Monday, January 9, 2017

Statistics Factoids

Sensitivity = TP / (TP+FN)

Specificity = TN / (TN+FP)

Odds ratio = The odds of exposure to a risk factor in diseased patients, divided by the odds of exposure to a risk factor in undiseased patients.

Relative risk is the odds of exposure to a risk factor in diseased individuals, divided by the odds of exposure in the general population, aka diseased +undiseased individuals.

For rare diseases and large patient numbers, the odds ratio and relative risk approximate.

1 comment:

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