About CMAJ

CMAJ showcases innovative research and ideas aimed at improving health for people in Canada and globally. It publishes original clinical research, analyses and reviews, news, practice updates and thought-provoking editorials. In 2011, the journal celebrates 100 years of publishing medical knowledge in print and now online at cmaj.ca. CMAJ has an impact factor of 7.3 and its website receives over 30 million requests a year.

CMAJ — 100 years of medical knowledge

CMAJ has had significant impact on medicine and health care in Canada — and the world — over the last 100 years. In Canada, the journal has played a key role in raising awareness of health and medico-social issues on topics such as the link between sun exposure and skin cancer, the dangers of smoking, contraception, abortion, euthanasia and other topics.
Some highlights:

  • 1918 — CMAJ outlines cross-Canada clinical response to the Spanish flu

  • 1922 — Banting and Best article on insulin published in CMAJ; Banting and Macleod awarded Nobel Prize for discovery of insulin in 1923

  • 1938 — CMAJ warns about the relationship between sun exposure and skin cancer

  • 1944 — CMAJ reports on the use of penicillin in the civilian population

  • 1960 — An editorial in the journal warns about the hazards of smoking

  • 1983 — Canada's first review article on AIDS published by CMAJ

  • 2003 — CMAJ responds rapidly to SARS (severe acute respiratory syndrome), publishing timely information during the outbreak

CMAJ was the first journal to publish ground-breaking research such as:

  • 1921 — the use of living sutures in surgery by W.E. Gallie and A.B. LeMesurier

  • 1925 — the isolation of the parathormone, which increases blood calcium levels, by James Collip, a co-discoverer of insulin

  • 1926 — the first use of liver as a treatment for anemia, which led to the isolation of vitamin B12

  • 1981 — in its section "Clinical Epidemiology Rounds", CMAJ published a series of articles by David Sackett and coauthors on "how to read clinical journals". In these 8 articles, the authors describe how to determine whether a journal article contains valid information worth applying to clinical practice. The approach pioneered here of using the best evidence to enable clinicians to make decisions for patient-care based on credible data would become known a decade later as "evidence-based medicine" (EBM). Evidence-based medicine has since been adopted as a guiding principle of clinical practice by health professionals in most countries around the world.

  • 2009 — CMAJ publishes a research paper on the increased risk of reinfarction associated with proton pump inhibitors and clopidogrel http://www.cmaj.ca/cgi/content/abstract/180/7/713 which has been widely cited, with more than 133 citations (as of December 2, 2010) and generated related research studies on the topic.

CMAJ Benefits

  • Team of international, medically qualified editors

  • High-quality, timely peer review (initial decision to review within 2 weeks)

  • Profile — regular news coverage of CMAJ articles in Canadian and international media ensures knowledge transfer and profile for authors.

  • Cmaj.ca contains the complete editorial contents of the print issue of CMAJ, supplemented with additional online content

  • Impact factor of 7.3 in 2009 (Thompson ISI)

  • The Journal is part of the PubMed Central collection of journals www.pubmedcentral.nih.gov at the National Library of Medicine. This affiliation guarantees permanent archiving and open access.

Long History

  • Published continuously since 1911, new content is uploaded on cmaj.ca every Monday at noon EST/EDT and publishes biweekly print issues. Issues from 1911 to the present are available on PubMed Central.


CMAJ research papers and editorials attract attention. For example,

  • A research paper on the increased risk of reinfarction associated with proton pump inhibitors and clopidogrel http://www.cmaj.ca/cgi/content/abstract/180/7/713 has been widely cited, with more than 133 citations (as of fall 2010). It also generated widespread coverage in Canadian and international media.

  • A study on the seasonal flu vaccine and a reduction in the rate of first heart attacks http://www.cmaj.ca/cgi/content/abstract/182/15/1617 received more than 1000 news items in major international media from the United Kingdom, the United States, India, China as well as Canada and other countries.

  • A research study on antidepressants and the increased risk of miscarriage http://www.cmaj.ca/cgi/content/abstract/182/10/1031 generated over 300 media mentions. More than half the coverage was from international media in the UK, Germany, the United States, India and other countries including Time Magazine, U.S. News & World Report, National Women's Health Information Centre, BusinessWeek, The Scotsman, UPI, The Mirror UK, Telegraph UK and The Times of India.


  • The Journal receives more than two thousand of manuscripts a year, including letters to the editor and news articles, from around the world. CMAJ's acceptance rate for unsolicited research and review articles is about 10%.

To submit an article, visit http://www.cmaj.ca/authors/.

CMAJ's Impact Factor

Impact Factor
2009 7.3
2008 7.5
2007 7.1
2006 6.9
2005 7.4
2004 5.9
2003 4.8
2002 3.2
2001 2.8
2000 2.4
1999 2.4
1998 1.4
1997 1.6

Survey Results

Physician Resource Questionnaire

2007 cmaj.ca User Survey

2005 cmaj.ca User Survey

2004 cmaj.ca User Survey

2003 cmaj.ca User Survey

2002 cmaj.ca User Survey

2000 cmaj.ca User Survery

For More Information


Governance Review Panel Final Report

Staff List (including Competing Interests)