Equation Review Flashcards
sensitivity
sensitivity=TP/(TP+FN)
page 49
specificity
specificity= TN/(TN+FP)
page 49
positive predictive value
PPV=TP/(TP+FP)
page 49
negative predictive value
NPP=TN/(FN+TN)
page 49
odds ratio (for case control studies)
OR=(a/c)/(b/d)= ad/bc
page 50
relative risk
RR=[a/(a+b)]/[c/(c+d)]
page 50
attributable risk
AR= [a/(a+b)]-[c/(c+d)]
page 50
relative risk reduction
RRR=1-RR
absolute risk reduction
ARR=[c/(c+d)]-[a/(a+b)]
page 50
number needed to treat
NNT=1/absolute risk reduction
page 50
number needed to harm
NNH=1/attributable risk
page 50
Hardy-Weinberg equilibrium
p^2 + 2pq + q^2 = 1
p+q=1
page 81
volume of distribution
Vd= amount of drug in body/plasma drug concentration
page 243
half-life
t1/2 = (.7 x Vd)/CL
page 243
drug clearance
CL=rate of drug elimination/plasma drug concentration
=Vd x Ke (elimntaion constant)
page 243
