The statistical relationship between marijuana smoking and other forms of drug-taking behavior merely reflects the sequential pattern of drug use among multiple-drug (polydrug)users.

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This statement is true. The statistical relationship between marijuana smoking and other forms of drug-taking behavior often reflects the fact that many people who engage in multiple-drug use start with marijuana and then move on to other drugs. This does not necessarily mean that marijuana use directly causes or leads to other drug use.

The Statistical Relationship Between Marijuana Smoking and Other Forms of Drug-Taking