Sonja Hansen

4.8k total citations · 1 hit paper
62 papers, 2.4k citations indexed

About

Sonja Hansen is a scholar working on Infectious Diseases, Applied Microbiology and Biotechnology and Critical Care and Intensive Care Medicine. According to data from OpenAlex, Sonja Hansen has authored 62 papers receiving a total of 2.4k indexed citations (citations by other indexed papers that have themselves been cited), including 28 papers in Infectious Diseases, 23 papers in Applied Microbiology and Biotechnology and 18 papers in Critical Care and Intensive Care Medicine. Recurrent topics in Sonja Hansen's work include Antibiotic Use and Resistance (23 papers), Nosocomial Infections in ICU (18 papers) and Infection Control in Healthcare (17 papers). Sonja Hansen is often cited by papers focused on Antibiotic Use and Resistance (23 papers), Nosocomial Infections in ICU (18 papers) and Infection Control in Healthcare (17 papers). Sonja Hansen collaborates with scholars based in Germany, Sweden and France. Sonja Hansen's co-authors include Petra Gastmeier, Michael Behnke, Stig Bengmark, Daniel Seehofer, Nada Rayes, P. Neuhaus, Stefan Serke, H. Rüden, Sabine Stamm-Balderjahn and Irina Zuschneid and has published in prestigious journals such as SHILAP Revista de lepidopterología, Journal of Hepatology and The Lancet Infectious Diseases.

In The Last Decade

Sonja Hansen

60 papers receiving 2.3k citations

Hit Papers

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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.

Prevalence of healthcare-associated infections, estimated incidence and composite antimicrobial resistance index in acute care hospitals and long-term care facilities: results from two European point prevalence surveys, 2016 to 2017

2018 448 citations C. Suetens, Katrien Latour et al. profile →

Author Peers

Peers are selected by citation overlap in the author's most active subfields. citations · hero ref

Author						Papers	Cites
Sonja Hansen	823	555	515	484	431	62	2.4k
Guy A. Richards	628 0.8×	490 0.9×	804 1.6×	266 0.5×	178 0.4×	163	3.2k
S Bagheri Nejad	1.0k 1.2×	553 1.0×	312 0.6×	515 1.1×	368 0.9×	13	2.4k
Christine Geffers	1.2k 1.4×	633 1.1×	1.2k 2.4×	1.3k 2.7×	592 1.4×	164	4.2k
Wilco C. Graafmans	716 0.9×	415 0.7×	346 0.7×	409 0.8×	355 0.8×	22	2.6k
M. Lindsay Grayson	1.6k 1.9×	369 0.7×	1.4k 2.7×	275 0.6×	621 1.4×	95	4.9k
Mary Alexander	879 1.1×	324 0.6×	1.2k 2.2×	1.1k 2.3×	1.1k 2.5×	23	6.5k
Connie Price	2.0k 2.4×	430 0.8×	949 1.8×	215 0.4×	576 1.3×	99	4.0k
Beryl Primrose Gladstone	954 1.2×	497 0.9×	392 0.8×	126 0.3×	259 0.6×	47	2.2k
Jonas Marschall	807 1.0×	409 0.7×	973 1.9×	332 0.7×	620 1.4×	146	3.3k
Caroline Marshall	775 0.9×	464 0.8×	596 1.2×	133 0.3×	433 1.0×	120	2.3k

Countries citing papers authored by Sonja Hansen

Since Specialization

Citations

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

Fields of papers citing papers by Sonja Hansen

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Sonja Hansen

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

Grisold, Andrea, Agnes Wechsler-Fördös, Michael Behnke, et al.. (2025). State of infection prevention and control in Austrian hospitals: data from 81 hospitals completing the WHO Infection Prevention and Control Assessment Framework (IPCAF). Antimicrobial Resistance and Infection Control. 14(1). 18–18. 2 indexed citations

Hansen, Sonja, et al.. (2024). Assessing infection prevention and control structures in German hospitals after the COVID-19 pandemic using the WHO infection prevention and control assessment framework (IPCAF): results from 660 hospitals and comparison with a pre-pandemic survey. Antimicrobial Resistance and Infection Control. 13(1). 103–103. 3 indexed citations

Hansen, Sonja, et al.. (2024). Sexual and gender minority health: a roadmap for developing evidence-based medical school curricula. SHILAP Revista de lepidopterología. 15(4). 93–114.

Maechler, Friederike, Frank Schwab, Sonja Hansen, et al.. (2023). Quantification of time delay between screening and subsequent initiation of contact isolation for carriers of extended-spectrum beta-lactamase (ESBL)–producing Enterobacterales: A post hoc subgroup analysis of the R-GNOSIS WP5 Trial. Infection Control and Hospital Epidemiology. 44(9). 1410–1416. 2 indexed citations

Pin, Martin, Rajan Somasundaram, Christian Wrede, et al.. (2022). Antimicrobial resistance control in the emergency department: a need for concrete improvement. Antimicrobial Resistance and Infection Control. 11(1). 94–94. 2 indexed citations

Aghdassi, Seven Johannes Sam, Frank Schwab, Luis Alberto Peña Diaz, et al.. (2022). Risk factors for nosocomial SARS-CoV-2 infections in patients: results from a retrospective matched case–control study in a tertiary care university center. Antimicrobial Resistance and Infection Control. 11(1). 9–9. 10 indexed citations

Berger, Christian, et al.. (2020). Elektive Tracheostomie bei COVID-19-Patienten – Erfahrungen mit einem standardisierten interdisziplinären Vorgehen. HNO. 68(11). 838–846. 1 indexed citations

Aghdassi, Seven Johannes Sam, Andrea Grisold, Agnes Wechsler-Fördös, et al.. (2020). Evaluating infection prevention and control programs in Austrian acute care hospitals using the WHO Infection Prevention and Control Assessment Framework. Antimicrobial Resistance and Infection Control. 9(1). 92–92. 29 indexed citations

Aghdassi, Seven Johannes Sam, Sonja Hansen, P. Bischoff, Michael Behnke, & Petra Gastmeier. (2019). A national survey on the implementation of key infection prevention and control structures in German hospitals: results from 736 hospitals conducting the WHO Infection Prevention and Control Assessment Framework (IPCAF). Antimicrobial Resistance and Infection Control. 8(1). 73–73. 42 indexed citations

10.

Tomczyk, Sara, Seven Johannes Sam Aghdassi, Julie Storr, et al.. (2019). Testing of the WHO Infection Prevention and Control Assessment Framework at acute healthcare facility level. Journal of Hospital Infection. 105(1). 83–90. 23 indexed citations

11.

Suetens, C., Katrien Latour, Tommi Kärki, et al.. (2018). Prevalence of healthcare-associated infections, estimated incidence and composite antimicrobial resistance index in acute care hospitals and long-term care facilities: results from two European point prevalence surveys, 2016 to 2017. Archive ouverte UNIGE (University of Geneva). 48 indexed citations

12.

Hansen, Sonja, Frank Schwab, Sandra M. Schneider, et al.. (2014). Time-series analysis to observe the impact of a centrally organized educational intervention on the prevention of central-line-associated bloodstream infections in 32 German intensive care units. Journal of Hospital Infection. 87(4). 220–226. 13 indexed citations

13.

Behnke, Michael, Sonja Hansen, Rasmus Leistner, et al.. (2013). Nosocomial Infection and Antibiotic Use. Deutsches Ärzteblatt international. 110(38). 627–33. 77 indexed citations

14.

Hansen, Sonja, D. Sohr, Christine Geffers, et al.. (2012). Concordance between European and US case definitions of healthcare-associated infections. Antimicrobial Resistance and Infection Control. 1(1). 28–28. 28 indexed citations

15.

Hansen, Sonja, Sabine Stamm-Balderjahn, Irina Zuschneid, et al.. (2007). Closure of medical departments during nosocomial outbreaks: data from a systematic analysis of the literature. Journal of Hospital Infection. 65(4). 348–353. 94 indexed citations

16.

Gastmeier, Petra, Sabine Stamm-Balderjahn, Sonja Hansen, et al.. (2006). Where should one search when confronted with outbreaks of nosocomial infection?. American Journal of Infection Control. 34(9). 603–605. 35 indexed citations

17.

Gastmeier, Petra, et al.. (2005). How Outbreaks Can Contribute to Prevention of Nosocomial Infection: Analysis of 1,022 Outbreaks. Infection Control and Hospital Epidemiology. 26(4). 357–361. 71 indexed citations

18.

Gastmeier, Petra, et al.. (2004). Der Beitrag von Ausbruchanalysen zur Pr�vention nosokomialer Infektionen. Bundesgesundheitsblatt - Gesundheitsforschung - Gesundheitsschutz. 47(4). 334–338. 3 indexed citations

19.

Rayes, Nada, et al.. (2002). Einfluss von Probiotika und Ballaststoffen auf die Inzidenz bakterieller Infektionen nach viszeralchirurgischen Eingriffen - Ergebnisse einer prospektiven Studie. Zeitschrift für Gastroenterologie. 40(10). 869–876. 54 indexed citations

20.

Rayes, Nada, Sonja Hansen, Daniel Seehofer, et al.. (2002). Early enteral supply of fiber and Lactobacilli versus conventional nutrition: a controlled trial in patients with major abdominal surgery. Nutrition. 18(7-8). 609–615. 184 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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