Convert the proportion of events in the experimental groups to risk differences and ratios and vice versa.

Source: R/harmBound_functions.R

Convert the proportion of events in the experimental groups to risk differences and ratios and vice versa.

convertRisks(
  eprop = NULL,
  etotal = NULL,
  rd = NULL,
  rr = NULL,
  or = NULL,
  r0 = NULL,
  n0,
  n1 = n0
)

Arguments

eprop

proportion of events in experimental group

etotal

total number of events

rd

risk difference

rr

risk ratio

or

odds ratio

r0

risk in the control group

n0

number of patients in the control group

n1

number of patients in the experimental group

Value

vector with risks in control and experimental group (r0, r1), the risk difference (rd), risk ratio (rr) and odds ratio (or)

Examples

convertRisks(eprop=0.5,etotal=100,n0=200)
#>  eprop etotal     n0     n1     r0     r1     rd     rr     or 
#>   0.50 100.00 200.00 200.00   0.25   0.25   0.00   1.00   1.00 
convertRisks(eprop=0.6,etotal=100,n0=200)
#>      eprop     etotal         n0         n1         r0         r1         rd 
#>   0.600000 100.000000 200.000000 200.000000   0.200000   0.300000   0.100000 
#>         rr         or 
#>   1.500000   1.714286 
convertRisks(rr=1.5,n0=200,r0=0.2)
#>      eprop     etotal         n0         n1         r0         r1         rd 
#>   0.600000 100.000000 200.000000 200.000000   0.200000   0.300000   0.100000 
#>         rr         or 
#>   1.500000   1.714286