Hi Gerta,
the paper appeared in Methods Inf Med:
Vogelgesang F, Schlattmann P, Dewey M (2018).? The Evaluation of
Bivariate Mixed Models in Meta-analyses of Diagnostic Accuracy Studies
with SAS, Stata and R. Methods Inf Med. 2018 May;57(3):111-119. doi:
10.3414/ME17-01-0021.
Kind wishes,
? ?Philipp
On Wed, Jun 19, 2019 at 3:19 PM Gerta Ruecker
<ruecker at imbi.uni-freiburg.de <mailto:ruecker at imbi.uni-freiburg.de>>
wrote:
Dear Philipp,
Could you please give a link or full bibliographic details for the
paper
you cited (Vogelsang et al., 2018)? I couldn't find it.
Best,
Gerta
Am 19.06.2019 um 14:59 schrieb Philipp Doebler:
> Hi James,
>
> I have rarely had convergence problems. There are three
>
> (1) Low number of studies (5 model parameters...) but mada
> if I remember correctly.
> (2) Little variance in the false positive rates and/or
> Especially relevant if all studies have the same sensitivity of,
> This can sometimes lead to a degenerate covariance matrix of the
> random effect.
> (3) A perfect between study correlation of logit(sens) and
> there is any suspicion, calculate the correlation matrix with
>
> Also have a look at all standard errors and confidence
> recent simulation study of Vogelsang et al. (2018) discusses
> issues of mada (and other packages).
>
> Kind wishes,
>? ? ?Philipp
>
>
>
>
> On Wed, Jun 19, 2019 at 2:32 PM James Meyer <
> outlook_655291802F3BAFF3 at outlook.com
<mailto:outlook_655291802F3BAFF3 at outlook.com>> wrote:
>> How can you tell if convergence has been accomplished using the
>> function in mada ? Which package do you recommend using for DTA
>> meta-analysis if you have a small number of studies?
>>
>> Sincerely
>> James C Meyer
>> Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for
>> Windows 10
>>
>>
>>? ? ? ? ? [[alternative HTML version deleted]]
>>
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--
Dr. rer. nat. Gerta R?cker, Dipl.-Math.
Institute of Medical Biometry and Statistics,
Faculty of Medicine and Medical Center - University of Freiburg
Stefan-Meier-Str. 26, D-79104 Freiburg, Germany
Phone:? ? +49/761/203-6673
Fax:? ? ? +49/761/203-6680
Mail: ruecker at imbi.uni-freiburg.de
<mailto:ruecker at imbi.uni-freiburg.de>
Homepage: https://www.imbi.uni-freiburg.de/persons/ruecker/person_view
--
Prof. Dr. Philipp Doebler
Technische Universit?t Dortmund
Fakult?t Statistik
Vogelpothsweg 87
44227 Dortmund
Tel.: +49 231-755 8259
Fax: +49 231-755 3918
doebler at statistik.tu-dortmund.de <mailto:doebler at statistik.tu-dortmund.de>
www.statistik.tu-dortmund.de/1261.html
<http://www.statistik.tu-dortmund.de/1261.html>
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