compute dummy variables (present / not present) for each of the 10 categories."whehter or not a risk factor is present in each of the 10 categories predicts the outcome (e.g., if in variable 1 there is a risk factor, is outcome more likely, independent of whether it is for instance risk factor 11 or 23)?"
compute dummy variables for each of the risk factors (unless you have an extremely large dataset, you probably won't find significant results]"which of the total 300 risk factors is related to the outcome?"
create 1 dummy risk / no risk and relate to outcome."if alltogehter, the risk factors increase the likelihood of the outcome (e.g., if any risk factor, doesn't matter wich one, is present, is outcome more likely)"
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