Karin Källén

12.2k total citations · 4 hit papers
239 papers, 7.8k citations indexed

About

Karin Källén is a scholar working on Pediatrics, Perinatology and Child Health, Obstetrics and Gynecology and Pulmonary and Respiratory Medicine. According to data from OpenAlex, Karin Källén has authored 239 papers receiving a total of 7.8k indexed citations (citations by other indexed papers that have themselves been cited), including 151 papers in Pediatrics, Perinatology and Child Health, 93 papers in Obstetrics and Gynecology and 79 papers in Pulmonary and Respiratory Medicine. Recurrent topics in Karin Källén's work include Neonatal Respiratory Health Research (77 papers), Birth, Development, and Health (45 papers) and Pregnancy and preeclampsia studies (45 papers). Karin Källén is often cited by papers focused on Neonatal Respiratory Health Research (77 papers), Birth, Development, and Health (45 papers) and Pregnancy and preeclampsia studies (45 papers). Karin Källén collaborates with scholars based in Sweden, Norway and Denmark. Karin Källén's co-authors include Karel Maršál, Bëngt Källén, Fredrik Serenius, Mikael Norman, Ann Thurin‐Kjellberg, Lena Hellström‐Westas, Christina Bergh, Per Olofsson, Bo Jacobsson and Andreas Herbst and has published in prestigious journals such as JAMA, PLoS ONE and The Science of The Total Environment.

In The Last Decade

Karin Källén

223 papers receiving 7.6k 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.

One-Year Survival of Extremely Preterm Infants After Active Perinatal Care in Sweden

2009 487 citations Lena Hellström‐Westas, Mikael Norman et al. profile →
Neurodevelopmental Outcome in Extremely Preterm Infants at 2.5 Years After Active Perinatal Care in Sweden

2013 396 citations Fredrik Serenius, Karin Källén et al. profile →
Association Between Year of Birth and 1-Year Survival Among Extremely Preterm Infants in Sweden During 2004-2007 and 2014-2016

2019 199 citations Mikael Norman, Boubou Hallberg et al. profile →
The Swedish medical birth register during five decades: documentation of the content and quality of the register

2023 149 citations Karin Källén, Olof Stephansson et al. profile →

Peers

Countries citing papers authored by Karin Källén

Since Specialization

Citations

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

Fields of papers citing papers by Karin Källén

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Karin Källén

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

#	Work	Indexed citations
1	Timing of Term Births and Associated Mortality Risks: Ecological Analysis Across 28 European Countries 2025 ·BJOG An International Journal of Obstetrics & Gynaecology ·(unknown), (unknown), Mika Gissler, Karin Källén, Kari Klungsøyr, (unknown), (unknown), Luule Sakkeus, Vlad Tica, Jennifer Zeitlin	0
2	Centralisation of extremely preterm births and decreased early postnatal mortality in Sweden, 2004‐2007 versus 2014‐2016 2024 ·Acta Paediatrica ·Christian Gadsbøll, Lars Björklund, Mikael Norman, Thomas Abrahamsson, Magnus Domellöf, Anders Elfvin, Aijaz Farooqi, Lena Hellström‐Westas, (unknown), Karin Källén, Erik Normann, Fredrik Serenius, Karin Sävman, Petra Um‐Bergström, Ulrika Ådén, David Ley	2
3	One-year survival and outcomes of infants born at 22 and 23 weeks of gestation in Sweden 2004–2007, 2014–2016 and 2017–2019 2023 ·Archives of Disease in Childhood Fetal & Neonatal ·Aijaz Farooqi, Stellan Håkansson, Fredrik Serenius, Karin Källén, Lars Björklund, Erik Normann, Magnus Domellöf, Ulrika Ådén, Thomas Abrahamsson, Anders Elfvin, Karin Sävman, Petra Um‐Bergström, Olof Stephansson, David Ley, Lena Hellström‐Westas, Mikael Norman	12
4	Gestational diabetes mellitus and time in active labor: A population‐based cohort study 2023 ·Acta Obstetricia Et Gynecologica Scandinavica ·(unknown), (unknown), Karin Källén, Caroline Lilliecreutz, Marie Blomberg	4
5	Perinatal risk factors for developmental coordination disorder in children born extremely preterm 2023 ·Acta Paediatrica ·Jenny Bolk, Karin Källén, Aijaz Farooqi, Maria Hafström, Vineta Fellman, Ulrika Ådén, Fredrik Serenius	7
6	Detection and clinical outcome of small‐for‐gestational‐age fetuses in the third trimester—A comparison between routine ultrasound examination and examination on indication 2021 ·Acta Obstetricia Et Gynecologica Scandinavica ·(unknown), Karel Maršál, Karin Källén	4
7	COVID‐19 in pregnancy—characteristics and outcomes of pregnant women admitted to hospital because of SARS‐CoV‐2 infection in the Nordic countries 2021 ·Acta Obstetricia Et Gynecologica Scandinavica ·Hilde Engjom, Anna J. M. Aabakke, Kari Klungsøyr, Teresia Svanvik, (unknown), (unknown), Lars Thurn, (unknown), Karin Pettersson, Lill Trine Nyfløt, Iqbal Al‐Zirqi, Siri Vangen, Pétur Benedikt Júlíusson, Karin Källén, Mika Gissler, Lone Krebs	29
8	Association Between Year of Birth and 1-Year Survival Among Extremely Preterm Infants in Sweden During 2004–2007 and 2014–2016 2019 ·Obstetrical & Gynecological Survey ·Mikael Norman, Boubou Hallberg, Thomas Abrahamsson, Lars Björklund, Magnus Domellöf, Aijaz Farooqi, Cathrine Foyn Bruun, Christian Gadsbøll, Lena Hellström‐Westas, Fredrik Ingemansson, Karin Källén, David Ley, Karel Maršál, Erik Normann, Fredrik Serenius, Olof Stephansson, Lennart Stigson, Petra Um‐Bergström, Stellan Håkansson	64
9	Maternal plasma leptin levels in relation to the duration of the active phase of labor 2018 ·Acta Obstetricia Et Gynecologica Scandinavica ·(unknown), Karin Källén, Annika Thorsell, Marie Blomberg	6
10	Results from the National Perinatal Patient Safety Program in Sweden: the challenge of evaluation 2016 ·Acta Obstetricia Et Gynecologica Scandinavica ·(unknown), Karin Källén, Monica Nyström, Ulf Högberg, (unknown), Karin Pukk Härenstam, Charlotta Grünewald	11
11	Prospective population‐based cohort study of maternal obesity as a source of error in gestational age estimation at 11–14 weeks 2016 ·Acta Obstetricia Et Gynecologica Scandinavica ·(unknown), (unknown), Karin Källén, Kjell Å. Salvesen	7
12	Neurodevelopmental Outcomes Among Extremely Preterm Infants 6.5 Years After Active Perinatal Care in Sweden 2016 ·JAMA Pediatrics ·Fredrik Serenius, Uwe Ewald, Aijaz Farooqi, Vineta Fellman, Maria Hafström, Kerstin Hellgren, Karel Maršál, Andreas Ohlin, Elisabeth Olhager, Karin Stjernqvist, Bo Strömberg, Ulrika Ådén, Karin Källén, (unknown)	224
13	Cancer in children and young adults born after assisted reproductive technology: a Nordic cohort study from the Committee of Nordic ART and Safety (CoNARTaS) 2014 ·WOS ·(unknown), Anna-Karina Aaris Henningsen, Karin Källén, Christina Bergh, Liv Bente Romundstad, Mika Gissler, Anja Pinborg, Rolv Skjærven, Aila Tiitinen, Ditte Vassard, Birgitta Lannering, Ulla‐Britt Wennerholm	2
14	Neurodevelopmental Outcome in Extremely Preterm Infants at 2.5 Years After Active Perinatal Care in Sweden 2013 ·Obstetrical & Gynecological Survey ·Fredrik Serenius, Karin Källén, Mats Blennow, Uwe Ewald, Vineta Fellman, Gerd Holmström, Eva Lindberg, Pia Lundqvist, Karel Maršál, Mikael Norman, Elisabeth Olhager, Lennart Stigson, Karin Stjernqvist, Brigitte Vollmer, Bo Strömberg	0
15	Obstetric outcome after in vitro fertilization with single or double embryo transfer 2010 ·Human Reproduction ·A. Sazonova, Karin Källén, Ann Thurin‐Kjellberg, Ulla‐Britt Wennerholm, Christina Bergh	70
16	Perinatal outcome in women with Turner karyotype 2010 ·Human Reproduction ·(unknown), Inger Bryman, (unknown), Karin Källén, Kerstin Landin‐Wilhelmsen, Marie‐Louise Barrenäs, Ulla‐Britt Wennerholm	1
17	ROP in Extremely Immature Infants Born Before 27 Weeks of Gestation Between 2004 and 2007 in Sweden - The EXPRESS Study (EXtremely PREterm Infants Study in Sweden) 2009 ·Investigative Ophthalmology & Visual Science ·Dordi Austeng, Karin Källén, Uwe Ewald, Ann Hellström, Peter Jakobsson, Kari Johansson, Kristina Törnqvist, Agneta Wallin, Gerd Holmström	1
18	INCIDENCE AND RISK FACTORS FOR NEONATAL SEIZURES IN SWEDEN 2008 ·Archives of Disease in Childhood ·Lena Hellström‐Westas, Isis Amer‐Wåhlin, Johan Ågren, Karin Källén	3
19	Kejsarsnitt I Sverige 1990-2001 2005 ·Lund University Publications (Lund University) ·Karin Källén, (unknown), Petra Otterblad Olausson	2
20	Maternal smoking and twinning 1998 ·Twin Research ·Karin Källén	4

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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