2022 Journal Performance Data for: BMJ Open

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2022 Journal Performance Data for:

BMJ Open

Open Access since 2011

ISSN EISSN

2044-6055 2044-6055

JCR ABBREVIATION ISO ABBREVIATION

BMJ OPEN BMJ Open

Journal Information

EDITION CATEGORY

Science Citation Index

Expanded (SCIE) MEDICINE, GENERAL &

INTERNAL - SCIE

LANGUAGES REGION 1ST ELECTRONIC JCR YEAR

English ENGLAND 2012

Publisher Information

PUBLISHER ADDRESS PUBLICATION FREQUENCY

BMJ PUBLISHING GROUP BRITISH MED ASSOC HOUSE, TAVISTOCK SQUARE, LONDON WC1H 9JR, ENGLAND

12 issues/year

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Journal's Performance

Journal Impact Factor

The Journal Impact Factor (JIF) is a journal-level metric calculated from data indexed in the Web of Science Core Collection. It should be used with careful attention to the many factors that influence citation rates, such as the volume of publication and citations characteristics of the subject area and type of journal. The Journal Impact Factor can complement expert opinion and informed peer review.

In the case of academic evaluation for tenure, it is inappropriate to use a journal-level metric as a proxy measure for individual researchers, institutions, or articles. Learn more

2022 JOURNAL IMPACT FACTOR 2022 JOURNAL IMPACT FACTOR WITHOUT SELF CITATIONS

2.9 2.8

Journal Impact Factor Trend 2022

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Journal Impact Factor is calculated using the following metrics Citations in 2022 to items published in 2020 (11,911) -

2021 (11,262) 23,173

= = 2.9

Number of citable items in 2020 (3,571) + 2021 (4,382) 7,953

Journal Impact Factor without self cites is calculated using the following metrics Citations in 2022 to items published in 2020 (11,911) +

2021 (11,262) - Self Citations in 2022 to items published

in 2020 (599) + 2021 (554) 23,173 -

1,153

= = 2.8

Number of citable items in 2020 (3,571) + 2021 (4,382) 7,953

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Journal Impact Factor Contributing Items

Citable Items (7,953)

TITLE CITATION COUNT

Impact of COVID-19 pandemic on utilisation of healthcare services: a systematic review

Authors: Moynihan, Ray;Johansson, Minna;Lang, Eddy;Duggan, Anne;Scott, Ian;Albarqouni, Loai;Sanders, Sharon;Michaleff, Zoe A.;Scott, Anna Mae;Clark, Justin; et al.

Volume: 11

Accession number: WOS:000631126600008 Document Type: Article

193

Perceptions of medical students towards online teaching during the COVID-19 pandemic: a national cross-sectional survey of 2721 UK medical students Authors: Dost, Samiullah;Hossain, Aleena;Shehab, Mai;Abdelwahed, Aida;Al- Nusair, Lana

Volume: 10

175

Incubation period of COVID-19: a rapid systematic review and meta-analysis of observational research

Authors: McAloon, Conor;McEvoy, David;Wall, Patrick;Green, Martin;O'Grady, Luke;More, Simon J.;Collins, Aine;Hunt, Kevin;Barber, Ann;Byrne, Andrew W.; et al.

Volume: 10

Accession number: WOS:000564351500102 Document Type: Review

104

Multiorgan impairment in low-risk individuals with post-COVID-19 syndrome: a prospective, community-based study

Authors: Dennis, Andrea;Hishmeh, Lyth;Attree, Emily;Heightman,

Melissa;Banerjee, Rajarshi;Banerjee, Amitava;Wamil, Malgorzata;Alberts, Johann;Oben, Jude;Cuthbertson, Daniel J.; et al.

Volume: 11

102

Demographic risk factors for COVID-19 infection, severity, ICU admission and death: a meta-analysis of 59 studies

Authors: Pijls, Bart G.;Zalpuri, Saurabh;Zeegers, Maurice P.;Jolani, Shahab;Atherley, Anique;Derckx, Raissa T.;Dijkstra, Janna I. R.;Franssen, Gregor H. L.;Hendriks, Stevie;Richters, Anke; et al.

Volume: 11

97

Showing 1-5 rows of 7,953 total (use export in the relevant section to download the full table)

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Journal Impact Factor Contributing Items

Citing Sources (4,277)

SOURCE NAME COUNT

BMJ OPEN 1,153

INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC

HEALTH 1,009

PLOS ONE 705

FRONTIERS IN PUBLIC HEALTH 434

BMC PUBLIC HEALTH 263

BMC HEALTH SERVICES RESEARCH 247

SCIENTIFIC REPORTS 239

NUTRIENTS 185

JOURNAL OF CLINICAL MEDICINE 184

HEALTHCARE 173

FRONTIERS IN PSYCHIATRY 154

FRONTIERS IN MEDICINE 135

FRONTIERS IN PSYCHOLOGY 125

BMC GERIATRICS 120

CUREUS JOURNAL OF MEDICAL SCIENCE 104

VACCINES 100

CANCERS 99

JAMA NETWORK OPEN 98

TRIALS 90

JOURNAL OF MEDICAL INTERNET RESEARCH 80

Showing 1-20 rows of 4,277 total (use export in the relevant section to download the full table)

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Journal Citation Indicator (JCI) 0.72

The Journal Citation Indicator (JCI) is the average Category Normalized Citation Impact (CNCI) of citable items (articles & reviews) published by a journal over a recent three year period. The average JCI in a category is 1. Journals with a JCI of 1.5 have 50% more citation impact than the average in that category. It may be used alongside other metrics to help you evaluate journals. Learn more

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Total Citations 80,581

The total number of times that a journal has been cited by all journals included in the database in the JCR year. Citations to journals listed in JCR are compiled annually from the JCR years combined database, regardless of which JCR edition lists the journal.

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Citation Distribution

The Citation Distribution shows the frequency with which items published in the year or two years prior were cited in the JCR data year (i.e., the component of the calculation of the JIF). The graph has similar functionality as the JIF Trend graph, including hover-over data descriptions for each data point, and an interactive legend where each data element's legend can be used as a toggle. You can view Articles, Reviews, or Non-Citable (other) items to the JIF numerator. Learn more

ARTICLE CITATION MEDIAN REVIEW CITATION MEDIAN UNLINKED CITATIONS

2 1 565

0 times cited

ARTICLES REVIEWS OTHER

1,637 409 73

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Open Access (OA)

The data included in this tile summarizes the items published in the journal in the JCR data year and in the previous two years. This three-year set of published items is used to provide descriptive analysis of the content and community of the journal.Learn more

Items

TOTAL CITABLE % OF CITABLE OA

13,185 98.23%

CITABLE

GOLD OPEN ACCESS

12,951 / 97.35%

SUBSCRIPTION OR BRONZE

234 / 1.76%

NON-CITABLE

OTHER (NON-CITABLE ITEMS)

119 / 0.89%

Citations*

TOTAL CITABLE % OF CITABLE OA

24,885 99.26%

CITABLE

GOLD OPEN ACCESS

24,701 / 96.80%

SUBSCRIPTION OR BRONZE

184 / 0.72%

NON-CITABLE

OTHER (NON-CITABLE ITEMS)

1 / 0.00%

UNLINKED CITATIONS

631 / 2.47%

* Citations in 2022 to items published in (2020-2022)

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Rank by Journal Impact factor

Journals within a category are sorted in descending order by Journal Impact Factor (JIF) resulting in the Category Ranking below. A separate rank is shown for each category in which the journal is listed in JCR. Data for the most recent year is presented at the top of the list, with other years shown in reverse chronological order. Learn more

EDITION

Science Citation Index Expanded (SCIE)

Rank by Journal Citation Indicator (JCI)

Journals within a category are sorted in descending order by Journal Citation Indicator (JCI) resulting in the Category Ranking below. A separate rank is shown for each category in which the journal is listed in JCR. Data for the most recent year is presented at the top of the list, with other years shown in reverse chronological order.Learn more

Citation network

Cited Half-life

4.0 years

The Cited Half-Life is the median age of the items in this journal that were cited in the JCR year. Half of a journal's cited items were published more recently than the cited half-life.

TOTAL NUMBER OF CITES NON-SELF CITATIONS SELF CITATIONS

80,581 77,069 3,512

# OF CITES FROM

2022 CUMULATIVE

% # OF CITING SOURCES 80,581 citations 100.00% 7,028 sources 2,344 citations 2.91% 946 sources 11,262 citations 16.88% 2,935 sources 11,911 citations 31.67% 3,194 sources 14,333 citations 49.45% 3,535 sources 9,131 citations 60.78% 2,884 sources 9,781 citations 72.92% 2,987 sources 8,042 citations 82.90% 2,703 sources 4,961 citations 89.06% 2,002 sources 3,646 citations 93.58% 1,649 sources 3,105 citations 97.44% 1,559 sources Previous years:

2,065 citations

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Citing titles in all years

BMJ Open

SOURCE NAME COUNT

All Others 2,023

1 BMJ Open 3,512

2 PLoS One 2,154

3 Frontiers in Public Health 1,212

4 BMC PUBLIC HEALTH 818

5 BMC HEALTH SERVICES RESEARCH 773

6 Scientific Reports 740

7 Nutrients 693

8 Journal of Clinical Medicine 608

9 Healthcare 508

10 Frontiers in Psychiatry 433

11 Cureus Journal of Medical Science 394

12 Frontiers in Medicine 389

13 BMC Geriatrics 377

14 Frontiers in Psychology 372

15 BMC Pregnancy and Childbirth 330

16 Trials 307

17 JAMA Network Open 302

18 JOURNAL OF MEDICAL INTERNET RESEARCH 290

19 Cancers 272

20 Frontiers in Pharmacology 265

Showing 1 - 20 rows of 4899 total (use export in the relevant section to download the full table)

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Citing Half-life

6.6 years

The Citing Half-Life is the median age of items in other publications cited by this journal in the JCR year.

TOTAL NUMBER OF CITES NON-SELF CITATIONS SELF CITATIONS

225,637 222,125 3,512

# OF CITES FROM

2022 CUMULATIVE

% # OF CITED SOURCES 225,637 citations 100.00% 36,530 sources 3,411 citations 1.51% 1,707 sources 19,231 citations 10.03% 6,058 sources 28,185 citations 22.53% 7,683 sources 18,527 citations 30.74% 5,722 sources 17,991 citations 38.71% 5,389 sources 16,369 citations 45.96% 5,111 sources 14,286 citations 52.30% 4,422 sources 13,122 citations 58.11% 4,083 sources 10,827 citations 62.91% 3,631 sources 10,231 citations 67.44% 3,313 sources

Previous years:

73,457 citations

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Cited titles in all years

BMJ Open

SOURCE NAME COUNT

All Others 26,405

1 BMJ-British Medical Journal 3,982

2 PLoS One 3,934

3 LANCET 3,811

4 BMJ Open 3,512

5 NEW ENGLAND JOURNAL OF MEDICINE 2,215

6 JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION 2,076

7 BMC PUBLIC HEALTH 1,690

8 Cochrane Database of Systematic Reviews 1,344

9 ANNALS OF INTERNAL MEDICINE 1,293

10 JOURNAL OF CLINICAL EPIDEMIOLOGY 1,189

11 BMC HEALTH SERVICES RESEARCH 1,173

12 Implementation Science 891

13 CIRCULATION 845

14 SOCIAL SCIENCE & MEDICINE 830

15 PLOS MEDICINE 823

16 PEDIATRICS 759

17 BMC Medical Research Methodology 729

18 JOURNAL OF MEDICAL INTERNET RESEARCH 681

19 JOURNAL OF CLINICAL ONCOLOGY 629

20 BMC Pregnancy and Childbirth 625

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Journal Citation Relationships

Cited Data

Top 20 journals citing BMJ OPEN by number of citations

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Citing Data

Top 20 journals cited by BMJ OPEN by number of citations

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Content metrics

Source data

This tile shows the breakdown of document types published by the journal. Citable Items are Articles and Reviews. For the purposes of calculating JIF, a JCR year considers the publications of that

journal in the two prior years. Learn more

5,232 total citable items

ARTICLES REVIEWS COMBINED (C) OTHER DOCUMENT TYPES (O)

PERCENTAGE

NUMBER IN JCR

YEAR 2022 (A) 4,231 1,001 5,232 45 99%

NUMBER OF

REFERENCES (B) 176,830 48,742 225,572 65 100%

RATIO (B/A) 41.8 48.7 43.1 1.4

Average JIF Percentile

The Average Journal Impact Factor Percentile takes the sum of the JIF Percentile rank for each category under consideration, then calculates the average of those values. Learn more

ALL CATEGORIES AVERAGE

53.0

EDITION

Science Citation Index Expanded

53.0

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Contributions by Organizations

Organizations that have contributed the most papers to the journal in the most recent three-year period. Learn more

RANK ORGANIZATION COUNT

1 UNIVERSITY OF LONDON 1211

2 UNIVERSITY OF TORONTO 498

3 UNIVERSITY OF OXFORD 470

4 UNIVERSITY OF SYDNEY 395

5 HARVARD UNIVERSITY 376

6 UNIVERSITY OF MELBOURNE 314

7 IMPERIAL COLLEGE LONDON 310

8 KAROLINSKA INSTITUTET 290

Contributions by country/region

Countries or Regions that have contributed the most papers to the journal in the most recent three- year period. Learn more

RANK COUNTRY/REGION COUNT

1 England 3312

2 USA 2301

3 CHINA MAINLAND 1828

4 Australia 1581

5 Canada 1333

6 Netherlands 904

7 GERMANY (FED REP GER) 759

8 Sweden 607

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Additional metrics

Eigenfactor score 0.15660

The Eigenfactor Score is a reflection of the density of the network of citations around the journal using 5 years of cited content as cited by the Current Year. It considers both the number of citations and the source of those citations, so that highly cited sources will influence the network more than less cited sources. The Eigenfactor calculation does not include journal self-citations. Learn more

Normalized Eigenfactor 34.08273

The Normalized Eigenfactor Score is the Eigenfactor score normalized, by rescaling the total number of journals in the JCR each year, so that the average journal has a score of 1. Journals can then be compared and influence measured by their score relative to 1. Learn more

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Article influence score 1.040

The Article Influence Score normalizes the Eigenfactor Score according to the cumulative size of the cited journal across the prior five years. The mean Article Influence Score for each article is 1.00. A score greater than 1.00 indicates that each article in the journal has above-average influence. Learn more

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5 year Impact Factor 3.3

The 5-year Impact Factor is the average number of times articles from the journal published in the past five years have been cited in the JCR year. It is calculated by dividing the number of citations in the JCR year by the total number of articles published in the five previous years.

5 year Impact Factor calculation

Citations in 2022 to items published in [2017-2021]

(56,418) 56,418

= = 3.3

Number of citable items in [2017-2021] (17,141) 17,141

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Immediacy Index 0.4

The Immediacy Index is the count of citations in the current year to the journal that reference content in this same year. Journals that have a consistently high Immediacy Index attract citations rapidly.

Learn more

Immediacy Index calculation

Cites in 2022 to items published in 2022 2,344

2,344 / 5,232 = 0.4 Number of items published in 2022 5,232