Describe what a population-based case-control study is and why it is appropriate to use for this type of study.
Summarize the statistical data presented in the article and how it relates to other data studied in this course.
Discuss both the results of the study and how the results compare to other studies mentioned in the article. What factors impact these results? Be sure to address each of the following factors:

Data collection methodology
Alcohol use
Marijuana use
Multi-substance use
Driver demographics
Sample population