Evidence Based Medicine pills
Evidence Based Medicine pills
Student’s t distribution. Student’s t probability distribution allows estimating the value of the population mean of a random variable that follows a normal distribution when the parameter is extracted from a small sample and the population variance is unknown. Something…
Pragmatic clinical trial. We all know how difficult it is to make a new drug available to people who can benefit from it. From the moment a promising molecule is identified and somebody thinks that it may be useful, until…
Factors that condition the sample size. The need to perform a correct calculation of the sample size necessary for a study is reviewed, as well as the main factors that influence the sample required to demonstrate the effect considered relevant…
Correct use of NNT. The NNT was designed to assess the beneficial effect of a treatment to reduce the risk of an unpleasant event occurring in an intervention group of interest, always with respect to what was observed in a…
Fisher’s exact test. Fisher’s test is the exact method used when you want to study if there is an association between two qualitative variables, that is, if the proportions of one variable are different depending on the value of the…