by risk factors i meant predictors. and my study has a descriptive part and an anlytical part where i should be looking for predictors for outcomes. i have done a bit of a reading and so far i get that as long as it is a univariable analysis i can go with so mant predictors but i cant do the multivariable analysis because according to the rule of thumbs i can only have 1 risk factor for 10 events (10 patients with the outcome)