Register for an account

X

Enter your name and email address below.

Your email address is used to log in and will not be shared or sold. Read our privacy policy.

X

Website access code

Enter your access code into the form field below.

If you are a Zinio, Nook, Kindle, Apple, or Google Play subscriber, you can enter your website access code to gain subscriber access. Your website access code is located in the upper right corner of the Table of Contents page of your digital edition.

Mind

Fake Clinical Trial - Real Problems

NeuroskepticBy NeuroskepticMarch 26, 2011 7:50 PM

Newsletter

Sign up for our email newsletter for the latest science news

Here at Neuroskeptic we've seen our fair share of dubiousclinical trials over the years, but the Indian Journal of Psychiatry has just published one which really takes the biscuit, because it was completely made up.

placeholder

Luckily, the trial is actually a rather neat spoof paper, written for educational purposes to highlight bad practices in the design and writing up of clinical trials. It's accompanied by a serious piece which analyzes these problems. They're both open access so you can take a look.

The sham study is ostensibly a trial of a new antidepressant, "placeboxetine", compared to an older drug for depression - but it was really written by one of the Editors of the journal via "Common shortcomings in manuscripts submitted to the Indian Journal of Psychiatry were collated into a single manuscript". These shortcomings are certainly not limited to Indian papers.

The problems included:

  • No placebo group. This is extremely common in trials comparing two drugs, so it's "accepted practice", but it's still a bad thing.

  • The "placeboxetine" was given at a higher dose, relative to its dose range, than the comparison drug but they don't say why.

  • Side effects are reported but they don't explain how these were assessed. If you specifically ask about them you find a lot more than if you rely on patients to spontaneously complain.

  • Subtle, but important, issues with the statistics, such as reliance on t-tests over more appropriate methods.

  • The trial had some unusual features for a depression trial - with no explanation. Most patients were males in their 20s, while the norm is for about 65% females and an average age in the 40s; very few people dropped out; very few people who were screened were excluded, whereas most trials exclude loads of people for all kinds of reasons.

  • The effectiveness of both drugs was remarkably high (75% cure rate over 6 weeks - better than any treatment, drug or therapy, would be expected to show.) Yet they don't mention this.

  • It was badly written. The title in particular was far too long and clumsy.

  • It turns out that the trial was sponsored by the fictional pharmaceutical company, and was probably conducted to help get placeboxetine sold in India - but we only find this out in the small print at the end.

  • Hot pink and white is not a good color scheme for your graphs, or for anything except marshmallows. (I may have added this myself.)

Overall I think this kind of thing is extremely valuable. The author's final comments, however, are a bit questionable. He advises people running clinical trials to base their research protocol, and their paper, on previously published studies of a similar nature published in good journals. Unfortunately, even leading journals publish stuff which suffers from some of these problems...

rb2_large_white.png

Andrade C (2011). A 6-week, multicentre, randomized controlled clinical trial to evaluate the safety and efficacy of placeboxetine hydrochloride in the treatment of major depressive disorder in an Indian setting. Indian journal of psychiatry, 53 (1), 69-72 PMID: 21431013

Andrade C (2011). Placeboxetine for major depressive disorder: Researcher, author, reader, and reviewer perspectives on randomized controlled trials. Indian journal of psychiatry, 53 (1), 73-6 PMID: 21431014

    2 Free Articles Left

    Want it all? Get unlimited access when you subscribe.

    Subscribe

    Already a subscriber? Register or Log In

    Want unlimited access?

    Subscribe today and save 70%

    Subscribe

    Already a subscriber? Register or Log In