“The failure to train doctors about clinical uncertainty has been called “the greatest deficiency of medical education throughout the twentieth century.” Djulbegovic (2004), https://www.bmj.com/content/329/7480/1419 Life is full of uncertainties. In decision making uncertainty means that it is impossible to define future outcomes. Amount of medical information continues to grow exponentially, but uncertainty is still inevitable… Read More »
In the null hypothesis significance testing framework, failure to reject the null is never evidence in support of null. However, it is extremely common that failure to reject the null, ie. getting a p-value larger 0.05 is interpreted as “no difference” or “no evidence”. As many experts have said, “absence of evidence is not evidence… Read More »
In 2017, me and colleagues published both a literature and registry based analysis of use of metal-on-metal hip replacements. This study, titled Lack of evidence—the anti-stepwise introduction of metal-on-metal hip replacements, was a hypothesis-driven study since at that time it seemed that the use of ASR hip replacements was not that evidence based but mainly… Read More »
Our recent study investigating annual trends of revision surgeries in patients with MoM hip replacements was recently published in the Journal of Arthroplasty (www). Here is the GrAbstract of the study: This study is of great importance because it is the largest non-registry based study investigating what sort of trends the number of revision surgeries… Read More »
Prologue Firstly, it is important to describe what post-hoc power really means. Post-hoc power is the power of the test using effect size observed and sample size used in the study. For this reason post-hoc power is often labeled as observed power. If for any experiment the effect size, parameter estimates and sample size is… Read More »
This is a tweetorial about arthroscopic partial meniscectomy I posted on Twitter.
This post describes an adaptation of Gartner Hype Cycle on metal-on-metal hip replacements. It is very unlikely that MoM hip replacements will achieve the “Plateau of Productivity“. Therefore two other later stages are proposed with annotations. Reference 1. Harris WH. Osteolysis and particle disease in hip replacement. A review. Acta Orthop Scand. 1994 Feb;65(1):113-23. 2.… Read More »
Our study about increasing incidence of surgically treated quadriceps tendon ruptures was just published in the Knee Surgery, Sports Traumatology, Arthroscopy. At this moment it is in Open Access format so full-text is freely available. Below is the grabstract, ie. graphical abstract, of our study. In our study we write “There is no evidence of… Read More »
This bothered me a lot, so I acted upon it. A prestigious sports surgery journal, American Journal of Sports Medicine, marketed their own study in Twitter like this:
Being in the worlds largest meeting in my field, I can´t help noticing those little things. Therefore I drafted a congress bingo! Feel free to use and entertain yourself!