A cohort study is not an appropriate study design in this

Reference no: EM13611973

A 5-year prospectA 5-year prospective cohort study has just been completed. The study was designed to assess the association between supplemental vitamin A exposure and mortality and morbidity from measles. The RR for incidence of measles was 0.75, and the RR for measles mortality was 0.5. Which statement is correct?

1- A cohort study is not an appropriate study design in this case because the association between one exposure and two different outcomes is being considered.

2- One of the problems that this study may have faced is individuals lost to follow-up during the 5-year period.

3- A cohort study was not a good design to study this association because measles is a very common disease.

4- None of the above

Reference no: EM13611973

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