nmafunnel function

Comparison-adjusted funnel plot

A comparison-adjusted funnel plot for the studies involving treatment 1 (reference treatment specified in setup) is generated.

nmafunnel(x, method="NH", legends="topright")

Arguments

• x: Output object of setup
• method: Estimation and prediction method. NH: Noma-Hamura's improved REML-based methods (default). REML: The ordinary REML method.
• legends: Location of the legend on the plot (default: topright)

Returns

Comparison-adjusted funnel plot for the studies involving treatment 1 (reference treatment specified in setup) is presented.

• coding: A table that presents the correspondence between the numerical code and treatment categories (the reference category is coded as 1).
• summary: design: design of studies, N: number of the corresponding studies, n: total sample size.

References

Chaimani, A. and Salanti, G. (2012). Using network meta-analysis to evaluate the existence of small-study effects in a network of interventions. Research Synthesis Methods 3 , 161–176.

Chaimani, A., Higgins, J. P., Mavridis, D., Spyridonos, P., and Salanti, G. (2013). Graphical tools for network meta-analysis in Stata. PLoS One 8 , e76654.

Examples

data(heartfailure)

hf2 <- setup(study=study,trt=trt,d=d,n=n,measure="OR",ref="Placebo",data=heartfailure)
hf4 <- setup(study=study,trt=trt,d=d,n=n,measure="RD",ref="Placebo",data=heartfailure)

nmafunnel(hf2,legends="bottomright")
nmafunnel(hf4)