meta (version 0.9-17)

metaprop: Meta-analysis of single proportions

Description

Calculation of an overall proportion from studies reporting a single proportion.

Usage

metaprop(event, n, studlab,
         data = NULL, subset = NULL,
         freeman.tukey=TRUE,
         level = 0.95, level.comb = level)

Arguments

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.

Value

• 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.

Details

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.

References

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.

See Also

metacont, metagen, print.meta

Examples

metaprop(0, 10)
metaprop(0, 10, freeman.tukey=FALSE)