metaprop {meta} | R Documentation |
Calculation of an overall proportion from studies reporting a single proportion.
metaprop(event, n, studlab, data = NULL, subset = NULL, freeman.tukey=TRUE, level = 0.95, level.comb = level)
event |
Number of events. |
n |
Number of observations. |
studlab |
An optional vector with study labels. |
data |
An optional data frame containing the study information, i.e., event and n. |
subset |
An optional vector specifying a subset of studies to be used. |
freeman.tukey |
A logical indicating if the Freeman-Tukey Double arcsine transformation should be used; otherwise the arcsine transformation is used. |
level |
The level used to calculate confidence intervals for individual studies. |
level.comb |
The level used to calculate confidence intervals for pooled estimates. |
Meta-analysis of single proportions using either the Freeman-Tukey Double arcsine transformation or the arcsine transformation of proportions to calculate an overall proportion; both fixed effect and random effects estimates are calculated.
An object of class c("metaprop", "meta")
with corresponding
print
, summary
, plot
function. The object is a
list containing the following components:
event, n, studlab, freeman.tukey |
As defined above. |
TE, seTE |
Arcsine transformation of proportion and its standard error for individual studies. |
w.fixed, w.random |
Weight of individual studies (in fixed and random effects model). |
TE.fixed, seTE.fixed |
Estimated overall arcsine transformed proportion and standard error (fixed effect model). |
TE.random, seTE.random |
Estimated overall arcsine transformed proportion and standard error (random effects model). |
k |
Number of studies combined in meta-analysis. |
Q |
Heterogeneity statistic Q. |
tau |
Square-root of between-study variance (moment estimator of DerSimonian-Laird). |
sm |
A character string: "proportion" |
method |
A character string indicating method used
for pooling: "Inverse" |
call |
Function call. |
Guido Schwarzer sc@imbi.uni-freiburg.de
Freeman MF & Tukey JW (1950), Transformations related to the angular and the square root. Annals of Mathematical Statistics, 21, 607–611.
Miller JJ (1978), The inverse of the Freeman-Tukey double arcsine transformation. The American Statistician, 32, 138.
metaprop(0, 10) metaprop(0, 10, freeman.tukey=FALSE)