The metafor Package

A Meta-Analysis Package for R

User Tools

Site Tools

analyses:berkey1995

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revisionBoth sides next revision
analyses:berkey1995 [2021/10/06 15:48] – Wolfgang Viechtbaueranalyses:berkey1995 [2021/11/08 15:59] – Wolfgang Viechtbauer
Line 63: Line 63:
 These results match exactly what Berkey et al. (1995) report on page 408: The amount of heterogeneity ('between-trial variance') is estimated to be $\hat{\tau}^2 = 0.268$ and the pooled estimate is $\hat{\mu} = -0.5429$ with a standard error of $SE[\hat{\mu}] = 0.1842$. These results match exactly what Berkey et al. (1995) report on page 408: The amount of heterogeneity ('between-trial variance') is estimated to be $\hat{\tau}^2 = 0.268$ and the pooled estimate is $\hat{\mu} = -0.5429$ with a standard error of $SE[\hat{\mu}] = 0.1842$.
  
-==== Mixed-Effects Model ====+==== Mixed-Effects Meta-Regression Model ====
  
-A mixed-effects model with absolute latitude as moderators (centered at 33.46 degrees) can be fitted with:+A mixed-effects meta-regression model with absolute latitude as moderators (centered at 33.46 degrees) can be fitted with:
 <code rsplus> <code rsplus>
 res.ME <- rma(yi, vi, mods=~I(ablat-33.46), data=dat, method="EB") res.ME <- rma(yi, vi, mods=~I(ablat-33.46), data=dat, method="EB")
Line 117: Line 117:
 </code> </code>
  
-==== Fixed-Effects Model ====+==== Fixed-Effects Meta-Regression Model ====
  
-The results from a fixed-effects model with absolute latitude as the predictor can be obtained with:+The results from a fixed-effects meta-regression model with absolute latitude as the predictor can be obtained with:
 <code rsplus> <code rsplus>
 res.FE <- rma(yi, vi, mods=~I(ablat-33.46), data=dat, method="FE") res.FE <- rma(yi, vi, mods=~I(ablat-33.46), data=dat, method="FE")
analyses/berkey1995.txt · Last modified: 2022/10/19 18:55 by Wolfgang Viechtbauer