Epidemiological study design

Below are five research questions. For your initial post, you will choose 3 research questions and select the epidemiological study design that you would use to answer EACH question. You can choose from the following designs: cross-sectional, case-control, cohort, community trial or clinical trial. You can only propose each design one time — in other words, you must use a different design for each of the 3 research questions you choose.

For each of the 3 selected questions, you should describe:

Study design selected

Study period (time)

How study participants will be selected

At least 2 reasons why you chose the design over other designs — be specific.

Cite your sources as needed using APA citation format.

Research Questions 

Is COVID-19 infection associated with vitamin D intake?

Is there a relationship between test scores and number of hours spent on social media among college students?

Does intermittent fasting or a ketogenic diet promote greater weight loss?

Is there a relationship between pet ownership and cardiovascular disease?

Is use of antacids associated with bladder cancer?