Wow! What an interesting question. I assume you are looking at equine data, correct? Can you tell me a little more about your research question(s)?

Thank you, Mrs Hood! We are talking about racing outcomes of horses undergoing a Endurance season. We have a wide amount of variables related to racing performance and thus the purpose is to qualify each horse based on the whole available data.

In a case-control study, how could I use the whole data to assign each group?