doiplot function

Doi plot for Asymmetry

Implementation of the Doi plot proposed by Furuya-Kanamori et al. (2018) to evaluate bias in meta-analysis.

doiplot(
  TE,
  seTE,
  xlim,
  ylim,
  xlab = NULL,
  ylab = "|Z-score|",
  lfkindex = TRUE,
  pos.lfkindex = "topleft",
  ...
)

Arguments

• TE: An object of class lfkindex or meta or estimated treatment effect in individual studies.
• seTE: Standard error of estimated treatment effect (mandatory if TE not of class lfkindex or meta).
• xlim: The x limits (min,max) of the plot.
• ylim: The y limits (min,max) of the plot.
• xlab: A label for the x-axis.
• ylab: A label for the y-axis.
• lfkindex: A logical indicating whether LFK index should be printed.
• pos.lfkindex: A character string with position of text with LFK index (see legend).
• ...: Additional arguments (passed on to plot.default).

Examples

# Example from Furuya-Kanamori et al. (2018)
#
pain <- data.frame(SMD = c(-4.270, -1.710, -0.580, -0.190, 0.000),
                   varSMD = c(0.158,  0.076,  0.018,  0.022, 0.040))

lfk.pain <- lfkindex(SMD, sqrt(varSMD), data = pain)
lfk.pain

doiplot(lfk.pain)

References

Furuya-Kanamori L, Barendregt JJ, Doi SAR (2018): A new improved graphical and quantitative method for detecting bias in meta-analysis. International Journal of Evidence-Based Healthcare, 16 , 195--203

See Also

lfkindex, metabias, funnel.meta

Author(s)

Gerta Rücker gerta.ruecker@uniklinik-freiburg.de , Guido Schwarzer guido.schwarzer@uniklinik-freiburg.de