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An observational study is retrospective if it considers only existing data. It is prospective if the study design calls for data to be collected as ti

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asked 2021-07-05
An observational study is retrospective if it considers only existing data. It is prospective if the study design calls for data to be collected as time goes on. Tell which of the following observational studies are retrospective and which are prospective. In a study of post-traumatic stress disorder, soldiers who have been in combat are given biannual physical and psychological tests for five years after they return from active duty.

Answers (1)

2021-07-06
Retrospective: data are collected from the past by going back in time Prospective: data are collected in the future
The study followed the soldiers for five years, which implies that they were contacted at some point in time and were followed in the following five years.
This then implies that the data. are collected in the future (in the next five years) and thus the observational study is prospective.
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