Answer to Question 1
Severity of illness is the physiologic complexity that comprises the extent and interactions of a patient's disease(s) as presented to medical personnel. Severity of illness scores are based on physiologic measures of the degree of abnormality of individual signs and symptoms of a patient's disease(s). The more abnormal the signs and symptoms, the higher the score.
Answer to Question 2
Analyzing the case mix can forecast health care trends unique to individual settings, ensure that facilities continue to provide appropriate services to their patient populations, and help facilities recognize that different patients require different resources for care.