Re: Association between two variables over time

Posted by John Amora-2 on Jun 17, 2021; 3:40pm
URL: http://spssx-discussion.165.s1.nabble.com/Association-between-two-variables-over-time-tp5740594p5740598.html

Hi, Andreas.

I am not sure if I understood your research problem correctly, but the following is my suggestion:

For your two variables (say, X and Y), you will have values of X and Y for all your subjects at Time 0 (initial time).  This means that you can correlate the X and Y at Time 0.

Moreover, you will have a slope of X (say, SLOPE_x) from Time 0 to Time k.  You will also have a slope of Y (say, SLOPE_y) from Time 0 to Time k.  So, you can test if there is a relationship between SLOPE_x and SLOPE_y.  That is, you can test if the change in X is associated with the change in Y. The slopes are latent variables.

The two above can be tested using the "Latent Growth Curve Modeling" technique. However, you need the IBM SPSS Amos to carry out the computation. For a video on how to perform the LGCM using Amos, visit this link: http://amosdevelopment.com/features/growth-curve/index.html

Just let me know if you have further questions.

JOHNNY T. AMORA, MAS

Director, Institutional Effectiveness and Research

De La Salle-College of Saint Benilde
Manila, Philippines

Email: [hidden email] || Fb: https://www.facebook.com/amorajohnny1 

On Wed, Jun 16, 2021 at 5:26 PM AndreasV <[hidden email]> wrote:

I would like to investigate the association between serial measurements of
two metric outcomes (e.g., two laboratory parameters measures repeatedly
over several years). Depending on the data set, measurements may have been
obtained at the same time points for all subjects (study data) or at
different time points ('real world' data). Moreover, I may or may not have
to perform comparisons between subsets of subjects (defined, e.g., by
different treatments received).

- What is the most appropriate statistical procedure for this, and
- (how) can this be done in SPSS (I use Version 24)?

Thank you very much!

Andreas



--
Sent from: http://spssx-discussion.1045642.n5.nabble.com/

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD

===================== To manage your subscription to SPSSX-L, send a message to [hidden email] (not to SPSSX-L), with no body text except the command. To leave the list, send the command SIGNOFF SPSSX-L For a list of commands to manage subscriptions, send the command INFO REFCARD