A recent study in The Lancet found that “risk of psychosis is three times higher

Question

A recent study in The Lancet found that “risk of psychosis is three times higher for users of potent ‘skunk-like’ cannabis than for non-users.” The study consisted of individuals who had experienced a first episode of psychosis, as well as healthy controls. Each participant filled out the Cannabis Experience Questionnaire modified version (CEQmv), from which investigators were able to obtain a detailed history of cannabis use, as well as information on history of use of tobacco, alcohol, other recreational drugs. Which of the following is a variable in this study?

a. the number of individuals who experienced a first episode of psychosis

b. the average age of study participants

c. the percent of study participants that are Asian

d. the most used type of cannibis (classified as never used, hash-like, and skunk-like)

e. the risk of psychosis is 3 times higher

Explanation / Answer

The variable in this study is:

The most used type of cannibis (classified as never used, hash-like, and skunk-like)

Option D is correct.

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