Question 5 2 pts In a study to identify risk factors for multiple sclerosis (MS), researchers use hospital records to identify 25 people with MS and 25 people without MS then interview them about childhood exposures to pesticides and other chemicals. What type of study is this? Cross-sectional O Prospective cohort Case-control Randomized controlled trial 2 pts Question 6 In a study of the effectiveness of a new allergy medication, 100 people with seasonal allergies are recruited to participate in a study. At random, half of the subjects are given the new medication and half are given a placebo. Neither the subjects nor the clinical researchers know to which group the subjects have been assigned. What type of study is this? O Cross-sectional O Prospective cohort Case-control Randomized controlled trial In experimental studies, what is the term for the process of assigning individuals to study groups in a manner that all possible assignments and compositions of study groups are equally likely? Randomization Blinding Bias O Confounding Age is an important risk factor when considering risk adjustment methods because: O Older patients are less likely to have worse outcomes Older patients are treated more aggressively Increasing age is related to risk of death and risk of complications O Older patients have a high ability to rebound from acute illness As a risk factor for disease, comorbidities predict long-term survival, mortality, and the ability of patients to tolerate treatments. True False