The backdoor
Confounding variable. A confounding variable is associated with the exposure and the effect without being part of the cause-effect chain between the two.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Read MoreThe backdoor
The consolation of not being worse
Equivalence and non-inferiority. Equivalence clinical trials aim to show that the new treatment is equivalent to the current one.
The imperfect screening
Diagnostic screening. The characteristics of the diagnostic screening and the ways of calculating the prevalence of the disease from its results are described.
An important decision
Sampling techniques. The characteristics of the sampling and the main sampling techniques, both probabilistic and non-probabilistic, are described. Life is full of important decisions. We decided what to study. Sometimes, very few, we can decide where to work. We decided if we marry and…
That’s not what it seems to be
Cross-sectional studies. Cross-sectional studies are observational studies that study more than one variable to determine if there is an association among them.