøm, & Sjúrđur F. Olsen. (2012). Low-fat yoghurt intake in pregnancy associated with increased child asthma\nand allergic rhinitis risk: a prospective cohort study. Europe PMC (PubMed Central). 18 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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