: Re: [Freesurfer] longitudinal statistics LGI
Hi Jon
Your contrast matrix depends on the hypothesis you want to test. Contrast
matrices for lme are specified in the same way as for the General Linear Model.
Nothing different here.
It's a matrix of L rows where L>=1 and the same n
pulation parameters) in your
model.
Best-Jorge
De: Jon Alan Wieser
Para: jorge luis
CC: "freesurfer (freesurfer@nmr.mgh.harvard.edu)"
Enviado: Domingo 28 de diciembre de 2014 10:23
Asunto: Re: [Freesurfer] longitudinal statistics LGI
#yiv9096281212 #yiv9096281212 --
isdahl Medina ;
"alicia.thomas@gmail.com"
Enviado: Martes 16 de diciembre de 2014 15:24
Asunto: Re: [Freesurfer] longitudinal statistics LGI
Jorge,
We are interested in examining the impact of cannabis exposure (time-varying
continuous variable) on local gyrification index over 3 ti
edina; alicia.thomas@gmail.com
Subject: Re: [Freesurfer] longitudinal statistics LGI
Hi Jon
We recommend to order the columns of your design matrix in the following way:
First, the intercept term (which is a column of ones); second, the time
covariate; third, any time-varying covariate
ew to longitudinal LME analyses.
Thanks again
Jon
From: jorge luis
Sent: Wednesday, December 17, 2014 9:25 AM
To: Freesurfer support list; Jon Alan Wieser
Cc: Krista Lisdahl Medina; alicia.thomas@gmail.com
Subject: Re: [Freesurfer] longitudinal statistics LG
, WI 53211
Phone: 414-229-7145
Fax: 414-229-5219
From: freesurfer-boun...@nmr.mgh.harvard.edu
on behalf of jorge luis
Sent: Tuesday, December 2, 2014 12:34 PM
To: Freesurfer support list
Subject: Re: [Freesurfer] longitudinal statistics LGI #yiv6533942457
#yiv6533942457 --p {margin-bottom:0.1in;li
2441 East Hartford Ave
Milwaukee, WI 53211
Phone: 414-229-7145
Fax: 414-229-5219
From: freesurfer-boun...@nmr.mgh.harvard.edu
on behalf of jorge luis
Sent: Tuesday, December 2, 2014 12:34 PM
To: Freesurfer support list
Subject: Re: [Freesurfer] longitudinal
p { margin-bottom: 0.1in; line-height: 120%; }Hi Jon
I guess that whenyou say “we have continuous data as to the amount of drug
usage”you actually mean that the amount-of-drug-usage is a continuousvariable
that changes over time for each subject. So yes you can keepthis variable as a
continuous
