1179 e-Letters

  • Letter in response to Bhattachariya et al. August 2012
    Patrick Carroll

    Dear Sirs

    Re:Reproductive outcomes following abortion: A national register- based cohort study in Scotland. Bhattacharya S et al. BMJOpen August 2012

    The authors of this study do not acknowledge that some hundreds of Scottish resident women come to England each year for abortions. As a consequence they are underestimating the risk of premature births post abortion.

    The numbers are significa...

    Show More
  • Corrigendum
    Mark Taylor

    It is worth noting that 'RR' in the title of our article is indeed 'relative risk' but that there is no statistical inference associated with our use of this term.

    Also, I am grateful to Ross Bearman and others for pointing out some typos / errors in our paper - namely: The introduction states cannabis is a class C drug, the correct designation of class B is listed in table 1.

    Figure 2 identifies methyl...

    Show More
  • Response to: "No doubt that dehydration impairs exercise performances and risks health."
    Braden G. O'Neill

    We agree with Dr Stachenfeld that the medical community should consider exercise a priority for research and practice; however we feel it is important to address a concern raised in her response, which questioned the relative importance of systematic reviews compared to an individual randomized trial.

    Systematic reviews of randomized controlled trials are now widely considered to be the highest quality evidence...

    Show More
  • Response to comments to "Criminality in men with Klinefelter's syndrome and XYY syndrome: a cohort study"
    Claus H. Gravholt

    We thank Steve Hammett, Jim Moore and Gary Glissman for their interest in our paper and for their comments. They all express the opinion, to a varying degree, that the content should be detrimental for patients with KS and 47,XYY syndrome. We understand this point, but we disagree, and we can iterate that as physicians caring for hundreds of patients with sex chromosome disorders through many years, being involved in res...

    Show More
  • Response to Fitzpatrick, JP; Elliott, EJ and Latimer, J et al.
    Judith S Gould

    Response to Fitzpatrick, JP; Elliott, EJ and Latimer, J et al. The Lililwan Project: study protocol for a population-based active case ascertainment study of the prevalence of fetal alcohol spectrum disorders (FASD) in remote Australian Aboriginal communities. Fitzpatrick, JP; Elliot, EJ and Latimer, J et al state that, 'standardised and locally developed clinical assessments whose interpretation is less biased by culture...

    Show More
  • No doubt that dehydration impairs exercise performances and risks health.
    Nina Stachenfeld

    I was pleased to see that physicians were at last taking an interest in physical activity as a method of preventive medicine. Further, I could not agree more that there are many claims made by manufacturers regarding improving performance that are unsupported by the literature (if there is any literature at all). In this note, I will not address anything other than claims made regarding fluid regulation, and do not supp...

    Show More
  • Non-normally distributed data
    Rajvir Singh

    To the Editor

    Title : Non-Normally Distributed Data

    Student t test (independent) compares the mean of an outcome variable for different subjects and widely but incorrectly believed that it is valid only for normally distributed outcomes even in very small samples; ignoring the fact that it is also valid for any distribution in large samples (1).

    Normality assumpt...

    Show More
  • Searching for open source software
    Elizabeth A Dodd

    The method chosen by Millard, Bru and Berger to search for open source electronic medical record systems has missed a number of packages. Instead of searching Google Scholar, a search through a generic search engine would have brought up the Wikipedia list http://en.wikipedia.org/wiki/List_of_open-source_healthcare_software This list contains a number of packages (the open source term) not seen on either on the included or...

    Show More
  • Views of Policymakers, healthcare workers, and NGOs, on HIV PrEP a multinational Qualitative Study. By Ana Wheelock et ,al: Published July 5, 2012
    Harriet Nakanyike

    Comment: From some of the focus group discussions with leadership hubs in Uganda from the project "Strengthening Nurses' Capacity in HIV Policy Development in Sub-Saharan Africa and the Caribbean"; a study entitled Effective Dissemination Strategies of HIV Work Policies to Nurses and Midwives in Kampala District, Uganda was conducted. It was noted that many policies are developed and given to nurses to implement without p...

    Show More
  • Re:Re:Re:Hypnotics' association with mortality or cancer: bias related to the study design and analysis
    Daniel F. Kripke

    Dr. Hallas, Dr. Andersen, and colleagues give us the very good news that they are working on a study of benzodiazepine-cancer association using the Danish Cancer Registry. Additional data that isolates benzodiazepine agonists and other hypnotics individually will be very welcome, as different benzodiazepine agonists may have different risks. Perhaps they can provide results from time-dependent Cox models. It will be...

    Show More