Binary logistic regression probability calculation

[jardielbarrera]

Hi,

I'm performing a binary logistic regression, but I want to calculate the probability for each record and append it to the data set, does anyone know how to do this?

Best,

[PGStats]

Look at option PREDPROBS=() in the OUTPUT statement of PROC LOGISTIC.

https://documentation.sas.com/?docsetId=statug&docsetTarget=statug_logistic_syntax27.htm&docsetVersi... 

[jardielbarrera]

Thanks. It works. Very useful.

[ed_sas_member · Accepted solution]

Hi @jardielbarrera 

You can use a SCORE statement to score the same dataset as follows -> it will output individual predicted probabilities in column P_1

proc logistic data=<yourdata>;
	model y (event="1") = <x1 x2>;
	score data=<yourdata> out=want;
run;

The results are identical to the approach suggested by @PGStats , using an OUTPUT statement and the PREDPROBS option assuming you request individual (and not cumulative) probabilities.

proc logistic data=<yourdata>;
	model y (event="1") = <x1 x2>;
	output out=want predprobs=(individual);
run;

Best,

[jardielbarrera]

Thanks a lot. It works.