When a population of controls are selected in such a way that the control group overall characteristics matches that of the cases, it is referred as:
a. Confounder adjustment
b. Individual Matching
c. Frequency Matching
d. Randomization
You perform a case-control study on 200 lung cancer patients and 400 controls investigating an association between marijuana smoke and cancer. Interestingly, you find that 33 of the cancer patients and 33 of the controls report marijuana use. What is the odds ratio examining the association between the exposure (marijuana use) and the disease (lung cancer) in the study?
a. 4.48
b. 1.56
c. 2.20
d. 1.65
