Can you identify the design of the following study? Here are some designs to con

Question

Can you identify the design of the following study? Here are some designs to consider: Case- control study, retrospective study, cohort study, randomized controlled trial. Justify your answer briefly. A research group is interested in the effects on cigarette smoking cessation of the hormone progesterone. They hypothesize that administering exogenous progesterone may reduce impulsivity, leading to more successful smoking cessation. "Exogenous progesterone" refers to progesterone given by capsule, in addition to the progesterone that the human body naturally produces.) 126 current smokers with a desire to quit smoking are recruited and randomized 1:1 to either progesterone or placebo. After 4 weeks of progesterone or placebo therapy, the researchers compare the proportion of successful quitters in each group.

Explanation / Answer

this study is not retrospective study as people are recruited in this study which is not the case in retropective study.

This study is case control study as two different group exists which are different in outcomes and are supposed to be compared on the the observation.

In case control study cases are identified, controls are selected which may be matched to cases,exposure is measured and the comparison is measured due to presence or absence of exposure in cases or controls,

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