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Citation analysis of Acta Dermatovenerologica Alpina, Pannonica et Adriatica: 1992-2013.

Introduction

The journal Acta Dermatovenerologica Alpina, Pannonica et Adriatica (Acta Dermatovenerol APA) was founded in 1992 in Ljubljana by Aleksej Kansky, who was also the journal's first editor-in-chief. Over more than two decades of publishing, the journal and its editors experienced many challenges, as described in detail previously (1-6). In order to improve the quality and to establish its international recognition, several crucial steps were taken. The international visibility significantly increased after 2000, when the journal implemented an online open access policy in addition to the printed version. Since then, the entire content of Acta Dermatovenerol APA has been freely available at the journal's official website, http://www.acta-apa.org/. A major accomplishment occurred in 2005, when the journal achieved full indexing status in Index Medicus/Medline in addition to Biomedicina Slovenica and EMBASE/Excerpta Medica. Thus, from volume 14 onwards, the entire content of the journal has been included in PubMed, the most important bibliographic database for medical journals. In 2012, we significantly redesigned the journal's structure and appearance, in line with modern standards for a European journal. During 2014, we fundamentally redesigned the journal's website, including digitalization of all 699 contributions published since 1992, which are now freely available in the full text on the journal's official website (http://www.acta-apa.org/journals/actadermatovenerol-apa/archive). Recently, several steps were taken to further increase the journal's quality and to reach the next important goal in the journal's development: official indexing of the journal in the Thomson Scientific Science Citation Index. To foster this goal, we present here the most recent citation analysis (1992-2013), which accompanies two citation analyses published previously (4, 6).

Methods

The citation analysis comprised all bibliographical items published in Acta Dermatovenerol APA from 1992 to 2013. To optimize publication patterns according to the official Thomson Scientific Web of Science (WoS) publication types, the journal's original publication types were reclassified and divided into WoS citable and WoS noncitable items, using methodology described in detail previously (4, 6, 7). Citation analysis was performed manually and separately for each bibliographical item through a Cited Reference search of the WoS electronic database on 13 February 2015. Citations retrieved in this analysis were merged with citations obtained in two previous citation analyses published in 2009 and 2012, analyzing the time periods 1992-2008 and 1992-2011, respectively (4, 6).

For all 22 individual years (1992-2013), predicted impact factors were calculated. The predicted impact factor reflects the average number of citations of articles published, based on the number of citable items published and citations retrieved. Calculation of the predicted impact factor was done in a way to match official impact factors published annually in Thomson Scientific Journal Citation Reports. The journal impact factor in the year X is defined as the ratio of the number of citations received in year X by all published items in the journal in the years [X.sub.-1] and [X.sub.-2] (value A, Table 1) and the sum of published WoS citable items in the journal in the years [X.sub.-1] and [X.sub.-2] (value B, Table 1). For example, the predicted impact factor for 2013 is calculated as the ratio of the number of citations received in 2013 by all published items in the journal in 2012 and 2011 and the sum of published WoS citable items in the journal in 2012 and 2011.

Results

As summarized in Table 1, as of 13 February 2015, 699 bibliographical items were published in Acta Dermatovenerol APA from 1992 to 2013, including 435 articles, 148 reviews, 51 meeting summaries, 32 letters, 12 items about an individual, 11 book reviews, 8 editorials and 2 meeting abstracts. Among these, 582(83.3%) were considered WoS citable items and 117 (16.7%) as WoS noncitable items. A total of 1,360 SCI citations were retrieved from the WoS cited reference search and, as shown in Table 1, 1,250 (91.9%) were considered to be independent citations and 110 (8.1%) to be author self-citations.

Among 699 items published, 582 (83.3%) WoS citable items received a total of 1,333 out of 1,360 citations retrieved, or on average 2.29 citations per published item. A detailed analysis of the main citation indicators of bibliographical items published in the period 1992-2013 in comparison to two previous citation analysis performed in 2009 (period 1992-2008) and in 2012 (period 1992-2011) is shown in Table 2. Briefly, as of 13 February 2015, 298 (51.2%) WoS citable items published in our journal had received at least one SCI citation, 124 (21.3%) items had received four or more SCI citations, and 284 (48.8%) items are still without a single citation. As shown in Table 2, in comparison to the period 1992-2008, in the period 1992-2013 the proportion of WoS citable items that received at least one SCI citation increased from 34.3% to 51.2%, respectively, and the proportion of WoS citable items that received four or more SCI citations increased from 3.1% to 21.3%, respectively. Among 117 WoS noncitable items published in our journal, 11 (9.4%) items received at least one SCI citation, with a total of 27 citations received, or on average 0.23 citations per published item (Table 2).

Among all published bibliographical items, the most cited contribution was a review by Rozman and Bolta published in 2007 entitled "Use of platelet growth factors in treating wounds and soft-tissue injuries," with 68 citations received as of 13 February 2015.

As shown in detail in Figure 1, citation analysis showed a substantial increase in the predicted impact factor since 2006, with values above 0.5 since 2007. For the first time in the journal's history, a predicted impact factor value above 1.0 was recorded in 2013 (Fig. 1).

Discussion

Our citation analysis revealed that the majority of published items in our journal can be considered WoS citable items. As of 13 February 2015, WoS citable items received an average of 2.3 citations per item. In comparison to the data published earlier (4, 6), the proportion of WoS citable items remains similar through all three time periods evaluated (1992-2008, 1992-2011, and 1992-2013); however, WoS citable items received on average 3.4 more citations per item during 1992-2013 in comparison to the 1992-2008 period (2.29 vs. 0.67) and 2.4 more citations per item in comparison to the 1992-2011 period (2.29 vs. 0.97). A similar dynamic was also recorded for WoS noncitable items, with 0.05, 0.12, and 0.23 average citations per item during 1992-2008, 1992-2011, and 1992-2013, respectively (Table 2). These figures are a result of a recent dramatic increase in the total number of SCI citations, with almost half (49.6%) of all citations received from January 2012 onwards.

The proportion of author self-citations among all citations received is comparable to other leading research journals (8), with an encouraging decreasing trend of author self-citations from 18.2% during 1992-2008 to 8.1% during 1992-2013. Alongside author self-citation (9), journal self-citation is one of the most common ways in which journals artificially improve their impact factor (10-12). We are proud that for Acta Dermatovenerol APA only a few journal self-citations were identified in this analysis.

Regardless of the fact that the impact factor was primarily developed as a bibliographical tool (13, 14) it is still the most frequently used index for measuring the research quality of individuals, research groups, and institutions (15). Although it is often criticized as unrepresentative, misleading, and easily manipulated, a journal's impact factor remains of high importance for both authors and editors (7, 16-18). For the purpose of citation analysis of our journal, a very conservative and stringent approach for the "in house" calculation of the predicted impact factor was used (mainly for classification of WoS citable items), as described in detail previously (4, 6). Thus, we strongly believe that the predicted impact factors calculated in our analysis are a fairly good estimation (and most probably an underestimation) of the official impact factors that would be published in the annual Thomson Scientific Journal Citation Reports. As already described in our previous citation analysis (6), the free online access policy of our journal established in 2000 surprisingly did not have any measurable impact on the predicted impact factor. On the other hand, a substantial increase of the predicted impact factor occurred in 2006, immediately after achieving full indexing status in Index Medicus/Medline.

As shown in Figure 1, our analysis showed positive dynamics of the predicted impact factor of Acta Dermatovenerol APA, with values above 0.5 since 2007 and, for the first time in the journal's history, a value above 1.0 recorded in 2013. With its 2012 and 2013 predicted impact factors, Acta Dermatovenerol APA would be ranked 54th out of 59 and 45th out of 61 journals listed in the category "Dermatology" for 2012 and 2013, respectively, according to Thomson Scientific Journal Citation Report Science Edition. We sincerely hope that the recent significant quality improvements of our journal will soon also be acknowledged by Thomson Scientific by indexing our journal in the Science Citation Index and rewarded by the journal's first official impact factor.

doi: 10.15570/actaapa.2015.1

References

(1.) The Editors. Editorial 2006. Acta Dermatovenerol Alp Panonica Adriat. 2006; 15: 3-4.

(2.) Kansky A. Acta Dermatovenerologica Alpina, Pannonica et Adriatica: At the occasion of 10th anniversary. Acta Dermatovenerol Alp Panonica Adriat. 2002; 11: 133-6.

(3.) Poljak M. Editorial: Acta Dermatovenerologica Alpina, Pannonica et Adriatica and scientific misconduct. Acta Dermatovenerol Alp Panonica Adriat. 2009; 18: 91-3.

(4.) Poljak M, Ostrbenk A. Editorial: Citation analysis of Acta Dermatovenerologica Alpina, Pannonica et Adriatica 1992-2008. Acta Dermatovenerol Alp Panonica Adriat. 2009; 18:147-51.

(5.) Poljak M, Ziberna K, Ilovar S, Luzar B, Miljkovic J. Editorial: The 20th anniversary of Acta Dermatovenerologica Alpina, Pannonica et Adriatica: New clothes for a young lady. Acta Dermatovenerol Alp Panonica Adriat. 2012; 21:1.

(6.) Ostrbenk A, Skamperle M, Poljak M. Citation analysis of Acta Dermatovenerologica Alpina, Pannonica et Adriatica 1992-2011. Acta Dermatovenerol Alp Panonica Adriat. 2012; 21: 47-9.

(7.) Wu XF, Fu Q, Rousseau R. On indexing in the Web of Science and predicting journal impact factor. J Zhejiang Univ Sci B. 2008; 9: 582-90.

(8.) Falagas ME, Kavvadia P. "Eigenlob": self-citation in biomedical journals. FASEB J. 2006; 20: 1039-42.

(9.) Liu XL, Wang MY. Self-citation in Chinese biomedical journals. Learn Publ. 2010; 23: 93-100.

(10.) Kovacic N, Huic M, Ivanis A. Citation analysis of the Croatian Medical Journal: the first 15 years. Croat Med J. 2008; 49: 12-7.

(11.) Fassoulaki A, Papilas K, Paraskeva A, Patris K. Impact factor bias and proposed adjustments for its determination. Acta Anaesthesiol Scand. 2002;46:902-5.

(12.) Falagas ME, Alexiou VG. The top-ten in journal impact factor manipulation. Arch Immunol Ther Exp. 2008; 56: 223-6.

(13.) Garfield E. The history and meaning of the journal impact factor. JAMA. 2006; 295: 90-3.

(14.) Garfield E. Use of Journal Citation Reports and Journal Performance Indicators in measuring short and long term journal impact. Croat Med J. 2000; 41: 368-74.

(15.) Garfield E. Impact factors, and why they won't go away. Nature. 2001; 31: 522.

(16.) Brown H. How impact factors changed medical publishing--and science. BMJ. 2007; 334: 561-4.

(17.) Anon. Not-so-deep impact. Nature. 2005; 435: 1003-4.

(18.) Golubic R, Rudes M, Kovacic N, Marusic M, Marusic A. Calculating impact factor: how bibliographical classification of journal items affects the impact factor of large and small journals. Sci Eng Ethics. 2008; 14: 41-9.

Anja Ostrbenk [1], Mario Poljak [1] ([mail])

[1] institute of Microbiology and Immunology, Faculty of Medicine, University of Ljubljana, Zaloska 4, 1000 Ljubljana, Slovenia. ([mail]) Corresponding author: mario.poijak@mf.uni-ij.si

Table 1 | Results of citation analysis of bibliographical items
published in Acta Dermatovenerologica Alpine, Pannonica
et Adriatica 1992-2013.

Publication   Total number    Total number    Total number
year          of published   of WoS citable   of received
                 items           items         citations

1992               28              20              20
1993               30              24              4
1994               36              32              35
1995               41              36              11
1996               39              30              23
1997               26              22              1
1998               29              25              12
1999               32              25              18
2000               30              22              16
2001               32              26              29
2002               25              23              20
2003               29              24              17
2004               29              22              37
2005               30              26             180
2006               36              27             144
2007               38              31             232
2008               34              31             194
2009               40              34             143
2010               37              34              87
2011               33              31             101
2012               23              20              24
2013               20              17              12
Total             699             582            1,360

Publication     Total number of       A value for      B value for
year          received independent   IF calculation   IF calculation
                   citations

1992                   17                  /                /
1993                   3                   /                /
1994                   31                  3                44
1995                   9                   3                56
1996                   17                  2                68
1997                   1                   2                66
1998                   12                  1                52
1999                   14                  0                47
2000                   15                  5                50
2001                   16                  2                47
2002                   14                  2                48
2003                   17                  6                49
2004                   30                  2                47
2005                  167                  2                46
2006                  138                  17               48
2007                  218                  30               53
2008                  189                  29               58
2009                  133                  55               62
2010                   84                  49               65
2011                   91                  42               68
2012                   23                  33               65
2013                   11                  52               51
Total                1,250                 /                /

Publication   Predicted
year          IF (A/B)

1992              /
1993              /
1994            0.068
1995            0.054
1996            0.029
1997            0.030
1998            0.019
1999            0.000
2000            0.100
2001            0.043
2002            0.042
2003            0.122
2004            0.043
2005            0.043
2006            0.354
2007            0.566
2008            0.500
2009            0.887
2010            0.754
2011            0.618
2012            0.508
2013            1.020
Total             /

Table 2 | Main citation indicators of bibliographical items
published in Acta Dermatovenerologica Alpine, Pannonica
etAdriatica over three time periods.

Time span included in the analysis                  1992-2008
(date of citation analysis performed)            (1 August 2009)

Bibliographical                                        544
items published     WoS citable items              446 (82.0%)
                    WoS noncitable items           98 (18.0%)

Total number                                           303
of SCI citations    Independent SCI citations      248 (81.8%)
                    Author self-citations          55 (18.2%)

Average citations
per item for        WoS citable items            0.67 (298/446)
                    WoS noncitable items           0.05 (5/98)

WoS citable items
                    At least one SCI citation      153 (34.3%)
                    Four or more SCI citations      14 (3.1%)
                    Without SCI citation           293 (65.7%)

WoS noncitable
items               At least one SCI citation       3 (3.1%)
                    Without SCI citation           95 (96.9%)

Most cited item                                      Article
                                                 Poljak M et al.
                                                 2005;14:147-52.
                                                  13 citations

Time span included in the analysis                    1992-2011
(date of citation analysis performed)            (27 November 2012)

Bibliographical                                          654
items published     WoS citable items                545 (83.4%)
                    WoS noncitable items             109 (16.6%)

Total number                                             544
of SCI citations    Independent SCI citations        483 (88.8%)
                    Author self-citations            61 (11.2%)

Average citations
per item for        WoS citable items              0.97 (531/545)
                    WoS noncitable items            0.12 (13/109)

WoS citable items
                    At least one SCI citation        221 (40.6%)
                    Four or more SCI citations        36 (6.6%)
                    Without SCI citation             324 (59.4%)

WoS noncitable
items               At least one SCI citation         7 (6.4%)
                    Without SCI citation             102 (93.6%)

Most cited item                                        Review
                                                 Bostjancic E et al.
                                                   2008;17:95-102.
                                                    21 citations

Time span included in the analysis                   1992-2013
(date of citation analysis performed)            (13 February 2015)

Bibliographical                                         699
items published     WoS citable items               582 (83.3%)
                    WoS noncitable items            117 (16.7%)

Total number                                           1,360
of SCI citations    Independent SCI citations      1,250 (91.9%)
                    Author self-citations            110 (8.1%)

Average citations
per item for        WoS citable items             2.29 (1,333/582)
                    WoS noncitable items           0.23 (27/117)

WoS citable items
                    At least one SCI citation       298 (51.2%)
                    Four or more SCI citations      124 (21.3%)
                    Without SCI citation            284 (48.8%)

WoS noncitable
items               At least one SCI citation        11 (9.4%)
                    Without SCI citation            106 (90.6%)

Most cited item                                        Review
                                                  Rozman P et al.
                                                  2007;16:156-65.
                                                    68 citations
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Author:Ostrbenk, Anja; Poljak, Mario
Publication:Acta Dermatovenerologica Alpina, Pannonica et Adriatica
Date:Jan 1, 2015
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