Background information:

You are a practicing health professional and you are intrigued with the possibility of a link between mental health issues and excessive 'screen time'. People are commonly found with eyes glued to their phones and other digital devices that are commonly available these days and there is a surge in mental health related issues and problems. You have already searched the current literature but unfortunately most studies had flaws that you could easily identify. You are considering doing your own research to explore the potential link

What needs to be included;

-pick an aspect of mental health and what sort of study participants you will need.

-what information should be collected to investigate this link

-what measure of association/effect can be obtained from each design

-what will be one specific confounding factor and how or why is each confounding factor individually will affect your findings on this specific study design.

-Write in direct language e.g. I will carry out this study by.......

Question: You will briefly describe the above aspects as one paragraph for each of the chosen study design-> Retrospective Cohort study.