plot.mm_perf function

Forest Plots

Function to create forest plots for objects of class "mm_perf".

## S3 method for class 'mm_perf'
plot(x, ...)

Arguments

• x: An object of class "mm_perf"
• ``: Additional arguments which are passed to forest .

Returns

An object of class ggplot

Details

The forest plot shows the performance estimates of each study with corresponding confidence intervals.

Examples

data(EuroSCORE)

# Calculate the c-statistic and its standard error
est1 <- ccalc(cstat = c.index, cstat.se = se.c.index, cstat.cilb = c.index.95CIl, 
              cstat.ciub = c.index.95CIu, N = n, O = n.events, data = EuroSCORE, slab = Study)
plot(est1)

# Calculate the total O:E ratio and its standard error
est2 <- oecalc(O = n.events, E = e.events, N = n, data = EuroSCORE, slab = Study)
plot(est2)

References

Lewis S, Clarke M. Forest plots: trying to see the wood and the trees. BMJ. 2001; 322(7300):1479--80.

Author(s)

Thomas Debray thomas.debray@gmail.com