The fairground shotgun
Random error and systematic error. We describe two types of errors, the random error due to measurement randomness and inaccuracies, and the systematic error or bias.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Category Epidemiology
Together but not in each other’s pockets
Hybrid designs The main observational hybrid designs are described: cohort nested cases and controls studies and cohort and case-control studies.
Generalizations are hazardous
Berkson’s fallacy. Berkson’s fallacy is described, which occurs when we find a spurious association between two variables due to a improper sample.
You make your bed, you lie in it
Case-crossover studies. Case-crossover studies focus on the event and try to see something that favors it, comparing the exhibitions of immediate with previous moments.
From the triangle to the pie
Causality. Some causality models and some of their components are described: component cause, necessary cause and sufficient cause.