Final answer:
Risk factors for contrast reaction include contact dermatitis, delayed-type hypersensitivity, autoimmune diseases, and certain lifestyle factors. These risk factors can increase the likelihood of experiencing a reaction to contrast substances.
Step-by-step explanation:
Risk factors for contrast reaction include contact dermatitis caused by exposure to certain substances such as latex, and delayed-type hypersensitivity as seen in a tuberculin reaction. Other risk factors include autoimmune diseases like diabetes mellitus type I, multiple sclerosis, and rheumatoid arthritis. Additionally, conditions like hypertension and diabetes, as well as obesity, poor nutrition, lack of physical activity, and tobacco use, can also increase the risk of contrast reaction.