Version 2.0-0 of meta (an R package for meta-analysis) is now available
on CRAN. Changes are described below.
Yours,
Guido
Major revision
R package meta linked to R package metafor by Wolfgang Viechtbauer to
provide additional statistical methods, e.g. meta-regression and other
estimates for tau-squared (REML, ...)
New functions:
- metareg (meta-regression)
- metabias (generic method for function metabias)
- metabias.default (generic method for function metabias)
- metabias.meta (generic method for function metabias)
- metabias.rm5 (generic method for function metabias)
- print.rm5 (generic method for rm5-object)
- print.summary.rm5 (generic method for rm5-object)
- summary.rm5 (generic method for rm5-object)
- catmeth (function used internally)
- crtitle (function used internally)
- hypergeometric (function used internally)
- is.installed.metafor (function used internally)
- kentau (function used internally)
- linregcore (function used internally)
- p2logit (function used internally)
Functions metabin, metacont, metacor, metagen, metaprop:
- new arguments:
- hakn (Hartung-Knapp method)
- method.tau (estimation method for tau-squared)
- tau.preset (fixed value for tau)
- TE.tau (prespecified treatment effect to estimate tau)
- method.bias (test for funnel plot asymmetry used in metabias)
- label.left (Label on left side of forest plot, new argument in
functions metabin, metacont, and metagen)
- label.right (Label on right side of forest plot, new argument in
functions metabin, metacont, and metagen)
- warn (print warning messages, new argument in functions metacont
and metagen)
- new list components of returned object:
- se.tau2 (standard error of tau-squared)
- hakn (Hartung-Knapp method)
- method.tau (estimation method for tau-squared)
- tau.preset (fixed value for tau)
- TE.tau (prespecified treatment effect to estimate tau)
- method.bias (test for funnel plot asymmetry used in metabias)
- label.left (Label on left side of forst plot, new list component
in functions metabin, metacont, and metagen)
- label.right (Label on right side of forst plot, new list component
in functions metabin, metacont, and metagen)
- argument 'warn' suppresses more warning messages if FALSE
- function metabin: studies are excluded from meta-analysis if
(event.e > n.e | event.c > n.c) or (n.e <= 0 | n.c <= 0) or
(event.e < 0 | event.c < 0)
Function metacum and metainf:
- modified so that NULL is returned if function is used with a single
study
- modified so that new arguments hakn, method.tau, tau.preset,
method.bias, label.left, label.right are considered in execution of
the function
- argument level removed
Function metaprop:
- modified so that the correct variance function 1/(n+0.5) instead of
1/(n+1) is used for the Freeman-Tukey-Transformation (i.e. sm="PFT")
- see also news on function asin2p
Function asin2p:
- completely rewritten as back transformation of Freeman-Tukey
transformed proportions was inaccurate
- back transformation of Freeman-Tukey proportions according to
Miller (1978) - see help page of R command metaprop
Function print.metabias:
- print a warning if number of studies is too small to conduct a
test for funnel plot asymmetry (see new argument k.min)
Function print.summary.meta:
- new argument bylab.nchar
- print test for subgroup differences for both fixed effect and
random effects model
- value 'invisible(NULL)' returned for metacum and metainf objects
Function metacr:
- new arguments:
- sm (summary measure)
- method (pooling method)
- comb.fixed (fixed effect model)
- comb.random (random effects model)
- swap.events (only for binary data)
- method.tau (estimation method for between-study variance)
- hakn (Hartung-Knapp adjustment)
- title (Title of Cochrane review)
- complab (Comparison label)
- outclab (Outcome label)
- warn (print warning messages)
- removed argument:
- smother (summary measure)
- value 'NULL' returned if no data is available for selection of
comp.no and outcome.no
Function read.rm5:
- changed substantially for reading of RevMan 5.1 files
Function summary.meta:
- modified so that new arguments hakn, method.tau, tau.preset,
method.bias are considered in execution of the function
- argument 'warn' suppresses more warning messages
Function forest.meta:
- modified so that the treatment effect and 95% confidence interval
is printed in the correct order for objects of class metaprop if
argument sort or order is used
- symmetric forest plot by default (argument xlim="s")
- new arguments:
- smlab, smlab.pos, fs.smlab, fflab
(Label for summary measure - at top of figure)
- label.right, label.left, fs.lr, ff.lr
(Label on right and left side)
- overall.hetstat (heterogeneity information for overall effect)
Function funnel.default and funnel.meta:
- modified so that arguments col.fixed and col.random are recognised
Function metabias.default and metabias.meta:
- new argument k.min:
test for funnel plot asymmetry only conducted if number of studies
in meta-analysis is larger or equal to k.min
- new argument '...' (ignored at the moment)
Function trimfill.default and trimfill.meta:
- value 'invisible(NULL)' returned if number of studies is smaller
than 3
New datasets: amlodipine, cisapride
File FLEISS93.MTV moved from directory data to directory extdata
Update of several help pages. Some new help pages added.
--
Dr. Guido Schwarzer (s...@imbi.uni-freiburg.de)
Institute of Medical Biometry and Medical Informatics
Stefan-Meier-Str. 26, D-79104 Freiburg | Phone: +49 (0)761 203 6668
http://www.imbi.uni-freiburg.de | Fax: +49 (0)761 203 6680
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