Scoring Formula using Proc Logistic Output

Marianne — Wed, 28 Mar 2012 22:21:50 GMT

I have received the following output in Proc Logistic:

Variable	DF	Estimate	StdErr	WaldChiSq	ProbChiSq	StandardizedEst
Intercept	1	-0.1744	0.2316	0.5671	0.4514	_
Var1	1	1.7537	0.2977	34.7055	<.0001	0.0772
Var2	1	0.0262	0.00393	44.3659	<.0001	0.0792
Var3	1	-0.4627	0.0773	35.8634	<.0001	-0.0813
Var4	1	-0.3209	0.049	42.8821	<.0001	-0.0884
Var5	1	-0.00191	0.000206	86.6722	<.0001	-0.1216
Var6	1	-0.7336	0.1117	43.1698	<.0001	-0.1282
Var7	1	-0.9459	0.1632	33.5811	<.0001	-0.057

How do I convert it into scoring formula?

I tried a formula based on the Estimate column:
-0.1744+1.7537*Var1+0.0262*Var2-0.4627*Var3 etc.. However, the result I am getting does not match the Score if I were to score using Proc Logistic (Proc Logistic Inmodel=a.Model)

I need to be able to create the score produced using Inmodel statement, but using linear function Intercept+XVar1+YVar2... Which info from the output I should be using and what is the transformation (if any) required?

Thank you!

Scoring Formula using Proc Logistic Output

PGStats — Wed, 28 Mar 2012 22:31:10 GMT

What you get with your expression F = intercept + Var1*b1 + ... is Logit(p) = Ln(p/(1-p)). You want to estimate p = exp(F)/(1+exp(F)) = 1 / (1+exp(-F)).

topic Scoring Formula using Proc Logistic Output in Statistical Procedures

Scoring Formula using Proc Logistic Output

Scoring Formula using Proc Logistic Output