Adding risk scores to incident review

Is it possible to add the risk scores to the notables listed in Incident Review? I think it's possible to achieve this with UBA, but I don't have UBA and am unlikely to have it in the short to medium term. What I would like to do is have the risk scores for a notable logged in incident review as one of the columns. Is this possible? We're running splunk ES 4.0.1. Thanks for the assistance, Sheamus