In academia, publishing articles showcases expertise and credibility. Journals with high impact factors signal significance in the field. Understanding how to gauge a journal’s impact can enhance your publication strategy. Impact factor, a key metric, reflects a journal’s influence over time. Calculating it involves dividing the number of citations by the total articles published. Assessing personal impact also matters, considering citations to your own work. This article explores the significance, methodology, and implications of impact factors, empowering academics and professionals to navigate the publishing landscape strategically and enhance their scholarly footprint.
What is Impact factor?
The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as indexed by Clarivate’s Web of Science.
As a journal-level metric, it is frequently used as a proxy for the relative importance of a journal within its field; journals with higher impact factor values are given the status of being more important, or carry more prestige in their respective fields, than those with lower values.
While frequently used by universities and funding bodies to decide on promotion and research proposals, it has been criticised for distorting good scientific practices [1-3].
Why is the impact factor important?
Impact factor, an index based on the frequency with which a journal’s articles are cited in scientific publications, is a putative marker of journal quality [4]. A journal’s impact factor holds immense sway over funding, submissions, and the reputation of publishers and academics. Upholding publication quality not only boosts citation rates but also enhances a journal’s ranking. High impact factor journals signal meticulous management and prestige, fostering a virtuous cycle of scholarly engagement and recognition.
How to calculate the journal impact factor?
Journal Impact Factor (JIF) is calculated by Clarivate Analytics as the average of the sum of the citations received in a given year to a journal’s previous two years of publications (linked to the journal, but not necessarily to specific publications) divided by the sum of “citable” publications in the previous two years [5].
The calculation is based on a two-year period and involves dividing the number of times articles were cited by the number of articles that are citable.
Calculation of 2010 IF of a journal:
A = the number of times articles published in 2008 and 2009 were cited by indexed journals during 2010. B = the total number of “citable items” published in 2008 and 2009.
A/B = 2010 impact factor
The Impact Factor is reported in Journal Citation Reports (JCR)
CiteScore, which is similar to the IF but is based on a 4-year period.
Impact Factor Controversy
The impact factor (IF), widely used in academia, has sparked debate due to its limitations. It quantifies a journal’s influence based on citations received by its articles within a specific time frame (usually two years). However, critics argue that it oversimplifies research quality and favors certain fields [6]. Indeed, the fact that it is simple to understand – it is roughly the average number of citations that primary research papers published in two consecutive years gather in the following year – makes it all too easy to point out its shortcomings: the metric also includes citations to non-primary content (such as reviews and news articles); for many fields, citations accumulate slowly and thus the two-year time window seems too short; and the average number of citations per paper can be skewed by a few highly cited ones, of which high-impact journals have a big share [7]. Furthermore, a recent study found that papers published in predatory journals, which often lack rigorous peer review, have little scientific impact. Around 60% of these papers hadn’t attracted any citations at all, and less than 3% received more than 10 citations [8]. As we rethink science publishing, there’s a growing need for a broader, more-transparent suite of metrics to judge journals beyond the traditional impact factor [9]. Researchers and institutions should consider these complexities when evaluating scholarly work and avoid relying solely on impact factors for assessing journal quality.
Recent Biggest Discoveries and advances in Nephrology (2024)
Elevating Kidney Disease on the Global Health Stage:
Global nephrology societies have called on the World Health Organization (WHO) and health communities to tackle the growing burden of chronic kidney disease (CKD). CKD is the third fastest-growing cause of death and affects approximately 850 million people worldwide. Most of these individuals live in low-income and lower-middle-income countries and are often unaware of their condition, making early intervention challenging. The International Society of Nephrology (ISN) and other organizations recommend including kidney disease in the WHO’s global noncommunicable disease (NCD) health agenda. This inclusion would raise awareness, foster investment, and promote coordinated efforts to reduce the impact of CKD globally [10].
Global Impact of Chronic Kidney Disease (CKD):
A modelling analysis by AstraZeneca, IMPACT CKD, forecasts that up to 16.5% of the population across eight countries (including the United States, Brazil, the United Kingdom, Spain, Germany, the Netherlands, China, and Australia) will suffer from CKD by 2032. This includes a rise of up to 59.3% in advanced-stage CKD. The study highlights an urgent and growing global health crisis with profound economic and environmental implications [11].
Emerging Leaders Program (ELP):
The ISN introduced its 2024 Emerging Leaders Program (ELP). Thirteen ISN members from seven regions were selected for the third ELP cohort. These talented future leaders will engage in collaborative leadership and problem-solving training to impact global kidney health initiatives [12].
World Congress of Nephrology (WCN’24):
The WCN’24, a significant annual global gathering of kidney experts and professionals, provides comprehensive insights into the latest developments and breakthroughs in kidney care. It covers five key themes, including innovations in transplantation and environmental approaches for improving kidney health.
References
Waltman L, Traag VA (1 March 2021). “Use of the journal impact factor for assessing individual articles: Statistically flawed or not?”. F1000Research. 9: 366. doi:10.12688/f1000research.23418.2
Curry S (February 2018). “Let’s move beyond the rhetoric: it’s time to change how we judge research”. Nature. 554 (7691): 147. Bibcode:2018Natur.554..147C. doi:10.1038/d41586-018-01642-w
Hutchins, BI; Yuan, X; Anderson, JM; Santangelo, GM (September 2016). “Relative Citation Ratio (RCR): A New Metric That Uses Citation Rates to Measure Influence at the Article Level”. PLOS Biology. 14 (9): e1002541. doi:10.1371/journal.pbio.1002541
Saha S, Saint S, Christakis DA. Impact factor: a valid measure of journal quality? J Med Libr Assoc. 2003 Jan;91(1):42-6. PMID: 12572533; PMCID: PMC141186.
Wouters, P., Sugimoto, C. R., Larivière, V., McVeigh, M. E., Pulverer, B., de Rijcke, S., & Waltman, L. (2019). Rethinking impact factors: better ways to judge a journal. Nature, 569(7758), 621-623. https://www.nature.com/articles/d41586-019-01643-3
Samaan, F., Silveira, R.C., Mouro, A. et al.Laboratory-based surveillance of chronic kidney disease in people with private health coverage in Brazil. BMC Nephrol25, 162 (2024). https://doi.org/10.1186/s12882-024-03597-9
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