# Rare event logistic regression

I have a situation in which that there are 4 cases with a condition per 1000 people surveyed (binary). I am interested in performing a logistic regression to determine the risk factors (binary). Is it possible to perform such an analysis with SPSS?

• With only 8 cases you cannot even estimate the intercept in a model with no predictors. The only thing you could possibly estimate would be the proportion of $Y=1$ along with a 0.95 Wilson confidence interval. – Frank Harrell Sep 25 '13 at 21:19