Hi Johnny and all,
Let me please add myself to the same question. I will also try to bring two possibilities:
I had a very similar situation (70/930) and I was told that I could use the ordinal logistic regression if ‘ordinal’ makes sense for the data (because although I had two values, original variable was a Likert scale). So, Johnny, do you have an original dichotomous variable or is it a recoding of a non-dichotomous variable?
If ordinal doesn’t make sense, I was told that I could use ‘count models’, apparently designed for unequal variable distribution, like the Zero-inflated Poisson Regression or the Zero-truncated Poisson Regression. I haven’t done my homework yet and I don’t know these models but I believe they are not available in SPSS: https://stats.idre.ucla.edu/other/dae/
Kind regards,
A
De: SPSSX(r) Discussion <[hidden email]> En nombre de John Amora
Enviado el: martes, 16 de marzo de 2021 9:48
Para: [hidden email]
Asunto: Binary Logistic Regression for Rare Events
Hi, SPSS Users:
Is there a specialized algorithm in SPSS that handles Binary Logistic Regression for rare events? Rare events happen if, for example, you have a sample size of 1000 but only 20 events.
How rare events are handled in SPSS?
Thank you.
JOHNNY T. AMORA, MAS
Director, Office of Institutional Effectiveness and Research
De La Salle-College of Saint Benilde
Taft Avenue, Manila, Philippines
===================== 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
| Free forum by Nabble | Edit this page |