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INSTRUCTIONS TO AUTHORS

Please note that the journal now encourages authors to complete their copyright licence to publish form online

All manuscripts must be submitted online. Once you have prepared your manuscript according to the instructions below please visit the online submission web site. Instructions on submitting your manuscript online can be viewed here.

The International Journal of Epidemiology is produced six times a year and publishes original work, reviews, articles of interest and letters in the fields of research and teaching epidemiology.

All submissions must be in the English language.

It is a condition of publication in the Journal that authors grant an exclusive licence to the International Epidemiological Association. This ensures that requests from third parties to reproduce articles are handled efficiently and consistently and will also allow the article to be as widely disseminated as possible. As part of the licence agreement, authors may use their own material in other publications provided that the Journal is acknowledged as the original place of publication and Oxford University Press as the Publisher.

Please note that by submitting an article for publication you confirm that you are the corresponding/submitting author and that Oxford University Press ("OUP") may retain your email address for the purpose of communicating with you about the article. You agree to notify OUP immediately if your details change. If your article is accepted for publication OUP will contact you using the email address you have used in the registration process. Please note that OUP does not retain copies of rejected articles

Articles are accepted for publication on condition that they are contributed solely to the International Journal of Epidemiology. The editors cannot enter into correspondence about papers considered unsuitable for publication and their decision is final. Neither the editors nor the publishers accept responsibility for the views and statements of authors expressed in their contributions.

Manuscripts should be prepared in the Vancouver Style (e.g. Int J Epidemiol 2014; 43: 614-622) and submitted online here. They should not normally exceed 3000 words but review articles may be twice this length. Letters intended for publication should be marked 'For Publication'. Books and monographs for review should also be sent to the Editors-in-Chief.

Manuscripts should be double spaced with margins of 2.5cm. All pages should be numbered. Numbers followed by a unit should be written as figures as should all numbers above nine. Figures should not be used to start a sentence and those between 999 and 9999 should not be separated by spaces or commas while those over 10 000 should have a space after the thousand. Per cent should be written as % throughout. Full points should not be used after initials or contractions: J Jones, FRCS, 17 g, dl, Dr, etc. All measures should be reported in SI units followed, in the text, by traditional units in parentheses. For general guidance on the International System of Units and useful conversion factors, see Conventional Units - International Units’ (http://www.globalrph.com/conv_si.htm). There are two exceptions: blood pressure should be expressed in mm Hg and haemoglobin as g/dl.

If the data are appropriate, age grouping should be mid-decade to mid-decade or in five-year age groups (e.g. 35-44 or 35-39, 40-44, etc, but not 20-29, 30-39 or other groupings).

TITLES

Titles should be short and specific. Subtitles may be used to amplify the main title.

AFFILIATIONS

The affiliations of each author must be given. If an author's present affiliation is different from that under which the work was done, both should be given.

SUMMARY

The summary should be no more than 250 words and consist of four sections labelled Background, Methods, Results and Conclusions. They should briefly describe the problem addressed, how the study was performed, the salient results and what conclusions can be made from the results. Three to ten keywords should be added to the end of the Summary.

FUNDING

The following rules should be followed:

The sentence should begin: ‘This work was supported by …’
The full official funding agency name should be given, i.e. ‘the National Cancer Institute at the National Institutes of Health’ or simply 'National Institutes of Health' not ‘NCI' (one of the 27 subinstitutions) or 'NCI at NIH’ - see the full RIN-approved list of UK funding agencies for details
Grant numbers should be complete and accurate and provided in brackets as follows: ‘[grant number ABX CDXXXXXX]’
Multiple grant numbers should be separated by a comma as follows: ‘[grant numbers ABX CDXXXXXX, EFX GHXXXXXX]’
Agencies should be separated by a semi-colon (plus ‘and’ before the last funding agency)
Where individuals need to be specified for certain sources of funding the following text should be added after the relevant agency or grant number 'to [author initials]'.

An example is given here: ‘This work was supported by the National Institutes of Health [P50 CA098252 and CA118790 to R.B.S.R.]
and the Alcohol & Education Research Council [HFY GR667789].

Oxford Journals will deposit all NIH-funded articles in PubMed Central. See Depositing articles in repositories – information for authors for details. Authors must ensure that manuscripts are clearly indicated as NIH-funded using the guidelines above. Requests for papers to be deposited should be sent to openaccess@oup.com

REFERENCES

Authors are responsible for the accuracy and completeness of reference lists. References in Vancouver Style should be in the order they appear in the text and numbered accordingly. These numbers should be inserted in superscript whenever a reference is cited (...confirmed by other studies. 23). Numbered references should appear at the end of the article and should consist of the surnames and initials of all authors when six or less, when seven or more list just three and add et al., title of article, name of journal abbreviated according to Index Medicus style, year, volume, first and last page numbers,

e.g. Steck N, Junker C, Maessen M, Reisch T, Zwahlen M, Egger M. Suicide assisted by right-to-die associations: a population based cohort study. Int J Epidemiol 2014;431:614-622.

Titles of books should be followed by the place of publication, the publisher, and the year. 'Unpublished Observations', 'Personal Communications' and submitted manuscripts may not be used as references but should appear in the text. Manuscripts in press may be cited in the references and details added on proof if possible.

ABBREVIATIONS

Words to be abbreviated should be spelt out in full the first time they appear in the text with the abbreviations in brackets. Thereafter the abbreviation should be used.

TABLES

Tables should be numbered consecutively in arabic numerals and should be kept separate from the text. Particular care should be taken to make tables self-explanatory with adequate headings and footnotes. The position of each table in the text should be indicated (Table 1 here).

FIGURES

Illustrations should be numbered, given suitable legends. They should be kept separate from the text.
Colour illustrations can be reproduced if there is sufficient scientific merit in doing so. Authors will be expected to pay for the cost of colour origination in the print version of the Journal (£350/figure). Alternatively, black and white figures can appear in the printed version of an article with colour versions appearing online (for which there is no charge). Please state your preferred option (i.e. agreement to pay £350/figure for print and online colour or preference for online-only colour with no charge) upon submission via the online submission system.
Please ensure that the prepared electronic image files print at a legible size and are of a high quality for publication. For useful information on preparing your figures for publication, go to http://cpc.cadmus.com/da. You can also see our figure guidelines.

APPENDICES

As a general rule, material of this nature should be incorporated in the text but separate sections can be published after the main text.

SPECIAL NOTES FOR STATISTICAL PAPERS

The correct preparation of statistical manuscripts is particularly important and the precise nature and position of each symbol must be clear. Complex formulae should be drawn out on a separate sheet and attached to the text at the appropriate place.In general, distinction should be made between:

  1. capitals and small letters;
  2. ordinary and bold-faced letters;
  3. certain greek letters and similar roman letters;
  4. subscripts, superscripts and 'ordinary' symbols.

Bold-faced symbols should be underlined with a wiggly line in pencil. Statistical symbols are automatically set in italics and need not be underlined except to prevent ambiguity, e.g. when an isolated letter, such as a, occurs in the text. Symbols should not be used to start a sentence.

LANGUAGE EDITING

Particularly if English is not your first language, before submitting your manuscript you may wish to have it edited for language. This is not a mandatory step, but may help to ensure that the academic content of your paper is fully understood by journal editors and reviewers. Language editing does not guarantee that your manuscript will be accepted for publication. If you would like information about one such service please click here. There are other specialist language editing companies that offer similar services and you can also use any of these. Authors are liable for all costs associated with such services.

COPY EDITING

All accepted manuscripts are subject to copy editing.

PROOFS

The first author will receive a pdf proof of the article. Proof correction must not be used as an opportunity to revise the paper. Any essential changes should take up the same amount of space if possible. Alterations, other than corrections of printer's errors, are expensive and may be charged to authors. Corrections should be returned within in 3 days to guarantee inclusion.

It is particularly important to read reference lists at the proof stage in case any omissions/errors have been found and noted during copy editing.

The Editors reserve the right to make minor grammatical and other changes at any stage before publication. These are sometimes necessary to make the paper conform to the general style of the Journal.

OFFPRINTS

Offprints may be purchased using the Oxford Journals Author Services site. Orders from the UK will be subject to a 20% VAT charge. For orders from elsewhere in the EU you or your institution should account for VAT by way of a reverse charge. Please provide us with your or your institution’s VAT number.

SUPPLEMENTARY DATA

Supporting material that is not essential for inclusion in the full text of the manuscript, but would nevertheless benefit the reader, can be made available by the publisher as online-only content, linked to the online manuscript. The material should not be essential to understanding the conclusions of the paper, but should contain data that is additional or complementary and directly relevant to the article content. Such information might include more detailed Methods, extended data sets/data analysis, or additional figures (including colour). All text and figures must be provided in suitable electronic formats (for instructions for the preparation of Supplementary Data please go to here).

All material to be considered as Supplementary Data must be submitted at the same time as the main manuscript for peer review. It cannot be altered or replaced after the paper has been accepted for publication. Please indicate clearly the material intended as Supplementary Data upon submission. Also ensure that the Supplementary Data is referred to in the main manuscript where necessary.

SPECIAL SERIES

Cohort Profiles
The Journals Cohort Profile series is open to all cohort studies which have collected or are in the process of collecting repeat data on a selected set of individuals. It includes open and closed cohort and cohort consortia. Full instructions to authors can be found here

Cohort Profile Updates
Authors wishing to update Cohort Profiles already published in the IJE should click here

Data Resource Profiles
This series covers any dataset of use to epidemiologists that falls outside the rubric of a cohort study. Typical examples include the Human Mortality Database and the Indian National Family Health Survey Study. Large randomised controlled trials and clinical case series with long-term follow-up will also generally be considered data resources rather than cohorts. Full instructions to authors can be found here

The Education Corner
The purpose of this series is to provide easily accessible concise updates and reviews of epidemiologic concepts and methods suitable for educational use. Advice to authors of papers for the Education Corner can be found here

Health and Demographic Surveillance System Profiles
The aim of this series is to prvide IJE readers with up-to-date details of HDSSs across the world. Full instructions to authors can be found here

LETTERS AND RESPONSES

Letter and responses to commentaries and other material in the Journal are encouraged. The lead authors of responses are responsible for contacting all authors of the original paper to ascertain whether they wish to be included in the reply.