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Year : 2019  |  Volume : 10  |  Issue : 4  |  Page : 83-84

Correlation Between Number of Mendeley Readers and Citations in Dental Sciences

1 Independent Research Scientist, Associate Editor of Dental Hypotheses, Isfahan, Iran
2 Department of Oral Biology, College of Dentistry, University of Nebraska Medical Center, Lincoln, Nebraska, USA
3 School of Dental Medicine, University of Connecticut, Mansfield, Connecticut, USA

Date of Submission03-Dec-2019
Date of Decision03-Jan-2020
Date of Acceptance03-Jan-2020
Date of Web Publication28-Jan-2020

Correspondence Address:
Jafar Kolahi
No. 24, Faree 15, Pardis, Shahin Shahr, Isfahan
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/denthyp.denthyp_1_20

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How to cite this article:
Kolahi J, Dunning DG, Rossomando EF. Correlation Between Number of Mendeley Readers and Citations in Dental Sciences. Dent Hypotheses 2019;10:83-4

How to cite this URL:
Kolahi J, Dunning DG, Rossomando EF. Correlation Between Number of Mendeley Readers and Citations in Dental Sciences. Dent Hypotheses [serial online] 2019 [cited 2023 Feb 5];10:83-4. Available from:

Mendeley is a London-based company established in November 2007 by three German Ph.D. students. It was named in memoriam of biologist, Gregor Mendel, and chemist, Dmitri Mendeleyev. The company is best known for its reference manager which enjoys wide use by the research community. One of its interesting and notable features is Mendeley reader counts. This metric is defined as the number of unique Mendeley users that have added a specific article to a Mendeley personal library. Geographic location and discipline for Mendeley readers are also available. It is impossible to precisely determine who has bookmarked an article in Mendeley due to user privacy restrictions. However, the number of Mendeley readers for each article is available via

Studies reported positive correlations between number of Mendeley readers and future citations.[1],[2] Strong positive correlations have been reported in most scientific fields, averaging 0.671. However, the correlations in some scientific fields were reported as low as 0.255.[3]

In this investigation, we examined specifically the correlation between the number of Mendeley readers and citations in dental sciences. On December 30, 2019, the Altmetric database (Altmetric LLP, London, UK) was searched with the field of research code “1105 DENTISTRY”. The number of Mendeley readers and citations from the “Dimensions” database of 45,675 dental articles were exported and analyzed using the Pearson correlation coefficient. Data analysis was carried out utilizing R 3.6.1 software (R Foundation for Statistical Computing, Vienna, Austria).

Moderate positive correlation was found between number of Mendeley readers and citations in dental sciences (P<0.01, [Figure 1]).
Figure 1 Correlation between number of Mendeley readers and citations among 45,675 dental articles. Histogram and density of each variable were also showed

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This large scale analysis incorporated dental articles from dental-specific and non-dental journals. For example, an article entitled “Dental caries” published in The Lancet included in this study had 1,218 Mendeley readers and 1,057 citations.[4]

Additionally, a Google trends search with the word “Mendeley” showed interest in this term has increased since 2007 [Figure 2]. With an increase in awareness and knowledge, Mendeley offers a useful and practical academic tool for the research community in dentistry and beyond. It is anticipated that the correlation between the number of Mendeley readers and citations will increase in the future.
Figure 2 Google trends analysis for the search term “Mendeley”. Vertical axis showed interest over time. A value of 100 is the peak popularity for the term. A value of 50 means that the term is half as popular. A score of 0 means there was not enough data for this term. Linear forecast trend-line analyses are also shown. Data are from (accessed 1 Jan 2020)

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We would like to thank Altmetric LLP (London, U.K), particularly Mrs. Stacy Konkiel for her valued support and permitting us complete access to Altmetric data.

Financial support and sponsorship


Conflicts of interest

There are no conflicts of interest.

  References Top

Zahedi Z, Costas R, Wouters P. How well developed are altmetrics?A cross-disciplinary analysis of the presence of ‘alternative metrics’ in scientific publications. Scientometrics 2014;101:1491-513.  Back to cited text no. 1
Thelwall M. Early Mendeley readers correlate with later citation counts. Scientometrics 2018;115:1231-40.  Back to cited text no. 2
Thelwall M. Are Mendeley reader counts useful impact indicators in all fields? Scientometrics 2017;113:1721-31.  Back to cited text no. 3
Selwitz RH, Ismail AI, Pitts NB. Dental caries. Lancet 2007;369:51-9.  Back to cited text no. 4


  [Figure 1], [Figure 2]


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