1. A method for determining a probability of a disease state for a patient, comprising: obtaining medical information including at least one of a medical image, information representative of the medical image, and information representative of a clinical examination of the patient; calculating the probability of the disease state based on the obtained medical information; transforming the calculated probability using a training database prevalence factor and a user-input prevalence factor indicative of the prevalence of the disease state in a population best suited to the user; and outputting the transformed probability of the disease state.