Scimago Journal & Country Rank


Country United States  - SIR icon SIR Ranking of United States
H Index
Subject Area and CategoryMedicine
Neurology (clinical)
Physiology (medical)
PublisherOxford University Press
Publication typeJournals
Scope SLEEP is the official publication of the Associated Professional Sleep Societies, LLC (APSS) a joint venture of the American Academy of Sleep Medicine and the Sleep Research Society. Primary readers are scientists engaged in the study of sleep and its disorders, and clinicians practicing sleep disorders medicine.


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The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

Neurology (clinical)1999Q1
Neurology (clinical)2000Q1
Neurology (clinical)2001Q1
Neurology (clinical)2002Q1
Neurology (clinical)2003Q1
Neurology (clinical)2004Q1
Neurology (clinical)2005Q1
Neurology (clinical)2006Q1
Neurology (clinical)2007Q1
Neurology (clinical)2008Q1
Neurology (clinical)2009Q1
Neurology (clinical)2010Q1
Neurology (clinical)2011Q1
Neurology (clinical)2012Q1
Neurology (clinical)2013Q1
Neurology (clinical)2014Q1
Neurology (clinical)2015Q1
Neurology (clinical)2016Q1
Neurology (clinical)2017Q1
Neurology (clinical)2018Q1
Physiology (medical)1999Q1
Physiology (medical)2000Q1
Physiology (medical)2001Q1
Physiology (medical)2002Q1
Physiology (medical)2003Q2
Physiology (medical)2004Q1
Physiology (medical)2005Q1
Physiology (medical)2006Q1
Physiology (medical)2007Q1
Physiology (medical)2008Q1
Physiology (medical)2009Q1
Physiology (medical)2010Q1
Physiology (medical)2011Q1
Physiology (medical)2012Q1
Physiology (medical)2013Q1
Physiology (medical)2014Q1
Physiology (medical)2015Q1
Physiology (medical)2016Q1
Physiology (medical)2017Q1
Physiology (medical)2018Q1

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per documentYearValue
Cites / Doc. (4 years)19992.538
Cites / Doc. (4 years)20003.431
Cites / Doc. (4 years)20013.826
Cites / Doc. (4 years)20023.739
Cites / Doc. (4 years)20034.032
Cites / Doc. (4 years)20044.132
Cites / Doc. (4 years)20055.545
Cites / Doc. (4 years)20065.701
Cites / Doc. (4 years)20075.348
Cites / Doc. (4 years)20086.025
Cites / Doc. (4 years)20096.440
Cites / Doc. (4 years)20107.864
Cites / Doc. (4 years)20117.510
Cites / Doc. (4 years)20127.739
Cites / Doc. (4 years)20136.960
Cites / Doc. (4 years)20146.754
Cites / Doc. (4 years)20156.257
Cites / Doc. (4 years)20165.775
Cites / Doc. (4 years)20175.923
Cites / Doc. (4 years)20185.338
Cites / Doc. (3 years)19992.538
Cites / Doc. (3 years)20003.491
Cites / Doc. (3 years)20013.557
Cites / Doc. (3 years)20023.812
Cites / Doc. (3 years)20033.222
Cites / Doc. (3 years)20044.284
Cites / Doc. (3 years)20055.536
Cites / Doc. (3 years)20065.804
Cites / Doc. (3 years)20075.227
Cites / Doc. (3 years)20085.763
Cites / Doc. (3 years)20096.212
Cites / Doc. (3 years)20107.720
Cites / Doc. (3 years)20116.979
Cites / Doc. (3 years)20127.073
Cites / Doc. (3 years)20136.560
Cites / Doc. (3 years)20146.220
Cites / Doc. (3 years)20156.016
Cites / Doc. (3 years)20165.478
Cites / Doc. (3 years)20175.745
Cites / Doc. (3 years)20184.946
Cites / Doc. (2 years)19992.374
Cites / Doc. (2 years)20002.980
Cites / Doc. (2 years)20013.564
Cites / Doc. (2 years)20022.828
Cites / Doc. (2 years)20033.016
Cites / Doc. (2 years)20044.283
Cites / Doc. (2 years)20055.405
Cites / Doc. (2 years)20065.518
Cites / Doc. (2 years)20074.751
Cites / Doc. (2 years)20085.294
Cites / Doc. (2 years)20095.939
Cites / Doc. (2 years)20106.815
Cites / Doc. (2 years)20116.379
Cites / Doc. (2 years)20126.285
Cites / Doc. (2 years)20135.818
Cites / Doc. (2 years)20145.466
Cites / Doc. (2 years)20155.406
Cites / Doc. (2 years)20165.202
Cites / Doc. (2 years)20175.167
Cites / Doc. (2 years)20184.302
Total Cites 

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

Self Cites1999111
Self Cites2000138
Self Cites200192
Self Cites2002115
Self Cites200392
Self Cites2004235
Self Cites2005237
Self Cites2006288
Self Cites2007258
Self Cites2008153
Self Cites2009267
Self Cites2010279
Self Cites2011280
Self Cites2012246
Self Cites2013323
Self Cites2014254
Self Cites2015250
Self Cites2016286
Self Cites2017218
Self Cites2018204
Total Cites19991023
Total Cites20001173
Total Cites20011188
Total Cites20021300
Total Cites20031044
Total Cites20041358
Total Cites20052220
Total Cites20062641
Total Cites20072551
Total Cites20082749
Total Cites20092932
Total Cites20103644
Total Cites20113357
Total Cites20123678
Total Cites20133411
Total Cites20143446
Total Cites20153405
Total Cites20163303
Total Cites20173533
Total Cites20183225
External Cites per Doc 
Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

External Cites per document19992.263
External Cites per document20003.080
External Cites per document20013.281
External Cites per document20023.475
External Cites per document20032.938
External Cites per document20043.543
External Cites per document20054.945
External Cites per document20065.171
External Cites per document20074.699
External Cites per document20085.442
External Cites per document20095.646
External Cites per document20107.129
External Cites per document20116.397
External Cites per document20126.600
External Cites per document20135.938
External Cites per document20145.762
External Cites per document20155.574
External Cites per document20165.003
External Cites per document20175.390
External Cites per document20184.633
Cites per document19992.538
Cites per document20003.491
Cites per document20013.557
Cites per document20023.812
Cites per document20033.222
Cites per document20044.284
Cites per document20055.536
Cites per document20065.804
Cites per document20075.227
Cites per document20085.763
Cites per document20096.212
Cites per document20107.720
Cites per document20116.979
Cites per document20127.073
Cites per document20136.560
Cites per document20146.220
Cites per document20156.016
Cites per document20165.478
Cites per document20175.745
Cites per document20184.946
% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

YearInternational Collaboration
Citable documents 
Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

Non-citable documents199929
Non-citable documents200033
Non-citable documents200133
Non-citable documents200230
Non-citable documents200321
Non-citable documents200439
Non-citable documents200577
Non-citable documents2006147
Non-citable documents2007163
Non-citable documents2008142
Non-citable documents200998
Non-citable documents201092
Non-citable documents2011122
Non-citable documents2012144
Non-citable documents2013171
Non-citable documents2014185
Non-citable documents2015175
Non-citable documents2016159
Non-citable documents2017124
Non-citable documents2018101
Citable documents1999403
Citable documents2000336
Citable documents2001334
Citable documents2002341
Citable documents2003324
Citable documents2004317
Citable documents2005401
Citable documents2006455
Citable documents2007488
Citable documents2008477
Citable documents2009472
Citable documents2010472
Citable documents2011481
Citable documents2012520
Citable documents2013520
Citable documents2014554
Citable documents2015566
Citable documents2016603
Citable documents2017615
Citable documents2018652
Cited documents 
Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

Uncited documents1999132
Uncited documents2000100
Uncited documents200198
Uncited documents200286
Uncited documents200378
Uncited documents200464
Uncited documents200592
Uncited documents2006144
Uncited documents2007162
Uncited documents2008148
Uncited documents200998
Uncited documents201080
Uncited documents201199
Uncited documents2012101
Uncited documents2013135
Uncited documents2014168
Uncited documents2015155
Uncited documents2016154
Uncited documents2017113
Uncited documents2018113
Cited documents1999300
Cited documents2000269
Cited documents2001269
Cited documents2002285
Cited documents2003267
Cited documents2004292
Cited documents2005386
Cited documents2006458
Cited documents2007489
Cited documents2008471
Cited documents2009472
Cited documents2010484
Cited documents2011504
Cited documents2012563
Cited documents2013556
Cited documents2014571
Cited documents2015586
Cited documents2016608
Cited documents2017626
Cited documents2018640
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