[R-meta] Ratio of Means

[Viechtbauer Wolfgang (SP)]

I've updated:

http://www.metafor-project.org/doku.php/analyses:vanhouwelingen2002

It now shows how to get the regression of the underlying effects and also how to draw the confidence ellipse.

The 5.99 comes from qchisq(.95, df=2).

Note that the ellipse in the paper (Figure 5) seems to be drawn incorrectly.

Best,
Wolfgang

-- 
Wolfgang Viechtbauer, Ph.D., Statistician | Department of Psychiatry and    
Neuropsychology | Maastricht University | P.O. Box 616 (VIJV1) | 6200 MD    
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-----Original Message-----
From: Nathan Pace [mailto:n.l.pace at utah.edu] 
Sent: Tuesday, July 25, 2017 07:42
To: Viechtbauer Wolfgang (SP); Michael Dewey; r-sig-meta-analysis at r-project.org
Subject: Re: [R-meta] Ratio of Means

Thanks to Gerta, Wolfgang, Michael, and James for comments and pointers to functions and codes.

In my data set the slope is one (0.97 +/- 0.04).

The QE for residual heterogeneity is very large (~30000).

In van Houwelingen (page 605, Figure 5) a coverage ellipse is plotted for vaccination data.

An equation is shown in the figure legend.

I don’t understand the source of the constant (5.99) on the rhs.

Comments?

Nathan