Abstract: A system is provided for facilitating the development of an individualised treatment regimen for a patient based on an evaluation of the risk(s) associated with a disease and/or associated with known treatment options. In order to evaluate these risk(s), the system utilises clinical data from a plurality of patients having the disease in question. The clinical data includes information for each of the plurality of patients relating to the presence, absence and/or severity of one or more negative events. The negative event(s) can be disease-related, for example, a complication such as metastasis of a cancer to bone or the brain, or the negative event(s) can be treatment-related, for example a toxicity associated with the treatment. The system can also include prediction models that allow the probability that a patient will develop a toxicity or complication to be assessed. Methods for developing prediction models are provided.