orchaRd (version 2.2.1)

ratio_i2: ratio_i2

Description

I2 (I-squared) for mulilevel meta-analytic models based on Nakagawa & Santos (2012). Under multilevel models, we can have a multiple I2 (see also Senior et al. 2016).

Usage

ratio_i2(model)

Value

A named numeric vector of I2 (I-squared) values expressed as percentages. The first element, I2_Total, is the total heterogeneity; each remaining element (named I2_<level> after a random-effect level of the model) is the heterogeneity attributable to that level.

Arguments

model

Model object of class rma.mv or rma.

Examples

# \donttest{
library(metafor)
data(english)
english <- escalc(measure = "SMD", n1i = NStartControl,
sd1i = SD_C, m1i = MeanC, n2i = NStartExpt,
sd2i = SD_E, m2i = MeanE, var.names=c("SMD","vSMD"),data = english)
english_MA <- rma.mv(yi = SMD, V = vSMD,
random = list( ~ 1 | StudyNo, ~ 1 | EffectID), data = english)
ratio_i2(english_MA)
# }