Size and power
Power and sample size. Power and sample size are two related concepts, which have to do with the ability to detect the studied effect.
Science without sense...double nonsense
Evidence Based Medicine pills
Science without sense...double nonsense
Evidence Based Medicine pills
Read MoreSize and power
Do not gamble
Binomial probability. Binomial probability allows us to show that if we play roulette, except on rare occasions with luck, the bank always wins.
The turn of the screw
Youden’s index. Youden’s index or accuracy index is described, as well as the number needed to diagnose and the number needed to misdiagnose.
The table
Contingency tables. Contingency tables are described for the most common studies: cross-sectional, case-control, and cohort studies.
Residuals management
Residuals. The calculation of the residuals of a contingency table is shown, using the observed and expected values.