Biostats Flashcards
1
Q
Equation for number needed to harm
A
NNH = 1/absolute risk increase
2
Q
Positive predictive value (PPV) equation
A
TP/(TP+FP)
3
Q
Subjects randomly allocated to a sequence of 2 or more treatments given consecutively
A
Crossover study
4
Q
Power
A
Indicates the probability of seeing a difference when there is one. Power = 1 - beta, where beta is the type II error rate
5
Q
Equation for odds ratio
A
OR = ad/bc
6
Q
Relative risk
A
Risk of an outcome in the exposed divided by the risk of that outcome in the unexposed. RR = [a/(a+b)]/[c/c+d)]
