Journal profile · Clinical Neurology
SLEEP
ISSN 0161-8105 · eISSN 1550-9109 · Oxford University Press · UNITED STATES · Monthly · Founded 1978
SLEEP: CAS Zone 2 · Medicine (2025 upgraded edition); impact factor 6.54; hybrid open access; APC about USD 4,388; median 115 days to acceptance (81 articles, last 24 months); community-reported acceptance: fairly hard; 1,942 articles in 2025; indexed in SCIE and Scopus.
Scope
Aims, scope and focus
SLEEP is published by Oxford University Press and is in Zone 2 of Medicine in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Sleep and related disorders, Sleep and Wakefulness Research and Obstructive Sleep Apnea Research, together about 60.2% of its articles. (generated from OpenAlex topic counts and CAS ranking data)
SLEEP® publishes findings from studies conducted at any level of analysis, including: Genes Molecules Cells Physiology Neural systems and circuits Behavior and cognition Self-report SLEEP® publishes articles that use a wide variety of scientific approaches and address a broad range of topics. These may include, but are not limited to: Basic and neuroscience studies of sleep and circadian mechanisms In vitro and animal models of sleep, circadian rhythms, and human disorders Pre-clinical human investigations, including the measurement and manipulation of sleep and circadian rhythms Studies in clinical or population samples. These may address factors influencing sleep and circadian rhythms (e.g., development and aging, and social and environmental influences) and relationships between sleep, circadian rhythms, health, and disease Clinical trials, epidemiology studies, implementation, and dissemination research
From the journal's Aims & Scope
Research area (LetPub): Clinical Neurology
Editor-in-chief Allan I. PackPublisher website
Main research topics OpenAlex counts of recent articles; shares are approximate
- Sleep and related disordersPsychology26.7%
- Sleep and Wakefulness ResearchNeuroscience18.4%
- Obstructive Sleep Apnea ResearchMedicine15.2%
- Sleep and Work-Related FatiguePsychology8.3%
- Restless Legs Syndrome ResearchMedicine4.7%
- Neuroscience of respiration and sleepNeuroscience4.5%
- Circadian rhythm and melatoninNeuroscience3.7%
- EEG and Brain-Computer InterfacesNeuroscience2.1%
Rankings & indexing
CAS ranking and database indexing
CAS Journal Ranking
CAS Journal Ranking, upgraded edition (March 2025)Medicine Zone 2
| Level | Category | Zone |
|---|---|---|
| Major | Medicine | Zone 2 |
| Minor | Clinical Neurology | Zone 2 |
| Minor | Neurosciences | Zone 2 |
Top journal: noReview journal: no
CAS Xinrui Journal Ranking (March 2026)Medicine Zone 2
| Level | Category | Zone |
|---|---|---|
| Major | Medicine | Zone 2 |
| Minor | Clinical Neurology | Zone 2 |
| Minor | Neurosciences | Zone 2 |
Top journal: yesReview journal: not marked
CAS Journal Ranking, previous upgraded edition (December 2023)Medicine Zone 2
| Level | Category | Zone |
|---|---|---|
| Major | Medicine | Zone 2 |
| Minor | Clinical Neurology | Zone 2 |
| Minor | Neurosciences | Zone 2 |
Top journal: noReview journal: no
Database indexing
SCIEScopusLetPub
International journal early-warning lists: not listed in any editionLetPub
Editions, and major and minor categories, are shown separately and never merged into one zone; check which edition your institution uses before you submit or report.
Metrics
Impact metrics and publication volume
Impact
- Impact factor
- 6.54LetPub ·
- Impact factor (publisher) 2025
- 6.6Publisher website ·
- 5-year impact factor (publisher) 2025
- 9.8Publisher website ·
- CiteScore 2026-06
- 9.8LetPub ·
- CiteScore (publisher) 2025
- 9.8Publisher website ·
- SJR 2026-06
- 1.67LetPub ·
- SNIP 2026-06
- 1.7LetPub ·
- h-index
- 184LetPub ·
- h-index
- 309OpenAlex ·
- i10-index
- 6,128OpenAlex ·
- 2-year mean citedness
- 0.81OpenAlex ·
- Self-citation rate
- 8.6%LetPub ·
- Share of gold OA articles
- 35.09%LetPub ·
Volume
- Articles per year
- 241LetPub ·
Articles by year OpenAlex count · 20,235 in total · the current year is incomplete
| Year | Articles | Open access | Citations |
|---|---|---|---|
| 2026 | 1,650 | 148 | 164 |
| 2025 | 1,942 | 1,766 | 1,454 |
| 2024 | 1,549 | 780 | 2,566 |
| 2023 | 1,382 | 1,304 | 4,836 |
| 2022 | 1,175 | 1,121 | 5,647 |
| 2021 | 1,175 | 587 | 9,162 |
Sources count differently and were observed at different times, so each source's own value is kept; "publisher" marks figures from the journal's website.
Review & acceptance
Review time and acceptance
Review time from article dates manuscript dates registered with PubMed · to
115 daysMedian, submission to acceptance · P25–P75 53 days – 170 days
- Acceptance to online
- median 8 days (35 articles)
- Submission to online
- median 150 days
- Sample
- 81 articles with submission and acceptance dates (859 in the window); the latest was accepted on
Only articles that were accepted and published are counted, not the time spent on rejected manuscripts, so this usually runs longer than a publisher's "time to first decision".
Other sources
- Average review time (community reports)
- 3–8 weeksLetPub ·
- Average acceptance (community reports)
- Fairly hardLetPub ·
- Peer review
- Single anonymous peer reviewPublisher website
Community reports come from authors' own submissions (confidence 0.5) and are not a promise from the journal; for publisher figures, the journal's own definitions apply.
Fees & open access
APC and open-access policy
Hybrid open accessLetPub
A subscription journal in which authors can pay to publish their article open access.
| Source | APC | Fee waiver | License | Observed |
|---|---|---|---|---|
| OpenAlex | USD 4,388 | — | — | |
| Publisher website | No APC | — | — |
A hybrid journal charges the APC only when the author chooses open access; publishing under the subscription model is usually free.
Other charges and waivers (author guidelines)
- Other fees
- Charged; see the journal's website for the amount
- Submission fee
- USD 50
The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.
Submission
Article types and submission policies (journal website)
What to prepare5 items from the author guidelines
- Abstract
- ≤ 250 words
- Keywords
- 3–10
- Reference style
- AMA
- Templates
- Word
- Suggested reviewers
- Optional
Article types accepted12, with length limits
- editoriale of the journal as the target article. Editorials have a maximum length of 1,200 words plus as many references as needed and may include one figurmain text ≤ 1,200 words
- editorialsEditorials may be commentaries on newly published articles that are solicited by the Editors.Length not stated
- letterfull manuscript. As a guide, a Research Letter should have 1,200 words, 10 references, one figure or table, and no abstract. Supplmain text ≤ 1,200 words
- letters to the editorThe Journal welcomes Letters to the Editor from readers offering relevant comments, querying authors, and providing objective and scholarly criticism of recentl…Length not stated
- letters to the editor and responsesThe Journal welcomes Letters to the Editor from readers offering relevant comments, querying authors, and providing objective and scholarly criticism of recentl…Length not stated
- original articleOriginal Articles present original research findings in the fields of sleep/circadian medicine and sleep/circadian science, broadly defined. There is no minimum…Length not stated
- original articlesOriginal Articles present original research findings in the fields of sleep/circadian medicine and sleep/circadian science, broadly defined.Length not stated
- perspectivePro-Con debate in one single document. Perspectives should not exceed 4,000 words in length and 50 references. This is intended as a guide; Pmain text ≤ 4,000 words · references ≤ 50
- perspectivesA Perspective is a fact-based opinion article on a topic of current interest.Length not stated
- research lettersResearch Letters are intended to provide authors the opportunity to publish short reports of their research findings.Length not stated
- review articleReview articles are critical, timely and balanced evaluations of material that has already been published. They should be novel, not repeat previously published…Length not stated
- review articlesReview articles are critical, timely and balanced evaluations of material that has already been published.Length not stated
Policy excerpts from the journal's websiteAuthorship, Conflicts of interest, Data availability, Publication ethics, Open access, Peer review, Preprints, Self-archiving
- Authorship Authorship
Authorship is limited to those who have made a significant contribution to the design and execution of the work described. Any contributors whose participation does not meet the criteria for authorship should be acknowledged but not listed as an author. For a detailed definition of authorship, please see the International Committee of Medical Journal Editors (ICMJE) definitions of authors and cont…
Source ↗Publisher website ·- Conflicts of interest Disclosure of potential conflicts of interest
Authors The Journal requires all authors to disclose any potential conflict of interest at the point of submission. It is the responsibility of the corresponding author to ensure that conflicts of interest of all authors are declared to the Journal. A conflict of interest exists when the position, activities, or relationships of an individual, whether direct or indirect, financial or non-financial…
Source ↗Publisher website ·- Data availability Availability of data and materials
Data sharing encouraged. Model summary
Where ethically feasible, the Journal strongly encourages authors to make all data and software code on which the conclusions of the paper rely available to readers. Authors are required to include a data availability statement in their paper. When data and software underlying the research article are available in an online source, authors should include a full citation in their reference list. Fo…
Source ↗Publisher website ·- Publication ethics Screening for misconduct
Manuscripts will be screened using iThenticate to help detect publication misconduct including plagiarism and redundant publication. The Journal uses ScholarOne's Unusual Activity Detection tool to build confidence in the identity of authors and reviewers. Manuscripts may also be screened, including with services provided by third parties, to help detect integrity issues such as inappropriate imag…
Source ↗Publisher website ·- Open access Open access charges
Please see the details of open access licenses and charges. If you select an open access license, you must pay the open access charge or request to use an institutional agreement to pay the open access charge through our licensing and payment portal, SciPris. Please note that prices are subject to change. All stated charges are exclusive of any applicable value added tax, goods and services tax an…
Source ↗Publisher website ·- Peer review Peer review process
Single anonymized peer review. Model summary
The Journal uses the ANSI/NISO Standard Terminology for Peer Review. If you would like further description of the peer review terms used here, please refer to the most recent standard definitions. If further clarification is needed, please contact the editorial office at SLEEP.editorialoffice@technicaeditorial.com. Peer review summary: Identity transparency: single anonymized Reviewer interacts wi…
Source ↗Publisher website ·- Preprints Preprints
Preprint policy: allowed. Model summary
As an author, you retain the right to make an Author’s Original Version (preprint) available through various channels and this does not prevent submission to the Journal. If accepted, you are required to update the status of any preprint, including adding your published paper’s DOI. For full details on allowed channels and updating your preprint, please see our Author self-archiving policy.
Source ↗Publisher website ·- Self-archiving Self-archiving
Self-archiving refers to posting a copy of your work on a publicly accessible website or repository. Under certain circumstances, you may self-archive versions of your work on your own webpages, on institutional webpages, and in other repositories. For information about the Journal's policy, and to learn which version(s) of your paper are acceptable for self-archiving, please see our Author self-a…
Source ↗Publisher website ·
Excerpts are quoted from the journal's website; "model summary" lines are written by Workers AI and checked against the text. The journal's website is authoritative.
Profile
Publication details and official links
- Publisher
- Oxford University Press
- Country or region
- UNITED STATES
- Language
- English
- Frequency
- Monthly
- Founded
- 1978
- ISSN
- 0161-8105
- Electronic ISSN
- 1550-9109
- Society / sponsor
- Sleep Research Society
- Latest issue on the website
- Volume 49, Issue 9 (September 2026)
- Official links
- Journal homepage ↗LetPub
- Submission system ↗Publisher website
FAQ
Frequently asked questions about SLEEP
What CAS zone is SLEEP in?
In the 2025 upgraded edition of the CAS Journal Ranking, SLEEP is in Zone 2 of Medicine, and in Zone 2 of the minor category Clinical Neurology / Neurosciences. In the 2026 Xinrui edition it is in Zone 2 of Medicine. Zones from different editions, and from major and minor categories, are not interchangeable.
What is the impact factor of SLEEP?
The latest impact factor listed by LetPub is 6.54; CiteScore 9.8, h-index 309.
How long does peer review take at SLEEP?
Based on the dates recorded on 81 articles published between October 2024 and October 2026 (the last 24 months), the median time from submission to acceptance is 115 days (interquartile range 53–170 days); authors report an average review time of 3–8 weeks; the community-reported acceptance is “Fairly hard”. Article statistics cover accepted papers only, publisher figures follow the journal's own definitions, and community reports come from authors' own submissions; none is a promise from the journal.
What are the manuscript requirements of SLEEP?
According to the journal's author guidelines: Abstract: ≤ 250 words; Keywords: 3–10; Reference style: AMA; Templates: Word; Suggested reviewers: Optional. A model extracted these from the author guidelines and each was checked against the text; check the latest version on the journal's website before submitting.
Which databases index SLEEP?
According to LetPub and DOAJ records, SLEEP is indexed in SCIE and Scopus.
Is SLEEP open access, and what is the APC?
SLEEP is a hybrid journal. For open-access publication: APC about USD 4,388.
Sources and updates
The facts on this page come from LetPub, OpenAlex, Publisher website; every figure is tagged with its source and the date it was observed, and conflicting values are kept per source. LetPub source page: view ↗ (archived 2026-08-25). Last updated: .