A researcher collected data on predisposing factors for depression from 100 women who had undergone an emergency C-section. Participants completed a depression scale two weeks after delivery. This is a description of what type of study?

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In a retrospective study, participants are asked about exposure to the independent variable after it has occurred. In a prospective study, participants are followed forward in time to see if they develop the dependent variable of interest. A time-series study involves collecting information about the dependent variable at several points in time.

A Researcher Collected Data on Predisposing Factors for Depression from 100